MIL Circuit [09/2015 - ]: Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result

   Condition	Proceed to
   MIL remains on	A
   MIL is not illuminated	B

Result:  B

B 

See step  5

Result:  A

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Check if DTCs have been stored (Refer to DTC CHECK / CLEAR [09/2015 - ] ). If DTCs are present, write them down.
4. Clear the DTCs (Refer to DTC CHECK / CLEAR [09/2015 - ] ).
5. Check that the MIL turns off.

   OK

   MIL turns off.

Result:  OK

OK 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2015 - 09/2016] Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2016 - ] )

Result:  NG

NG 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A14 ECM connector.
2. Turn the engine switch on (IG).
3. Check that the MIL is not illuminated.

   OK

   MIL is not illuminated.

Result:  OK

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2015 - ] )

Result:  NG

NG 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L10 combination meter connector.
2. Disconnect the A14 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
   L10-11 (EFI) - A14-11 (W)	Always	Below 1 Ω

   Standard resistance (check for short)

   Tester Connection	Condition	Specified Condition
   L10-11 (EFI) or A14-11 (W) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE NO. 1 METER ECU 

(Refer to REMOVAL [09/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check if the MIL is illuminated when turning the engine switch on (IG).

   OK

   MIL is illuminated.

Result:  OK

OK 

SYSTEM OK 

Result:  NG

NG 

See step  6

1. Turn the engine switch on (IG).
2. 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

B 

GO TO VC OUTPUT CIRCUIT 

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

Result:  A

A 

See step  7

1. See the combination meter troubleshooting procedure (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] ).

Result:  OK

OK 

CHECK AND REPAIR HARNESS OR CONNECTOR (COMBINATION METER - ECM) 

Result:  NG

NG 

REPLACE NO. 1 METER ECU 

(Refer to REMOVAL [09/2015 - ] )