Inspection Procedure

Fig 1: Checking TCM (Power Source, Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A12 and E5 TCM connectors.
2. Turn the engine switch on (IG).
3. Measure the voltage of the wire harness side connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   A12-6 (+B) - E5-7 (E1)	Engine switch on (IG)	11 to 14 V

4. Turn the engine switch off.
5. Measure the resistance of the wire harness side connector.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   E5-7 (E1) - Body ground	Always	Below 1 Ω

NG: CHECK HARNESS AND CONNECTOR (TCM EFI MAIN NO. 2 RELAY, GROUND) 

OK: GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM / SFI SYSTEM)  (See ECM POWER SOURCE CIRCUIT )