Inspection Procedure

CHECK THAT MIL IS ILLUMINATED

Perform troubleshooting in accordance with the chart below.

Result

RESULT REFERENCE

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

B: Go to step 4

A: Go to Next Step

CHECK WHETHER MIL TURNS OFF
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream 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.
  
  NG: Go to step 3
  
  OK: REPAIR CIRCUIT INDICATED BY OUTPUT DTC (See DIAGNOSTIC TROUBLE CODE CHART )
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the ECM connector.
2. Turn the ignition switch to ON.
3. Check that MIL is not illuminated.
  OK:
  
  MIL is not illuminated.
4. Reconnect the ECM connector.
  NG: CHECK AND REPAIR HARNESS OR CONNECTOR (COMBINATION METER ECM)
  
  Fig 1: Identifying E13 ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: REPLACE ECM (See ECM )
CHECK THAT MIL IS ILLUMINATED
1. Check if the MIL is illuminated when the ignition switch is turns ON.
  OK:
  
  MIL should be illuminated.
  
  NG: Go to step 5
  
  OK: END

CHECK THAT ENGINE STARTS

Turn the ignition switch to ON.

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

A: Go to Next Step

INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)
1. See the combination meter troubleshooting procedure (See INSTALLATION ).
  NG: REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY
  
  OK: CHECK AND REPAIR HARNESS OR CONNECTOR (COMBINATION METER - ECM)