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Diagnosis Procedure
1.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL
Check signal between electric motor switch harness connector and ground using an oscilloscope.
(+)(–)ConditionSignal
(Reference value)
Electric motor switch
ConnectorTerminal
M172GroundKeyless operation key battery is removed and brake pedal is depressedWhen a registered keyless operation key backside is contacted to electric motor switch0 V
Other than above
3When a registered keyless operation key backside is contacted to electric motor switch0 V
Other than above
Is the inspection result normal?
.
.
 
2.CHECK NATS ANTENNA AMP. COMMUNICATION SIGNAL CIRCUIT
  1. Turn the power supply mode of the electric motor switch to OFF.
  2. Disconnect keyless operation key unit connector and electric motor switch connector.
  3. Check continuity between electric motor switch harness connector and keyless operation key unit harness connector.
    Electric motor switchKeyless operation key unitContinuity
    ConnectorTerminalConnectorTerminal
    M172M18419Existed
    320
  4. Check continuity between Electric motor switch harness connector and ground.
    Electric motor switch—Continuity
    ConnectorTerminal
    M172GroundNot existed
    3
Is the inspection result normal?
.
Repair or replace harness.
 
3.REPLACE ELECTRIC MOTOR SWITCH
Replace electric motor switch. Refer to REMOVAL AND INSTALLATION.
Is the inspection result normal?
INSPECTION END
.
 
4.REPLACE KEYLESS OPERATION KEY UNIT
Replace keyless operation key unit. Refer to REMOVAL AND INSTALLATION.
: INSPECTION END