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.

(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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

GO TO STEP 4

GO TO STEP 7

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)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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.

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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.

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

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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.

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

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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