Toyota CH-R Service Manual: Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / Passenger Airbag ON/OFF Indicator Circuit Malfunction (B1660/43)

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger without door airbag assembly.

DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Test Mode / Check Mode

B1660/43

Passenger Airbag ON/OFF Indicator Circuit Malfunction

Any of the following conditions is met:

  • The airbag sensor assembly detects a line short in the passenger airbag ON/OFF indicator circuit.
  • The airbag sensor assembly detects a short to ground in the passenger airbag ON/OFF indicator circuit.
  • The airbag sensor assembly detects a short to B+ in the passenger airbag ON/OFF indicator circuit.
  • The airbag sensor assembly detects an open in the passenger airbag ON/OFF indicator circuit.
  • Passenger airbag ON/OFF indicator malfunction
  • Airbag sensor assembly malfunction
  • Instrument panel wire
  • Instrument panel junction block assembly
  • Passenger airbag ON/OFF indicator (Clock assembly)
  • Airbag sensor assembly

Does not apply to test/check mode

DTC Detection Conditions:
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Pattern 5

Pattern 6

Diagnosis Condition

Ignition switch ON

Malfunction Status

The airbag sensor assembly detects a line short in the passenger airbag ON/OFF indicator circuit

-

-

-

-

-

The airbag sensor assembly detects a short to ground in the passenger airbag ON/OFF indicator circuit

-

-

-

-

-

The airbag sensor assembly detects a short to B+ in the passenger airbag ON/OFF indicator circuit

-

-

-

-

-

The airbag sensor assembly detects an open in the passenger airbag ON/OFF indicator circuit

-

-

-

-

-

Passenger airbag ON/OFF indicator malfunction

-

-

-

-

-

Airbag sensor assembly malfunction

-

-

-

-

-

Detection Time

-

-

-

-

-

-

Number of Trips

1 trip

1 trip

1 trip

1 trip

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Turn the ignition switch ON.

(b) Check the passenger airbag ON/OFF indicator operation.

HINT:

Refer to the normal condition of the passenger airbag ON/OFF indicator.

Click here

Result

Proceed to

Passenger airbag ON/OFF indicator illumination is always on.

A

Passenger airbag ON/OFF indicator illumination is always off.

B

B

GO TO STEP 13

A

2.

CHECK CONNECTORS

(a) Turn the ignition switch ON.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the airbag sensor assembly, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

OK:

The connectors are properly connected.

HINT:

If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the airbag sensor assembly, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

(e) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE

OK

3.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

(a) Connect the connector to the passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch ON.

(d) Check the passenger airbag ON/OFF indicator operation.

OK:

The passenger airbag ON/OFF indicator does not come on.

NG

GO TO STEP 5

OK

4.

CHECK DTC

(a) Turn the ignition switch off.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Connect the connector to the airbag sensor assembly.

(d) Connect the cable to the negative (-) battery terminal.

(e) Clear the DTCs stored in memory.

Click here

Body Electrical > SRS Airbag > Clear DTCs

(f) Turn the ignition switch off.

(g) Turn the ignition switch ON, and wait for at least 60 seconds.

(h) Check for DTCs.

Click here

Body Electrical > SRS Airbag > Trouble Codes

OK:

DTC B1660/43 is not output.

HINT:

Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

5.

CHECK WIRE HARNESS (OPEN)

(a) Turn the ignition switch off.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Disconnect the connector from the passenger airbag ON/OFF indicator (clock assembly).

(d) Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - F81-3 (P-AB)

Always

Below 1 Ω

NG

GO TO STEP 12

OK

6.

CHECK WIRE HARNESS (SHORT)

(a) Disconnect the service wire from connector B.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - F81-3 (P-AB)

Always

1 MΩ or higher

NG

GO TO STEP 11

OK

7.

CHECK WIRE HARNESS (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

(b) Turn the ignition switch ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F81-4 (PAON) - Body ground

Ignition switch ON

Below 1 V

F81-3 (P-AB) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

(e) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NG

GO TO STEP 10

OK

8.

CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Measure the resistance according to the value(s) in the table below.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - Body ground

Always

1 MΩ or higher

F81-3 (P-AB) - Body ground

Always

1 MΩ or higher

OK

REPLACE PASSENGER AIRBAG ON/OFF INDICATOR (CLOCK ASSEMBLY)

NG

9.

CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - Body ground

Always

1 MΩ or higher

3A-29 (PAON) - Body ground

Always

1 MΩ or higher

3A-46 (P-AB) - Body ground

Always

1 MΩ or higher

3A-51 (P-AB) - Body ground

Always

1 MΩ or higher

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

10.

CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

3A-8 (PAON) - Body ground

Ignition switch ON

Below 1 V

3A-29 (PAON) - Body ground

Ignition switch ON

Below 1 V

3A-46 (P-AB) - Body ground

Ignition switch ON

Below 1 V

3A-51 (P-AB) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

11.

CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - 3A-46 (P-AB)

Always

1 MΩ or higher

3A-29 (PAON) - 3A-51 (P-AB)

Always

1 MΩ or higher

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

12.

CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Airbag Sensor Assembly)

HINT:

The service wire has already been inserted into connector B.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - 3A-46 (P-AB)

Always

Below 1 Ω

(c) Disconnect the service wire from connector B.

(d) Using a service wire, connect terminals 3 (P-AB) and 4 (PAON) of connector E.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-29 (PAON) - 3A-51 (P-AB)

Always

Below 1 Ω

(f) Disconnect the service wire from connector E.

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

13.

CHECK CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the airbag sensor assembly, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

OK:

The connectors are properly connected.

HINT:

If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the airbag sensor assembly, passenger airbag ON/OFF indicator (clock assembly) and instrument panel junction block assembly.

(e) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE INSTRUMENT PANEL WIRE

OK

14.

CHECK WIRE HARNESS (OPEN)

(a) Connect the connector to the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

(b) Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - F81-3 (P-AB)

Always

Below 1 Ω

NG

GO TO STEP 24

OK

15.

CHECK WIRE HARNESS (SHORT)

(a) Disconnect the service wire from connector B.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - F81-3 (P-AB)

Always

1 MΩ or higher

NG

GO TO STEP 23

OK

16.

CHECK WIRE HARNESS (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

(b) Turn the ignition switch ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F81-4 (PAON) - Body ground

Ignition switch ON

Below 1 V

F81-3 (P-AB) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

(e) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NG

GO TO STEP 22

OK

17.

CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Measure the resistance according to the value(s) in the table below.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (PAON) - Body ground

Always

1 MΩ or higher

F81-3 (P-AB) - Body ground

Always

1 MΩ or higher

NG

GO TO STEP 21

OK

18.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)

(a) Connect the cable to the negative (-) battery terminal.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

-

-

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F81-7 (B) - Body ground

Ignition switch off

11 to 14 V

(c) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NG

REPLACE WIRE HARNESS OR BATTERY

OK

19.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR

(a) Connect the connector to the passenger airbag ON/OFF indicator (clock assembly).

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

-

-

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch ON.

(d) Check the passenger airbag ON/OFF indicator according to the conditions in the table below.

OK:

Terminal Connection

Switch Condition

Specified Condition

F70-23 (PAON) - Body ground

Ignition switch ON

"ON" comes on

F70-17 (P-AB) - Body ground

Ignition switch ON

"OFF" comes on

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NG

REPLACE PASSENGER AIRBAG ON/OFF INDICATOR (CLOCK ASSEMBLY)

OK

20.

CHECK DTC

(a) Connect the connector to the airbag sensor assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

(b) Connect the cable to the negative (-) battery terminal.

(c) Clear the DTCs stored in memory.

Click here

Body Electrical > SRS Airbag > Clear DTCs

(d) Turn the ignition switch off.

(e) Turn the ignition switch ON, and wait for at least 60 seconds.

(f) Check for DTCs.

Click here

Body Electrical > SRS Airbag > Trouble Codes

OK:

DTC B1660/43 is not output.

HINT:

Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE AIRBAG SENSOR ASSEMBLY

21.

CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - Body ground

Always

1 MΩ or higher

3A-29 (PAON) - Body ground

Always

1 MΩ or higher

3A-46 (P-AB) - Body ground

Always

1 MΩ or higher

3A-51 (P-AB) - Body ground

Always

1 MΩ or higher

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

22.

CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

3A-8 (PAON) - Body ground

Ignition switch ON

Below 1 V

3A-29 (PAON) - Body ground

Ignition switch ON

Below 1 V

3A-46 (P-AB) - Body ground

Ignition switch ON

Below 1 V

3A-51 (P-AB) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

(f) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

23.

CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the connector from the instrument panel junction block assembly.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - 3A-46 (P-AB)

Always

1 MΩ or higher

3A-29 (PAON) - 3A-51 (P-AB)

Always

1 MΩ or higher

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

24.

CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the connector from the instrument panel junction block assembly.

HINT:

The service wire has already been inserted into connector B.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Airbag Sensor Assembly)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-8 (PAON) - 3A-46 (P-AB)

Always

Below 1 Ω

(c) Disconnect the service wire from connector B.

(d) Using a service wire, connect terminals 3 (P-AB) and 4 (PAON) of connector E.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

*A

w/o Occupant Classification System

*B

w/ Occupant Classification System

*1

Instrument Panel Junction Block Assembly

*2

Airbag Sensor Assembly

*3

Passenger Airbag ON/OFF Indicator (Clock Assembly)

*4

Instrument Panel Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Instrument Panel Junction Block Assembly)

*b

Front view of wire harness connector

(to Passenger Airbag ON/OFF Indicator (Clock Assembly))

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-29 (PAON) - 3A-51 (P-AB)

Always

Below 1 Ω

(f) Disconnect the service wire from connector E.

OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPLACE INSTRUMENT PANEL WIRE

    Manual Cut off Switch Trouble (B1651/33)
    DESCRIPTION The airbag cut off switch circuit consists of the airbag sensor assembly and airbag cut off switch cylinder sub-assembly. The instrument panel passenger without door airbag assembly ca ...

    Short in Front Passenger Side Squib Circuit (B1805/52-B1808/52)
    DESCRIPTION The front passenger side squib circuit consists of the airbag sensor assembly and instrument panel passenger without door airbag assembly. The airbag sensor assembly uses this circuit ...

    Other materials:

    Toyota CH-R Service Manual > Vehicle Stability Control System: Brake Warning Light Remains ON
    DESCRIPTION The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication. If any of the following is detected, the brake system warning light (red indicator) remains on: The skid control ECU (brake actuator assembly) connector is d ...

    Toyota CH-R Service Manual > Toyota Entune System: Dtc Check / Clear
    DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Telematics / Trouble Codes. Body Electrical > Telematics > Trouble Codes (e) Check for DTCs. Click here ...

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