Diagnosis Procedure
1.
CHECK HARNESS AND CONNECTOR INSTALLATION CONDITION
Check harness connector installation condition of the following items.
ECM
EGR volume control valve
Is the inspection result normal?
.
Repair or replace error-detected parts.
2.
CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-1
Turn ignition switch OFF.
Disconnect ECM harness connector and EGR volume control valve harness connector.
Check the continuity between ECM harness connector and EGR volume control valve harness connector.
ECM
EGR volume control valve
Continuity
Connector
Terminal
Connector
Terminal
F51
13
F81
6
Existed
14
5
Also check harness for short to power and short to ground.
Is the inspection result normal?
.
Repair or replace error-detected parts.
3.
CHECK EGR VOLUME CONTROL VALVE POWER SUPPLY CIRCUIT-2
Check the continuity between ECM harness connector and EGR volume control valve harness connector.
ECM
EGR volume control valve
Continuity
Connector
Terminal
Connector
Terminal
F52
116
F81
1
Existed
Also check harness for short to power and short to ground.
Is the inspection result normal?
.
Repair or replace error-detected parts.
4.
CHECK EGR VOLUME CONTROL VALVE
Check the EGR volume control valve. Refer to Component Inspection
Component Inspection (EGR Volume Control Valve)
.
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent Incident
Intermittent Incident
.
Replace EGR volume control valve.