Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT REFERENCE
   
   

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

B:  Go to step  5

A: Go to Next Step 

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 (see DTC CHECK/CLEAR ). If DTCs are present, write them down.
4. Clear the DTCs (see DTC CHECK/CLEAR ).
5. Check that the MIL turns off.

   OK: 

   MIL turns off. 

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS  (See DIAGNOSTIC TROUBLE CODE CHART )

NG: Go to Next Step 

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. 

Fig 1: Identifying A14 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM  (See REMOVAL )

NG: Go to Next Step 

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) 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L10-11 (EFI) - A14-11 (W)	Always	Below 1 Ω

   Standard resistance (check for short) 

   STANDARD RESISTANCE SPECIFICATION
   
   

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

Fig 2: Identifying L10 Combination Meter And A14 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE COMBINATION METER  (See REMOVAL )

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

   OK: 

   MIL is illuminated. 

OK: SYSTEM OK 

NG: Go to Next Step 

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

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Engine starts	A
   Engine does not start*	B
   HINT: *: The Techstream cannot communicate with the ECM.

B: GO TO VC OUTPUT CIRCUIT  (See VC OUTPUT CIRCUIT )

A: Go to Next Step 

1. See the combination meter troubleshooting procedure (see HOW TO PROCEED WITH TROUBLESHOOTING ).

NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL )

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