Back-Up Light Does Not Illuminate

LIGHTING: LIGHTING SYSTEM: Back-up Light does not Illuminate
- Back-up Light does not Illuminate

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
First perform the communication function inspections in HOW TO PROCEED WITH TROUBLESHOOTING to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (BACK-UP LIGHT)

(a) Using the Techstream, perform the Active Test.

Body No. 4





OK:

Back-up light condition is switched by Active Test.

NG -- CHECK REAR JUNCTION BLOCK ECU (BCK1 VOLTAGE)

OK -- GO TO AUTOMATIC TRANSMISSION SYSTEM AA80E Automatic Transmission System

2. CHECK REAR JUNCTION BLOCK ECU (BCK1 VOLTAGE)





(a) Disconnect the S63 ECU connector.

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

Standard voltage:





NOTICE:
Do not start the engine.

NG -- REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (REAR LIGHT - REAR JUNCTION BLOCK ECU AND BODY GROUND)





(a) Disconnect the S63 ECU connector.

(b) Disconnect the S33 and S41 light connectors.

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

Standard resistance:

for LH
for RH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE REAR LIGHT ASSEMBLY Removal