Inspection Procedure

1. Connect the Intelligent tester or Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the tester ON.
4. Enter the following menus:
   1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   2. Techstream - Select: Powertrain / Engine / Trouble Codes.
5. Read DTCs.

   Result 

   ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC U0101)
   
   

   Display (DTC output)	Proceed to
   U0101	A
   U0101 and other DTCs	B

   HINT:

   If any DTCs other than U0101 are output, troubleshoot those DTCs first.

B: GO TO  DIAGNOSTIC TROUBLE CODE CHART 

A: GO TO NEXT STEP 

1. Disconnect the A12 TCM connector.
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TCM - VOLTAGE
   
   

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

4. Disconnect the E5 TCM connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TCM - RESISTANCE
   
   

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

   Fig 1: Identifying Connector Terminal Of TCM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO TCM POWER SOURCE CIRCUIT  (See TCM POWER SOURCE CIRCUIT )

OK: GO TO NEXT STEP 

1. Disconnect the A13 ECM connector.
2. Disconnect the A12 TCM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open) 

   ECM - TCM (CHECK FOR OPEN)
   
   

   Tester Connection	Condition	Specified Condition
   A13-9 (CAN-) - A12-19 (CAN-)	Always	Below 1 Ω
   A13-10 (CAN+) - A12-18 (CAN+)	Always	Below 1 Ω

   Standard resistance (Check for short) 

   ECM - TCM (CHECK FOR SHORT)
   
   

   Tester Connection	Condition	Specified Condition
   A13-9 (CAN-) or A12-19 (CAN-) - Body ground	Always	10 kΩ or higher
   A13-10 (CAN+) - A12-18 (CAN+) - Body ground	Always	10 kΩ or higher

   Fig 2: Identifying Connector Terminal Of ECM And TCM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Replace the ECM (see REMOVAL ).

NEXT 

1. Connect the Intelligent tester or Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the tester ON.
3. Enter the following menus:
   1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   2. Techstream - Select: Powertrain / Engine / Trouble Codes.
4. Read DTCs.

   Result 

   RESULT CHART
   
   

   Display (DTC output)	Proceed to
   No output	A
   U0101	B

B: REPLACE TCM  (See REMOVAL )

A: GO TO NEXT STEP 

END