NO.1 KEYLESS ENTRY SYSTEM DOES NOT OPERATE NORMALLY [KEYLESS ENTRY SYSTEM]

id0903d2832300

• When performing an asterisked (*) troubleshooting inspection, slightly 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, verify that the connectors, terminals and wiring harnesses are connected correctly and undamaged.

1 | Keyless entry system does not operate normally
DESCRIPTION | • Malfunction in door lock linkage system, or BCM
POSSIBLE CAUSE | • Malfunction in BCM power supply ― Open circuit in IG1 and/or B+ power supply circuit ― Open or short circuit in ground circuit ― BCM malfunction • Malfunction in keyless switch related circuit ― Keyless switch malfunction • Malfunction in door switch signal circuit ― Open or short circuit in wiring between BCM and door switch ― Door switch malfunction • Malfunction in door lock/unlock signal circuit ― Door lock actuator malfunction ― Open or short circuit in wiring between BCM and door lock actuator • Malfunction in turn light signal circuit ― BCM malfunction ― Open or short circuit wiring between BCM and each turn signal light

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT FOR MALFUNCTION IN BCM POWER SUPPLY CIRCUIT OR ELSEWHERE • Did any of the following items operate during the KEYLESS ENTRY SYSTEM OPERATION INSPECTION? ― All doors lock/unlock ― Hazard wiring light flashes | Yes | Go to the next step.
No | Inspect the connection of the BCM connectors, and go to Step 4.
2 | INSPECT FOR MALFUNCTION IN KEYLESS SWITCH OR ELSEWHERE • Did the following item operate during the KEYLESS ENTRY SYSTEM OPERATION INSPECTION? ― All doors lock/unlock | Yes | Go to the next step.
No | Go to Step 7.
3 | INSPECT FOR MALFUNCTION IN DOOR LOCK ACTUATOR OR ELSEWHERE • Did the following item operate during the KEYLESS ENTRY SYSTEM OPERATION INSPECTION? ― Hazard warning light flashes | Yes | Go to the next step.
No | Go to Step 8.
*4 | INSPECT BCM POWER SUPPLY CIRCUIT • Are the BCM power supply and voltage normal? ― IG1 signal (terminal 4A) ― B+ signal (terminal 2B, 2P) | Yes | Go to the next step.
No | • Inspect for burnt fuse. • Inspect the power supply system wiring harness for an open or short circuit.
*5 | INSPECT BCM GROUND CIRCUIT • Is the BCM ground voltage normal? ― 0V (terminal 2G, 2N) | Yes | Go to the next step.
No | Inspect the ground system wiring harness for open circuit.
*6 | INSPECT DOOR SWITCH SIGNAL VOLTAGE • Are the wiring harness between the BCM and each door switch normal? ― Inspect each terminal (6M, 6O, 6R, 6Q) under the following conditions. • Door closed: B+ • Door open: 2.0V or less | Yes | Go to the next step.
No | • Inspect the door switch. • Inspect the door switch system wiring harness for a short circuit.
7 | INSPECT KEYLESS SWITCH • Is the keyless switch normal? | Yes | Replace the BCM.
No | Replace the keyless switch.
*8 | INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, BCM GROUND CIRCUIT OR ELSEWHERE • Measure the voltage at the BCM terminals 5I, 2H, 7D, 5E, 2L and 7G while operating the transmitter. ― Lock driver-side door with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 5I) ― Lock passenger-side door with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 2H) ― Lock all rear doors and liftgate with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 7D) ― Unlock driver-side door with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 5E) ― Unlock passenger-side door with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 2L) ― Unlock all rear doors and liftgate with the transmitter: 1.0 V or less → B+→ 1.0 V or less (terminal 7G) • Is the voltage as above? | Yes | Go to the next step.
No | • Inspect the wiring harness between BCM and the door lock actuator for an open or short circuit. • Inspect the door lock actuator.
9 | INSPECT DOOR LOCK LINKAGE • Operate the door lock knob and verify the door locks and unlock manually. • Does every door lock system work? | Yes | Go to the next step.
No | Inspect the door lock linkage.
*10 | INSPECT TURN LIGHT SIGNAL CIRCUIT • Measure voltage at the BCM terminals 1I, 6A, 1G (right side turn signal), 3Y, 6C and 1F (left side turn signal) while operating hazard and/or turn signal on. • Are the terminal voltages are alternated between 1.0V or less and B+? | Yes | Verify the malfunction symptom again.
No | • Inspect the wiring harnesses between the BCM and each turn light for a short circuit. • Inspect each turn light. • If these items are normal, replace the BCM.