Back-Up Light Circuit

LIGHTING (EXT): LIGHTING SYSTEM: Back-up Light Circuit
- Back-up Light Circuit

DESCRIPTION

The power management control ECU controls the back-up lights.

WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - AUXILIARY BATTERY AND BODY GROUND)

(a) Disconnect the 1H No. 1 integration relay connector.

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

Standard Voltage:





Standard Resistance:





(c) Disconnect the 1G No. 1 integration relay connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the A21 power management control ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - REAR COMBINATION LIGHT ASSEMBLY)

(a) Disconnect the S18 or R17 rear combination light assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE NO. 1 INTEGRATION RELAY

(a) Temporarily replace the No. 1 integration relay with a new or normally functioning one Removal.

(b) Check that the back-up lights operate normally.

OK:

The back-up lights operate normally.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Exterior Lighting System

OK -- END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)