LIGHTING SYSTEM > Back-up Light Circuit

for Preparation Click here


DESCRIPTION

The hybrid vehicle control ECU controls the back-up lights.

WIRING DIAGRAM


E223766E04


INSPECTION PROCEDURE

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

1.CHECK FOR DTC (for HYBRID SYSTEM)

  1. Check for DTCs (Click here).

    OK:
    DTCs is not output.



NG
GO TO HYBRID CONTROL SYSTEM (Click here)
OK


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

  1. Disconnect the 1G and 1H No. 1 integration relay connectors.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    1G-14 (IG1) - Body ground
    		Power switch on (IG)
    		11 to 14 V
    1H-7 (BATT) - Body ground
    		Power switch off
    		11 to 14 V

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1G-22 (GND1) - Body ground
    		Always
    		Below 1 Ω
    1H-3 (GND2) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the 1G No. 1 integration relay connector.

  1. Disconnect the A19 power management control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1G-13 (BKUP) - A19-15 (BL)
    		Always
    		Below 1 Ω
    1G-13 (BKUP) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY - RELAY AND BODY GROUND)

  1. Disconnect the 1G No. 1 integration relay connector.

  1. Disconnect the V2 or V9 rear combination light assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1G-3 (BCK1) - V2-2 (B/ U)
    		Always
    		Below 1 Ω
    1G-3 (BCK1) - V9-2 (B/ U)
    		Always
    		Below 1 Ω
    1G-3 (BCK1) - Body ground
    		Always
    		10 kΩ or higher
    V2-3 (E) - Body ground
    		Always
    		Below 1 Ω
    V9-3 (E) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE NO.1 INTEGRATION RELAY

  1. Replace the No. 1 integration relay with a new or a known good one (Click here).

  1. Check that the back-up lights operate normally.

    OK:
    The back-up lights operate normally.



NG
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
OK

END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)