Toyota CH-R Service Manual: Ambient Illumination Light Circuit

Toyota CH-R Service Manual / Lighting (int) / Lighting System / Ambient Illumination Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the ambient illumination lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the lights for circuits related to this system before performing the following procedure.
  • Before replacing the main ECU (multiplex network body ECU), refer to Registration*1.

    Click here

    • *1: w/ Smart Key System

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(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 / Main Body / Active Test.

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

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Interior Illumination Light1

  • Cup holder illumination light
  • Door ambient illumination light

ON or OFF

Preconditions for using the Active Test to check dimmer controlled illumination:

  • Ignition switch ON.
  • Shift lever is in any position other than P.

Interior Illumination Light2

  • Cup holder illumination light
  • Door ambient illumination light

ON or OFF

Preconditions for using the Active Test to check dimmer controlled illumination:

  • Ignition switch ON.
  • Shift lever is in any position other than P.
Body Electrical > Main Body > Active Test

Tester Display

Interior Illumination Light1

Body Electrical > Main Body > Active Test

Tester Display

Interior Illumination Light2

OK:

Ambient illumination lights comes on.

Result

Proceed to

OK

A

NG (All ambient lights do not illuminate)

B

NG (Cup holder illumination light does not illuminate)

C

NG (Door ambient illumination light does not illuminate)

D

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 4

D

GO TO STEP 7

B

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

3K-1 - Body ground

Always

11 to 14 V

*a

Front view of wire harness connector

(to Instrument Junction Block Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the 3D instrument panel junction block assembly connector.

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

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

3K-1 - 3D-24

Always

Below 1 Ω

3K-1 - 3D-25

Always

Below 1 Ω

3K-1 - 3D-26

Always

Below 1 Ω

3K-1 - 3D-27

Always

Below 1 Ω

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

4.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the 3D instrument panel junction block assembly connector.

(b) Disconnect the 3K instrument panel junction block assembly connector.

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

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

3K-1 - 3D-26

Always

Below 1 Ω

3K-1 - 3D-27

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (INSTRUMENT CLUSTER FINISH PANEL GARNISH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the F87 instrument cluster finish panel garnish connector.

(b) Disconnect the F88 instrument cluster finish panel center garnish connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F87-2 (B) - 3D-26

Always

Below 1 Ω

F88-2 (B) - 3D-27

Always

Below 1 Ω

F87-2 (B) or 3D-26 - Body ground

Always

10 kΩ or higher

F88-2 (B) or 3D-27 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (INSTRUMENT CLUSTER FINISH PANEL GARNISH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the F16 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F87-1 (E) - F16-21 (LED1)

Always

Below 1 Ω

F88-1 (E) - F16-21 (LED1)

Always

Below 1 Ω

F87-1 (E) or F16-21 (LED1) - Body ground

Always

10 kΩ or higher

F88-1 (E) or F16-21 (LED1) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly connectors.

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

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

3K-1 - 3D-24

Always

Below 1 Ω

3K-1 - 3D-25

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

8.

CHECK HARNESS AND CONNECTOR (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the I11 No. 1 interior illumination light assembly RH connector.

(b) Disconnect the J9 No. 1 interior illumination light assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I11-1 (+) - 3D-24

Always

Below 1 Ω

I11-1 (+) or 3D-24 - Body ground

Always

10 kΩ or higher

J9-1 (+) - 3D-25

Always

Below 1 Ω

J9-1 (+) or 3D-25 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

CHECK HARNESS AND CONNECTOR (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the F16 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I11-2 (-) - F16-22 (LED2)

Always

Below 1 Ω

I11-2 (-) or F16-22 (LED2) - Body ground

Always

10 kΩ or higher

J9-2 (-) - F16-22 (LED2)

Always

Below 1 Ω

J9-2 (-) or F16-22 (LED2) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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