LIGHTING SYSTEM Back-up Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

   2. 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.

   2. Disconnect the A19 power management control ECU connector.

   3. 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.

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

   3. 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.

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

      OK
      The back-up lights operate normally.

   
   

   OK

   END (NO. 1 INTEGRATION RELAY WAS DEFECTIVE)

   NG

   REPLACE POWER MANAGEMENT CONTROL ECU Click here