3.
Is the problem found?
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
▶ Go to "Control Circuit Inspection".
As monitoring the errors of several sensors and actuator circuit, TCM related problem and ECM error, if any problem occurs, ECM turns Engine Check Lamp ON at cluster to notify driver the occurence of a problem.Generally, Engine Check Lamp turns ON at Ignition ON and turns OFF within couple of seconds after turning engine ON. If engine check lamp turns on during driving, perform diagnosis of engine system and auto-transaxle system.
P0650 is set when 1)excessive current is detected in engine check lamp control circuit for more than 1.0 sec. at engine check lamp ON condition or 2)like open or short to ground, no current is detected. This code is due to open in control circuit or opened filament of lamp component.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Voltage monitoring | ● Open in engine check lamp ● Engine check lamp circuit. | ||
Enable Conditions | ● IG KEY "ON" (Monitoring only performed within lamp operating condition) | |||
ThresholdValue | ● Short to battery ● Short to GND, Wiring open | |||
DiagnosticTime | ● 1.0 sec. | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
MIL | NO | |||
Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damge of component.
Perform checking procedure as follows.
Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.
Check connecting condition of ECM and component connector : Check terminal seperation, damage of locking device and connecting condition between terminal and wiring.
Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition. ( after checking, reconnect the pin at correct position. )
Is the problem found?
▶ Repair the trouble causing part and go to "Verification of Vehicle Repair".
▶ Go to "Control Circuit Inspection".
Check control circuit voltage
IG KEY "OFF", ENGINE "OFF".
Disconnect ECM connector.
IG KEY "ON".
Measure the voltage of terminal 68 of ECM connector.
Specification : 10.8V~13.0V
Is the measured voltage within the specification?
▶ Go to "2. Grounding test of check lamp control circuit" as follows.
▶ Check open in filament of check lamp. ( Refer to Component Inspection)
▶ Repair open between cluster connector(M07-1) terminal 1 and ECM connector(C201-2) terminal 68 and go to "Verification of Vehicle Repair",
Grounding test of check lamp control circuit
IG KEY "OFF", ENGINE "OFF".
Disconnect ECM connector.
IG KEY "ON".
Ground ECM connector terminal 68 to chassis ground.
specification : check lamp turns ON.
Does check lamp turn ON?
▶ Go to "Verification of Vehicle Repair".
▶ Repair short to battery in check lamp control circuit and go to "Verification of Vehicle Repair".
IG KEY "OFF", ENGINE "OFF".
Dismount cluster and disconnect check lamp.
Check filament of check lamp.
supply 12V to "check lamp" to turn lamp ON
specification : lamp turns ON when 12V is supplied.
Does check lamp turn ON?
▶ Go to "Verification of Vehicle Repair".
▶ Replace check lamp and go to "Verification of Vehicle Repair".
After a repair, it is essential to verify that the fault is corrected.
After connecting Scantool select "DIAGNOSTIC TROUBLE CODES(DTCs)" mode.
Clear recorded DTC using Scantool.
Drive the vehicle within DTC "Enable conditions" in "General information".
After selecting "DIAGNOSTIC TROUBLE CODES(DTCs)" mode and check if DTC is recorded again.
Are any DTCs recorded ?
▶ Go to the DTC guide of recorded NO. in Scantool.
▶ System operates within specification.
