Driver Side Junction Block ECU Power Source Circuit: Procedure

1. Remove the TRK OPN fuse from the main body ECU LH.
2. Remove the MPX-B fuse from the engine room No. 1 relay block.
3. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

Fig 1: Checking Wire Harness (Main Body ECU LH - Battery And Body Ground)

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1. Disconnect the PM, PL, PA and PD ECU connectors.
2. Measure the voltage and resistance of the wire harness side connectors.

   Standard voltage

   Standard resistance 

   Tester Connection	Specified Condition
   PM-1 (FUEL) - Body ground	10 to 14 V
   PL-1 (MPXB) - Body ground	10 to 14 V

   Tester Connection	Specified Condition
   PA-14 (GND) - Body ground	Below 1 Ω
   PD-7 (SGND) - Body ground	Below 1 Ω
   PD-8 (SGND) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE