ECU Power Source Circuit: Procedure

1. Disconnect the TCM connector.
   Fig 1: Checking TCM (TCM - Body Ground)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B31-8 (E1) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to TCM)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the integration relay from the engine room relay block. Refer to ON-VEHICLE INSPECTION .
2. Disconnect the TCM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1B-4 - B31-18 (+B)	Always	Below 1 Ω
   1B-4 or B31-18 (+B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3