SWS ± Troubleshooting
54B-22
Inspection Procedure E-1
Keyless entry system: Keyless entry system does not
operate.
Probable cause
The cause may be a malfunction of the receiver and transmitter communication
system
D Malfunction of transmitter
D Malfunction of ETACS-ECU
OK
Replace the ETACS-ECU.
Is the central door locking system operated normally?
No
Check the central door locking system. (Refer to P54B-11, Trouble
Symptom Chart.)
Yes
MUT-II input signal check
D Transmitter
NG
Check the transmitter input circuit. (Refer to P.54B-46, Inspection
Procedure N-17.)
Inspection Procedure E-2
Keyless entry system: The room lamp and hazard warning
lamps do not operate through the answerback function.
Probable cause
The hazard warning lamp answerback function can be selected by the driver's
desire (can be deactivated). However, the room lamp answerback function can
not be deactivated. if all of these device do not operate through the
answerback function, the ETACS-ECU may be defective.
D Malfunction of turn-signal lamp
D Malfunction of room lamp
D Malfunction of ETACS-ECU
D Malfunction of harness wire or connector
Activate the answerback functions. (Refer to GROUP 42 ± Keyless
Entry System.)
Check trouble symptoms.
NG
Are room lamp and hazard warning lamps operated normally?
No
Check the defective device. (Refer to P.54B-11, Trouble Symptom
Chart.)
Yes
Replace the ETACS-ECU.
Inspection Procedure E-3
Keyless entry system: The encrypted code cannot be
registered.
Probable cause
The ETACS-ECU actives the encrypted code register mode according to the
following switch signals.
D Key reminder switch
D Hazard warning lamp switch
If the encrypted code register mode is not set, the relevant input signal circuit
or the ETACS-ECU may be defective.
If a transmitter can not be registered although the encrypted code register
mode is set, the transmitter or the ETACS-ECU may be defective.
D Malfunction of key reminder switch
D Malfunction of hazard warning lamp switch
D Malfunction of transmitter
D Malfunction of ETACS-ECU
D Malfunction of harness wire or connector
OK
Replace the ETACS-ECU.
Is encrypted code register mode set?
Yes
Check the transmitter battery. (Refer to GROUP 42 ± Keyless
entry System.)
No
MUT-II input signal check
D Key reminder switch
D Hazard warning lamp switch
NG
Check the defective input circuit. (Refer to P.54B-13, Defects Found
by input Signal Check.)
NG
Repair
OK
Replace the transmitter.
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