Toyota 4Runner: Inside Handle Illumination Light Circuit

Toyota 4Runner Service Manual / Vehicle Interior / Lighting (int) / Lighting System / Inside Handle Illumination Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the inside handle illumination.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	CHECK DOOR INSIDE HANDLE ILLUMINATION

(a) Check the each door inside handle illumination.

Result

Result	Proceed to
Front door inside handle illumination does not come on.	A
Rear door inside handle illumination does not come on.	B

GO TO STEP 5

2.	INSPECT NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY (FRONT DOOR INSIDE HANDLE ILLUMINATION) (LH OR RH)

(a) Remove the No. 1 interior illumination light assembly (front door inside handle illumination) (See page ).

(b) Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead to terminal 2.

Text in Illustration

*a	Component without harness connected (No. 1 Interior Illumination Light Assembly (Front Door Inside Handle Illumination))

OK:

No. 1 interior illumination light assembly (front door inside handle illumination) comes on

REPLACE NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY (FRONT DOOR INSIDE HANDLE ILLUMINATION)

3.	CHECK HARNESS AND CONNECTOR (BATTERY - NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

(a) Disconnect the h2*1 or g3*2 No. 1 interior illumination light assembly (front door inside handle illumination) connector.

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

*1: for LH
*2: for RH

Standard Voltage:

for LH

Tester Connection	Condition	Specified Condition
h2-2 - Body ground	Always	11 to 14 V

for RH

Tester Connection	Condition	Specified Condition
g3-2 - Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (NO. 1 INTERIOR ILLUMINATION - DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the h2*1 or g3*2 No. 1 interior illumination light assembly (front door inside handle illumination) connector.

(b) Disconnect the 2B driver side junction block assembly connector.

*1: for LH
*2: for RH

Standard Resistance (Check for Open):

for LH

Tester Connection	Condition	Specified Condition
h2-1 - 2B-36	Always	Below 1 Ω

for RH

Tester Connection	Condition	Specified Condition
g3-1 - 2B-36	Always	Below 1 Ω

Standard Resistance (Check for Short):

for LH

Tester Connection	Condition	Specified Condition
h2-1 or 2B-36 - Body ground	Always	10 kΩ or higher

for RH

Tester Connection	Condition	Specified Condition
g3-1 or 2B-36 - Body ground	Always	10 kΩ or higher

Result

Result	Proceed to
NG	A
OK	B

REPAIR OR REPLACE HARNESS OR CONNECTOR

GO TO STEP 8

5.	INSPECT NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY (REAR DOOR INSIDE HANDLE ILLUMINATION) (LH OR RH)

(a) Remove the No. 2 interior illumination light assembly (rear door inside handle illumination) (See page ).

(b) Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead to terminal 2.

Text in Illustration

*a	Component without harness connected (No. 2 Interior Illumination Light Assembly (Rear Door Inside Handle Illumination))

OK:

No. 2 interior illumination light assembly (rear door inside handle illumination) comes on

REPLACE NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY (REAR DOOR INSIDE HANDLE ILLUMINATION)

6.	CHECK HARNESS AND CONNECTOR (BATTERY - NO. 2 INTERIOR ILLUMINATION LIGHT ASSEMBLY)

(a) Disconnect the j2*1 or i2*2 No. 2 interior illumination light (rear door inside handle illumination) connector.

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

*1: for LH
*2: for RH

Standard Voltage:

for LH

Tester Connection	Condition	Specified Condition
j2-2 - Body ground	Always	11 to 14 V

for RH

Tester Connection	Condition	Specified Condition
i2-2 - Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	CHECK HARNESS AND CONNECTOR (NO. 2 INTERIOR ILLUMINATION - DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the j2*1 or i2*2 No. 2 interior illumination light (rear door inside handle illumination) connector.

(b) Disconnect the 2B driver side junction block assembly connector.

*1: for LH
*2: for RH

Standard Resistance (Check for Open):

for LH

Tester Connection	Condition	Specified Condition
j2-1 - 2B-36	Always	Below 1 Ω

for RH

Tester Connection	Condition	Specified Condition
i2-1 - 2B-36	Always	Below 1 Ω

Standard Resistance (Check for Short):

for LH

Tester Connection	Condition	Specified Condition
j2-1 or 2B-36 - Body ground	Always	10 kΩ or higher

for RH

Tester Connection	Condition	Specified Condition
i2-1 or 2B-36 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

(a) Remove the driver side junction block assembly (See page ).

Text in Illustration

Component without harness connected

(Driver Side Junction Block Assembly)

(b) Remove the main body ECU (multiplex network body ECU) from driver side junction block assembly.

Standard Resistance:

Tester Connection	Condition	Specified Condition
2B-36 - A-26 (FSPT)	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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