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Diagnosis Procedure
1.CHECK IGNITION RELAY-3 CONTROL SIGNAL VOLTAGE
  1. Ignition switch OFF.
  2. Disconnect BCM connector.
  3. Check voltage between BCM harness connector and ground.
    +-Voltage
    BCM
    ConnectorTerminal
    M1840Ground9 – 16 V
Is the inspection result normal?
Replace BCM. Refer to Removal and Installation.
 
2.CHECK IGNITION RELAY-3 CONTROL SIGNAL CIRCUIT (OPEN)
  1. Remove ignition relay-3.
  2. Check continuity between BCM harness connector and ignition relay-3 harness connector.
    BCMIgnition relay-3Continuity
    ConnectorTerminalConnectorTerminal
    M1840E832Existed
Is the inspection result normal?
Repair the harness or connector.
 
3.CHECK IGNITION RELAY-3 CONTROL SIGNAL CIRCUIT (SHORT TO GROUND)
Check continuity between BCM harness connector and ground.
BCM—Continuity
ConnectorTerminal
M1840GroundNot existed
Is the inspection result normal?
Repair the harness or connector.
 
4.CHECK IGNITION RELAY-3
Check ignition relay-3. Refer to Component Inspection.
Is the inspection result normal?
INSPECTION END
Replace ignition relay-3.