NO.1 ON-BOARD DIAGNOSTIC FUNCTION INOPERATIVE [KEYLESS ENTRY SYSTEM]

id0903d2871600

•  When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing 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 harness are connected correctly and undamaged.

1

On-board diagnostic function inoperative
DESCRIPTION
Theft-deterrent control module"s on-board diagnostic function does not operate.
POSSIBLE CAUSE
•  Malfunction in door lock control module system
•  Malfunction in door lock linkage
•  Malfunction in power door lock system
•  Malfunction in theft-deterrent control module
•  Malfunction in theft-deterrent control module power supply circuit
•  Malfunction in theft-deterrent control module ground circuit
•  Malfunction in IG1, B+ signal circuit of keyless control module
―  keyless control module power supply fuse malfunction
―  Malfunction in wiring harness between keyless control module power supply fuse(s) and keyless control module itself
•  Malfunction in keyless control module"s door open/closed signal circuit
―  Door switch, keyless control module malfunction
•  Malfunction in keyless control module GND signal circuit
―  Malfunction in wiring harness between keyless control module and ground
―  Malfunction in wiring harness between keyless control module and door switch(es)
•   Malfunction in keyless control module door lock/unlock signal circuit
―  keyless control module malfunction
―  Malfunction in wiring harness between keyless control module and theft-deterrent control module

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT ON-BOARD DIAGNOSTIC FUNCTION OPERATION
•  Did any of the following items work during on-board diagnostic function operation?
―  All doors locked
―  Driver"s side door unlocked
―  All doors unlocked
Yes
Go to next step.
No
Go to Step 7.
2
INSPECT DOOR LOCK LINKAGE SYSTEM
•  Operate inner door lock knob and make sure door locks and unlocks manually.
•  Do all door"s lock systems work?
Yes
Go to next step.
No
Troubleshoot the door lock linkage.
3
CHECK TO SEE WHETHER MALFUNCTION IS IN DOOR LOCK CONTROL MODULE, DOOR LOCK ACTUATOR, A KEY CYLINDER SWITCH AND RELATED WIRING HARNESS, OR ELSEWHERE
•  Do all of the following items work when inserting ignition key into driver"s door key cylinder and operating ignition key?
―  All doors locked
―  All doors unlocked
Yes
Go to next step.
No
Inspect power door lock system, then go to step 15.
4
INSPECT POWER DOOR LOCK SYSTEM
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to LOCK.
•  Disconnect keyless control module connector.
•  Measure voltage at following keyless control module connector terminals.
―  Terminal O
―  Terminal K
•  Is voltage approximately 5 V?
Yes
Replace keyless control module and reprogram transmitter ID code, then go to Step 15.
No
Inspect theft-deterrent control module and wiring harness (between keyless control module terminal O, terminal K and theft-deterrent control module terminal Q)
5
INSPECT THEFT-DETERRENT CONTROL MODULE
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to LOCK position.
•  Disconnect theft-deterrent control module connector (24-pin)
•  Measure voltage at theft-deterrent control module connector (24-pin) terminal V.
•  Is resistance approximately 1.3 kilohm?
Yes
Go to next step.
No
Replace theft-deterrent control module, then go to Step 15.
6*
INSPECT WIRING HARNESS BETWEEN KEYLESS CONTROL MODULE AND THEFT-DETERRENT CONTROL MODULE FOR CONTINUITY AND SHORT
•  Disconnect keyless control module connector.
•  Inspect wiring harness between keyless control module connector terminal J and theft-deterrent control module connector (24-pin) terminal V.
•  Is there open circuit and/or short circuit at above wiring harness?
Yes
Repair wiring harness between keyless control module and theft-deterrent control module, then go to Step 15.
No
Replace keyless control module and reprogram transmitter ID code, then go to Step 15.
7
INSPECT KEYLESS CONTROL MODULE AND THEFT-DETERRENT CONTROL MODULE POWER SUPPLY FUSES
•  Are keyless control module and theft-deterrent control module power supply fuses okay?
Yes
Go to next step.
No
Check for a short to ground on blown fuse"s circuit. Repair or replace if necessary. Install appropriate amperage fuse.
8
INSPECT DOOR SWITCHES
•  Are door switches installed securely?
Yes
Go to next step.
No
Install door switch(es) securely, then go back to Step 2 of keyless entry system preliminary inspection.
9
INSPECT THEFT-DETERRENT CONTROL MODULE INSTALLATION
•  Is theft-deterrent control module installed to joint box securely?
Yes
Go to next step.
No
Install theft-deterrent control module securely, then go to Step 15.
10*
INSPECT WIRING HARNESS BETWEEN KEYLESS CONTROL MODULE POWER SUPPLIES AND KEYLESS CONTROL MODULE FOR CONTINUITY
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to ON position.
•  Measure voltage at following keyless control module terminals:
―  IG1 signal (Terminal A)
―  B+ signal (Terminal B)
•  Is voltage approximately 12 V?
Yes
Go to next step.
No
Repair wiring harness between fuse block and keyless control module, then go to Step 15.
11*
INSPECT WIRING HARNESS BETWEEN KEYLESS CONTROL MODULE POWER SUPPLY, KEYLESS CONTROL MODULE AND GROUND FOR SHORT TO B+
•  Disconnect keyless control module connector.
•  Measure voltage at following keyless control module connector terminal A.
•  Is voltage approximately 12 V?
Yes
Repair malfunctioning wiring harness, then go to Step 15.
No
Go to next step.
12*
INSPECT WIRING HARNESS BETWEEN KEYLESS CONTROL MODULE AND GROUND FOR CONTINUITY
•  Is there continuity between keyless control module connector terminal L and ground?
Yes
Go to next step.
No
Repair wiring harness between keyless control module and ground, then go to Step 15.
13*
INSPECT WIRING HARNESS BETWEEN KEYLESS CONTROL MODULE AND DOOR SWITCH FOR CONTINUITY AND SHORT
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to LOCK position.
•  Disconnect keyless control module connector.
•  Inspect wiring harness between keyless control module connector terminal C and door switch connector terminal.
•  Is there open circuit and/or short circuit at above wiring harness?
Yes
Repair wiring harness between keyless control module and door switch or replace malfunction door switch, then go to Step 15.
No
Go to next step.
14*
INSPECT THEFT-DETERRENT CONTROL MODULE POWER SUPPLY SYSTEM FOR CONTINUITY AND SHORT
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to LOCK position.
•  Remove theft-deterrent control module from joint box.
•  Turn ignition (F2, G6)/engine (WE-C, WL-3, WL-C, WLT-1, WLT-2) switch to ON position.
•  Measure voltage at following theft-deterrent control module (16-pin) terminals.
―  Terminal C
•  Is voltage approximately 12 V?
Yes
Go to next step.
No
Replace keyless control module and reprogram transmitter ID code, then go to next step.
15
CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
•  Does keyless entry system operate properly?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.