POWER DOOR LOCK CONTROL SYSTEM Only Rear Door LH LOCK / UNLOCK Functions do not Operate

DESCRIPTION

The main body ECU (instrument panel junction block) receives lock/unlock switch signals and activates the door lock motor according to these signals.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   INSPECT REAR DOOR LOCK ASSEMBLY

   
   
   1. 

      Remove the rear door lock assembly LH (Click here).

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

      Standard resistance
      Tester Connection Measurement Condition Door Lock Condition Specified Condition 6 - 9 Battery positive (+) → Terminal 4 Battery negative (-) → Terminal 1 Locked 10 kΩ or higher 6 - 9 Battery positive (+) → Terminal 1 Battery negative (-) → Terminal 4 Unlocked Below 1 Ω

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK MOTOR CIRCUIT)

   
   
   1. 

      Disconnect the instrument panel junction block connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition K4-1 (UL) - 1P-6 Always Below 1 Ω K4-4 (L) - 1P-11 Always Below 1 Ω K4-1 (UL) - Body ground Always 10 kΩ or higher K4-4 (L) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
3. Click here

   REPLACE REAR DOOR LOCK ASSEMBLYClick here

4. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

6. Click here

   CHECK HARNESS AND CONNECTOR (DOOR UNLOCK DETECTION SWITCH CIRCUIT)

   
   
   1. 

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

      Standard resistance
      Tester Connection Condition Specified Condition K4-6 (LSSR) - 1P-5 Always Below 1 Ω K4-6 (LSSR) - Body ground Always 10 kΩ or higher K4-9 (E) - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here