Inspection Procedure

1. Perform troubleshooting in accordance with the table below.
   TROUBLESHOOTING REFERENCE AND INFORMATION
   
   

   Condition	Proceed to
   MIL remains ON	A
   MIL does not illuminate	B

B: Go to step   5 

A: Go TO NEXT STEP. 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
4. Check if any DTCs have been stored. Note down any DTCs.
5. Clear DTCs (see DTC CHECK / CLEAR ).
6. Check if the MIL goes off.

   Standard: MIL should go off. 

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

NG: Go TO NEXT STEP. 

1. Disconnect the A9 ECM connector.
   Fig 1: Identifying A9 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Check that the MIL is not illuminated.

   OK: MIL is not illuminated. 

4. Reconnect the ECM connector.

OK: REPLACE ECM 

NG: Go TO NEXT STEP. 

1. Disconnect the A9 ECM connector.
2. Disconnect the E19 combination meter connector.
3. Measure the resistance.

   Standard resistance 

   CONNECTOR TERMINALS RESISTANCE REFERENCE AND CONDITION
   
   

   Tester Connection	Specified Condition
   A9-24 (W) or E19-8 (EFI) - Body ground	10 kΩ or higher

   Fig 2: Identifying E19 Combination Meter & A9 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the ECM connector.
5. Reconnect the combination meter connector.

OK: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

1. Check if the MIL is illuminated when the ignition switch is turned ON.

   OK: MIL should be illuminated. 

OK: SYSTEM OK 

NG: Go TO NEXT STEP. 

1. Turn the ignition switch ON.
2. Start the engine.
   RESULT REFERENCE
   
   

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

   HINT:

   *: The intelligent tester cannot communicate with the ECM.

B: GO TO  VC OUTPUT CIRCUIT  

A: Go TO NEXT STEP. 

1. Check the MIL circuit, refer to the appropriate table:

   -PROBLEM SYMPTOMS TABLE (2005/11-2006/01)

   -PROBLEM SYMPTOMS TABLE (2006/01- )

NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 

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