Toyota CH-R Service Manual: Open in Ion Generator Circuit (B14B9)

DESCRIPTION

The ion generator sub-assembly operates when both the ion generator switch and the blower switch are on. The air conditioning amplifier assembly sends a drive signal to the ion generator sub-assembly. When the ion generator sub-assembly receives the drive signal and starts to operate, it outputs an operation condition signal to the air conditioning amplifier assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B14B9

Open in Ion Generator Circuit

Open in ion generator sub-assembly circuit

  • Harness or connector between ion generator sub-assembly and power source circuit
  • Harness or connector between ion generator sub-assembly and body ground
  • Harness or connector between ion generator sub-assembly and air conditioning amplifier assembly
  • Ion generator sub-assembly
  • Air conditioning amplifier assembly

Memorized

(12 seconds or more)*

  • *: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (ION GENERATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Air Conditioner > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Ion Generator

Ion generator sub-assembly

OFF or ON

-

Body Electrical > Air Conditioner > Active Test

Tester Display

Ion Generator

OK:

Ion generator sub-assembly operates normally.

Result

Proceed to

NG

A

OK (When troubleshooting according to Problem Symptoms Table)

B

OK (When troubleshooting according to the DTC)

C

B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 6

A

2.

CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - POWER SOURCE)

(a) Disconnect the ion generator sub-assembly connector.

*a

Front view of wire harness connector

(to Ion Generator Sub-assembly)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G2-1 (IG) -Body ground

Ignition switch ON

11 to 14 V

G2-1 (IG) -Body ground

Ignition switch off

Below 1 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-4 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (ION GENERATOR SUB-ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the F72 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F72-17 (NAIN) - G2-3 (IG+)

Always

Below 1 Ω

F72-37 (NANO) - G2-2 (PCL)

Always

Below 1 Ω

F72-17 (NAIN) or G2-3 (IG+) - Body ground

Always

10 kΩ or higher

F72-37 (NANO) or G2-2 (PCL) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY COMMUNICATION POWER SUPPLY

(a) Reconnect the F72 air conditioning amplifier assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G2-3 (IG+) - Body ground

  • Ignition Switch ON
  • Blower switch off

3.5 to 5 V

NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

OK

5.

CHECK ION GENERATOR SUB-ASSEMBLY OUTPUT

(a) Reconnect the G2 ion generator sub-assembly connector.

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

*a

Component with harness connected

(Air Conditioning Amplifier Assembly)

-

-

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F72-17 (NAIN) - Body ground

  • Ignition Switch ON
  • Blower switch Lo

Below 2 V

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPLACE ION GENERATOR SUB-ASSEMBLY

6.

CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Air Conditioner > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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