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Diagnosis Procedure
1.CHECK ELECTRIC MOTOR SWITCH SIGNAL OUTPUT VOLTAGE
  1. Electric motor switch to OFF.
  2. Disconnect electric motor switch connector.
  3. Check voltage between electric motor switch harness connector and ground.
    +-Voltage
    (Approx.)
    Electric motor switch
    ConnectorTerminal
    M178Ground12 V
Is the inspection result normal?
.
.
 
2.CHECK ELECTRIC MOTOR SWITCH SIGNAL CIRCUIT (OPEN)
  1. Disconnect Keyless operation key unit connector.
  2. Check continuity between electric motor switch harness connector and Keyless operation key unit harness connector.
    Electric motor switchKeyless operation key unitContinuity
    ConnectorTerminalConnectorTerminal
    M178M1849Existed
Is the inspection result normal?
Repair the harness or connector.
 
3.CHECK ELECTRIC MOTOR SWITCH SIGNAL CIRCUIT (SHORT TO GROUND)
Check continuity between electric motor switch harness connector and ground.
Electric motor switch—Continuity
ConnectorTerminal
M178GroundNot existed
Is the inspection result normal?
Replace Keyless operation key unit. Refer to Removal and Installation.
Repair the harness or connector.
 
4.CHECK ELECTRIC MOTOR SWITCH GROUND CIRCUIT (OPEN)
Check continuity between electric motor switch harness connector and ground.
Electric motor switch—Continuity
ConnectorTerminal
M171GroundExisted
Is the inspection result normal?
.
Repair the harness or connector.
 
5.CHECK ELECTRIC MOTOR SWITCH
Check electric motor switch. Refer to Component Inspection.
Is the inspection result normal?
INSPECTION END
Replace electric motor switch. Refer to Removal and Installation.