DESCRIPTION
The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM.
When the ignition switch is turned to ON, 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 ignition switch is turned to ON, 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 GTS.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following procedure.
When replacing the ECM, Perform ECM Initialization and Registration.
Click hereНажмите здесь
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
PROCEDURE
CHECK THAT MIL IS ILLUMINATED
Perform troubleshooting in accordance with the table below.
Result | ||||||
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B | Нажмите здесь |
A |
CHECK WHETHER MIL TURNS OFF
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Check if DTCs have been stored. If DTCs are present, write them down.
Powertrain > Engine and ECT > Trouble CodesClear the DTCs.
Powertrain > Engine and ECT > Clear DTCsCheck that the MIL turns off.
OK |
---|
MIL turns off. |
Result | |||
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|
OK |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
NG |
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)
Disconnect the A101 ECM connector.
*a |
Front view of wire harness connector (to ECM) |
Turn the ignition switch to ON.
Check that MIL is not illuminated.
OK |
---|
MIL is not illuminated. |
Result | |||
---|---|---|---|
|
OK |
REPLACE ECM Click hereНажмите здесь |
NG |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
Disconnect the ECM connector.
Disconnect the combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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|
Result | |||
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|
OK |
REPLACE COMBINATION METER ASSEMBLY For Hatchback, Wagon: Click hereНажмите здесь REPLACE COMBINATION METER ASSEMBLY For Sedan: Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK THAT MIL IS ILLUMINATED
Check if the MIL illuminates when the ignition switch is turned to ON.
OK |
---|
MIL is illuminated. |
Result | |||
---|---|---|---|
|
OK |
CHECK FOR INTERMITTENT PROBLEMS Click hereНажмите здесь |
NG |
CHECK THAT ENGINE STARTS
Start the engine.
Result | ||||||
---|---|---|---|---|---|---|
|
*: The GTS cannot communicate with the ECM.
B |
GO TO VC OUTPUT CIRCUIT Click hereНажмите здесь |
A |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)
Disconnect the ECM connector.
Disconnect the combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPAIR COMBINATION METER ASSEMBLY For Hatchback, Wagon: Click hereНажмите здесь REPAIR COMBINATION METER ASSEMBLY For Sedan: Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |