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GENERAL DESCRIPTION

The Malfunction Indicator Lamp (MIL), which is located in the instrument cluster, comes on to notify the driver that there may be a problem with the vehicle and that service is needed. Immediately after the ignition switch turns on, the malfunction indicator lamp is lit to indicate that the MIL operates normally and goes off after starting.

DTC DESCRIPTION

Checking input signal of engine check lamp every 10 sec. under detecting condition, if open, or short to battery or ground is detected for more than 5 sec., PCM sets P0650.

DTC DETECTING CONDITION

Item	Detecting Condition	Possible cause
DTC Strategy	● Signal low, high	● Poor connection ● Open or short in MIL circuit ● Faulty MIL ● Faulty PCM
Enable Conditions	● After 0.5 sec under conditions below ● Engine works ● 11V ≤ Battery voltage ≤ 16V
Threshold value	● Open or short
Diagnosis Time	● Continuous (More than 5 seconds failure for every 10 seconds test)
MIL On Condition	● DTC only (NO MIL ON)

SCHEMATIC DIAGRAM

MONITOR DTC STATUS

Check DTC Status

(1)

Connect scantool to Data Link Connector(DLC).

(2)

IG "ON".

(3)

Select "Diagnostic Trouble Codes(DTCs)" mode, and then Press F4(DTAL) to check DTC's information from the DTCs menu

(4)

Read "DTC Status" parameter.

(5)

Is parameter displayed "Present fault"?

▶ Go to "Terminal and connector inspection" procedure.

▶ Fault is intermittent caused by poor contact in the sensor’s and/or PCM’s connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.

TERMINAL AND CONNECTOR INSPECTION

Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

▶ Go to " Power Circuit Inspection " procedure.

POWER CIRCUIT INSPECTION

IG "OFF" and disconnect Instrument cluster connector.

IG "ON" and ENG "OFF"

Measure voltage between terminal 5 of instrument cluster harness connector and chassis ground.

Specification : Approx. B+

Is the measured voltage within specification?

▶ Go to "Control Circuit Inspection" procedure.

▶ Check fuse between battery and instrument cluster for open or blown-off.

▶ Repair open or short to ground in harness, and go to "Verification of Vehicle Repair" procedure.

CONTROL CIRCUIT INSPECTION

IG "OFF" and disconnect PCM connector.

IG "ON" and ENG "OFF"

Measure voltage between 63 of PCM harness connector and chassis ground.

Specification : Approx. B+

Is the measured voltage within specification?

▶ Go to "Component Inspection" procedure.

▶ Check open in Engine warning lamp's filament.

▶ Repair open or short to ground in harness, and go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION

Check instrument cluster

(1)

IG "OFF"

(2)

Substitute with a known - good instrument cluster and check for proper operation.

(3)

Does it normally operate after replacement?

▶ Replace instrument cluster and go to "Verification of Vehicle Repair" procedure.

▶ Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.

note

There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others

VERIFICATION OF VEHICLE REPAIR

After a repair, it is essential to verify that the fault has been corrected.

Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode

Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions

Read "DTC Status" parameter

Is parameter displayed "History(Not Present) fault"?

▶ System performing to specification at this time. Clear the DTC.

▶ Go to the applicable troubleshooting procedure.