TROUBLESHOOTING [KEYLESS ENTRY SYSTEM]
S–131
S
TROUBLESHOOTING INDEX
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End Of Sie
NO. 1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE
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• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If
there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly
and undamaged.
Diagnostic procedure
Note
• For with theft-deterrent system, follow the procedure from Step 4.
No. TROUBLESHOOTING ITEM DESCRIPTION PAGE
1 One or more on-board
diagnostic functions inoperative.
• Malfunction in hazard warning light system
(except vehicle with theft-deterrent system), or
door lock linkage system, driver’s door key
cylinder switch system.
(See S–131 NO. 1 ONE OR
MORE ON-BOARD DIAGNOSTIC
FUNCTIONS INOPERATIVE)
2 All on-board diagnostic
functions inoperative.
• Malfunction in door lock timer unit power
supply circuit, door switch circuit, cargo
compartment light circuit or door lock timer
unit ground circuit.
(See S–132 NO. 2 ALL
ON-BOARD DIAGNOSTIC
FUNCTIONS INOPERATIVE)
3 Transmitter ID code cannot be
reprogrammed.
• Malfunction in transmitter battery, transmitter,
door lock timer unit bracket, door lock timer
unit bracket ground screw or door lock timer
unit circuit.
(See S–133 NO. 3
TRANSMITTER ID CODE
CANNOT BE REPROGRAMMED)
1 One or more on-board diagnostic functions inoperative
DESCRIPTION
• Malfunction in hazard warning light system, or door lock linkage system, driver’s door key cylinder
switch system.
POSSIBLE
CAUSE
• Malfunction in hazard warning light system
— Hazard warning light circuit
— Door lock timer unit malfunction
— Malfunction in wiring harness between door lock timer unit and flasher unit
• Malfunction in door lock linkage
• Malfunction in door lock timer unit door lock/unlock signal circuit
— Door lock timer unit malfunction
STEP INSPECTION ACTION
1 INSPECT HAZARD WARNING LIGHT
OPERATION DURING ON-BOARD
DIAGNOSIS
• Did hazard warning lights flash during on-
board diagnostic function operation?
Yes Go to Step 4.
No Go to next step.
2 INSPECT HAZARD WARNING LIGHT
CIRCUIT
• Do hazard warning lights flash when hazard
warning switch is on?
Yes Go to next step.
No Inspect hazard warning light circuit.
*3
CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (BETWEEN DOOR
LOCK TIMER UNIT AND FLASHER UNIT) OR
DOOR LOCK TIMER UNIT
• Measure voltage at door lock timer unit
connector terminal I (24 pin) during on-board
diagnostic function operation.
— When hazard warning light flashed:
B+⇔below 1.0 V
• Is voltage as above?
Yes Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.
No • Inspect wiring harness between door lock timer unit and
flasher unit.
— If wiring harness is OK, replace door lock timer unit
and reprogram transmitter ID code, then go to Step 7.
— If wiring harness malfunction, repair wiring harness,
then go to Step 7.
4 MAKE SURE THAT ALL DOORS LOCK AND
UNLOCK DURING ON-BOARD DIAGNOSIS
• Did all doors unlock and lock during on-
board diagnostic function operation?
Yes Recheck malfunction symptoms, then repeat from Step 1 if
malfunction reoccurs.
No Go to next step.
5 INSPECT DOOR LOCK LINKAGE
• Operate door lock knob and make sure door
locks and unlocks manually.
• Does every door lock system work?
Yes Go to next step.
No Inspect door lock linkage.
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