ECD SYSTEM (w/o EGR Cooler Bypass Valve) MIL Circuit

DESCRIPTION

If the ECM detects a malfunction, the MIL illuminates. The ECM then records the DTC in its memory.

WIRING DIAGRAM

A01KHNEE01

INSPECTION PROCEDURE

Note

If the ECM is replaced, the new ECM needs initialization Click here.

PROCEDURE

CHECK MIL

Tech Tips

Use the table below to troubleshoot each problem symptom.

Reference

Condition	Proceed to
MIL remains ON	A
MIL is not illuminated	B

B

CHECK IF MIL ILLUMINATES Click here

A

CHECK IF MIL TURNS OFF
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: Powertrain / Engine and ECT / DTC.
4. Check if DTCs have been stored. Take notes if there are DTCs.
5. Select the following menu items: Powertrain / Engine and ECT / DTC / Clear.
6. Clear the DTC(s) Click here.
7. Check if the MIL turns OFF.
  
  OK
  
  MIL turns OFF.
OK
GO TO DTC CHART

NG
CHECK HARNESS AND CONNECTOR
1. Text in Illustration
  
  *1 ECM Connector
  
  Disconnect the E7 ECM connector.
2. Turn the ignition switch ON.
3. Check that the MIL does not illuminate.
  
  OK
  
  MIL does not illuminate.
4. Reconnect the ECM connector.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE ECM
CHECK IF MIL ILLUMINATES
1. Check if the MIL illuminates when the ignition switch is turned ON.
  
  OK
  
  MIL illuminates.
OK
END

NG

CHECK THAT ENGINE STARTS

Turn the ignition switch ON.

Start the engine.

Result

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

Tech Tips

*: The intelligent tester cannot communicate with the ECM.

B

GO TO VC OUTPUT CIRCUIT Click here

A

CHECK COMBINATION METER ASSEMBLY (MIL CIRCUIT)

OK

Combination meter circuit is normal.

NG
REPAIR OR REPLACE COMBINATION METER ASSEMBLY

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)