MIL Circuit [09/2014 - 10/2015]: Procedure

1. Turn the engine switch on (IG).
2. Check the illumination of the MIL.

   Result

   Result	Proceed to
   MIL remains illuminated (Even after engine switch is turned to on (IG) and several seconds have passed, MIL still remains illuminated)	A
   MIL remains off (Does not illuminate at all)	B
   MIL illuminates for several seconds, but turns off after engine is started	C

Result: 

B 

See step  5

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2014 - 10/2015] )

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Check if any DTCs have been stored. Note any DTCs.
6. Clear the DTCs (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ).
7. Check if the MIL goes off.

   Result

   Result	Proceed to
   MIL goes off	A
   MIL does not go off	B

Result: 

A 

REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] )

Result: 

B 

See step  3

1. Disconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the engine switch on (IG).
3. Check if the MIL is illuminated.

   Result

   Result	Proceed to
   MIL is not illuminated	A
   MIL is illuminated	B

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to ECM)

4. Reconnect the ECM connector.

Result: 

A 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

B 

See step  4

1. Disconnect the combination meter assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   N40-5 (CHK) or A19-11 (W) - Body ground	Always	10 kΩ or higher

4. Reconnect the combination meter assembly connector.
5. Reconnect the ECM connector.

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ASSEMBLY - ECM) 

1. Start the engine.

   Result

   Result	Proceed to
   Engine starts	A
   Engine does not start*	B

   HINT: 

   *: The Techstream cannot communicate with the ECM.

Result: 

B 

GO TO VC OUTPUT CIRCUIT 

(Refer to VC Output Circuit [09/2014 - 10/2015] )

Result: 

A 

See step  6

1. Disconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A19-11 (W) - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to ECM)

4. Reconnect the ECM connector.

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

See step  7

1. Disconnect the combination meter assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   N40-5 (CHK) - A19-11 (W)	Always	Below 1 Ω

4. Reconnect the ECM connector.
5. Reconnect the combination meter assembly connector.

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ASSEMBLY - ECM)