Room Light Circuit

LIGHTING: LIGHTING SYSTEM: Room Light Circuit

Room Light Circuit

DESCRIPTION

When the courtesy switch signal is received from the door ECU or passenger side junction block ECU, the map light, vanity light, scuff plate light, step light and key cylinder light illuminate.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (ROOM LIGHT)
(a) Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the room light illuminates.

Body No. 3





OK:
Room light illuminates.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
2. CHECK STEP LIGHT
(a) Check that the step light illuminates.
OK:
Step light illuminates.
NG -- INSPECT STEP LIGHT
OK -- Continue to next step.
3. CHECK VANITY LIGHT
(a) Check that the vanity light illuminates.
OK:
Vanity light illuminates.
NG -- INSPECT VANITY LIGHT ASSEMBLY
OK -- Continue to next step.
4. CHECK MAP LIGHT
(a) Check that the map light illuminates.
OK:
Map light illuminates.
NG -- INSPECT MAP LIGHT ASSEMBLY
OK -- Continue to next step.
5. CHECK IGNITION KEY CYLINDER LIGHT
(a) Check that the ignition key cylinder light illuminates.
OK:
Ignition key cylinder light illuminates.
NG -- INSPECT KEY CYLINDER LIGHT ASSEMBLY
OK -- Continue to next step.
6. CHECK SCUFF PLATE LIGHT
(a) Check that the scuff plate light illuminates.
OK:
Scuff plate light illuminates.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
7. INSPECT SCUFF PLATE LIGHT




(a) Remove the scuff plate light.
(b) Apply battery voltage to the scuff light connector and check that the scuff plate light illuminates.
OK:






NG -- REPLACE SCUFF PLATE LIGHT
OK -- Continue to next step.
8. CHECK WIRE HARNESS (SCUFF PANEL LIGHT - ECU AND BATTERY)




(a) Disconnect the S11*1 or S12*2 light connector.
HINT:
*1: LH
*2: RH
(b) Disconnect the P4 ECU connector.
(c) Measure the voltage of the wire harness side connectors.
Standard voltage:
LH





RH





(d) Measure the resistance of the wire harness side connectors.
Standard resistance:
LH





RH





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
9. INSPECT STEP LIGHT




(a) Remove the step light.
(b) Apply battery voltage to the step light connector and check that the step light illuminates.
OK:






NG -- REPLACE STEP LIGHT ASSEMBLY
OK -- Continue to next step.
10. CHECK WIRE HARNESS (STEP LIGHT - ECU AND BATTERY)




(a) Disconnect the F11*1 or F12*2 light connector.
HINT:
*1: LH
*2: RH
(b) Disconnect the P4 ECU connector.
(c) Measure the voltage of the wire harness side connectors.
Standard voltage:
LH





RH





(d) Measure the resistance of the wire harness side connectors.
Standard resistance:
LH





RH





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
11. INSPECT VANITY LIGHT ASSEMBLY




(a) Remove the vanity light.
(b) Apply battery voltage to the vanity light connector and check that the vanity light illuminates.
OK:






NG -- REPLACE VANITY LIGHT ASSEMBLY
OK -- Continue to next step.
12. CHECK WIRE HARNESS (VANITY LIGHT - BATTERY AND BODY GROUND)




(a) Disconnect the V9*1 or V10*2 light connector.
HINT:
*1: LH
*2: RH
(b) Measure the voltage of the wire harness side connectors.
Standard voltage:
LH





RH





(c) Measure the resistance of the wire harness side connectors.
Standard resistance:
LH





RH





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
13. INSPECT MAP LIGHT ASSEMBLY




(a) Remove the map light.
(b) Apply battery voltage to the map light connector and check that the map light illuminates.
OK:






NG -- REPLACE MAP LIGHT ASSEMBLY
OK -- Continue to next step.
14. CHECK WIRE HARNESS (MAP LIGHT - ECU, BATTERY AND BODY GROUND)




(a) Disconnect the P12 light connector.
(b) Disconnect the P4 ECU connector.
(c) Measure the voltage of the wire harness side connectors.
Standard voltage:





(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
15. INSPECT KEY CYLINDER LIGHT ASSEMBLY




(a) Remove the key cylinder light.
(b) Apply battery voltage to the key cylinder light connector and check that the key cylinder light illuminates.
OK:






NG -- REPLACE KEY CYLINDER LIGHT ASSEMBLY
OK -- Continue to next step.
16. CHECK WIRE HARNESS (KEY CYLINDER LIGHT - ECU, BATTERY AND BODY GROUND)




(a) Disconnect the I17 light connector.
(b) Disconnect the P4 ECU connector.
(c) Measure the voltage of the wire harness side connectors.
Standard voltage:





(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE