Inspection Procedure

1. Connect the intelligent tester or OBD II scan tool to the DLC3.
2. Turn the ignition switch ON and push the intelligent tester or the OBD II scan tool main switch ON.
3. Read the DTC.
4. Clear the DTC (See DTC CHECK / CLEAR  ).
5. Check that the MIL is not illuminated.

OK : 

MIL is not illuminated. 

OK : REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

NG : Go to next step 

1. Disconnect the E5 ECM connector.
2. Turn the ignition switch ON.
3. Check that the MIL is not illuminated.

OK : 

MIL is not illuminated. 

Fig 1: Checking Harness And Connector (Check For Short In Wire Harness)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE ECM 

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

1. Check that the MIL is illuminated when turning the engine switch ON.

Standard: 

MIL is illuminated. 

OK : SYSTEM OK 

NG : Go to next step 

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

NG : REPAIR OR REPLACE BULB OR COMBINATION METER 

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