DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK THAT MIL IS ILLUMINATED
CHECK WHETHER MIL TURNS OFF
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
CHECK THAT MIL IS ILLUMINATED
CHECK THAT ENGINE STARTS
CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
SFI SYSTEM - MIL Circuit
DESCRIPTION
The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunction detections by the ECM. When the engine switch is turned on (IG), power is supplied to the MIL circuit, and the ECM provides the circuit ground which illuminates the MIL.
The MIL operation can be checked visually: When the engine switch is first turned on (IG), the MIL should be illuminated and should then turn off when the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the intelligent tester.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK THAT MIL IS ILLUMINATED |
Perform troubleshooting in accordance with the table below.
Result| Result | Proceed to |
| MIL remains ON | A |
| MIL does not illuminate | B |
| 2.CHECK WHETHER MIL TURNS OFF |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Check if any DTCs are output. Note down any DTCs.
Check if the MIL goes off.
| OK | |
| |
| REPAIR CIRCUITS INDICATED BY OUTPUT DTCS ()
|
|
| 3.CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS) |
Disconnect the A38 ECM connector.
Turn the engine switch on (IG).
Check that the MIL is not illuminated.
- OK:
- MIL is not illuminated.
| 4.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM) |
Disconnect the A38 ECM connector.
Disconnect the E8 combination meter connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A38-24 (W) or E8-12 (CHK) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE COMBINATION METER ASSEMBLY ()
|
|
| 5.CHECK THAT MIL IS ILLUMINATED |
Check if the MIL is illuminated when the engine switch is turned on (IG).
| 6.CHECK THAT ENGINE STARTS |
Turn the engine switch on (IG).
Start the engine.
Result| Result | Proceed to |
| Engine starts | A |
| Engine does not start* | B |
- *: The intelligent tester cannot communicate with the ECM.
| | GO TO VC OUTPUT CIRCUIT ()
|
|
|
| 7.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM) |
Disconnect the A38 ECM connector.
Disconnect the E8 combination meter connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A38-24 (W) - E8-12 (CHK) | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE COMBINATION METER ASSEMBLY ()
|
|
