Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT REFERENCE
   
   

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

B: Go to step  4

A: Go to next step 

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester ON.
4. Check whether any DTCs have been stored (See DTC CHECK/CLEAR  ). Note them down if necessary.
5. Clear DTCs (See DTC CHECK/CLEAR  ).
6. Check if the MIL turns off.

   OK: MIL should turn off. 

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

NG: Go to next step 

1. Disconnect the E46 ECM connector.
Fig 1: Identifying E46 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Check that MIL is not illuminated.

   OK: MIL is not illuminated. 

4. Reconnect the ECM connector.

OK: REPLACE ECM  (See REMOVAL  )

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

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

   OK: MIL should be illuminated. 

OK: END 

NG: Go to next step 

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

   Result 

   RESULT CHART
   
   

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

B: GO TO  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 BULB OR COMBINATION METER ASSEMBLY 

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