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 (INTEGRATION RELAY - BATTERY AND BODY GROUND)

(a) Disconnect the 1H integration relay connector.

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

Standard Voltage:

Standard Resistance:

Text in Illustration

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

Standard Resistance:

Text in Illustration

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

2. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - POWER MANAGEMENT CONTROL ECU)

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

(b) Disconnect the 1G integration relay connector.

(c) Disconnect the A21 power management control ECU 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.

3. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - REAR COMBINATION LIGHT ASSEMBLY)

(a) Disconnect the 1G integration relay connector.

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

(c) 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 INTEGRATION NO.1 RELAY

(a) Temporarily replace the integration relay with a new or normally functioning one Components.

(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