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

• 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 key reminder switch related circuit ― Key reminder switch malfunction • Malfunction in door latcu switch signal circuit ― Open or short circuit in wiring between BCM and door latcu switch ― Door latcu 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

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 KEY REMINDER 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 9.
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 11.
*4	INSPECT BCM POWER SUPPLY CIRCUIT • Are the BCM power supply and voltage normal? ― IG1 signal (terminal 3AB, 4A) ― B+ signal (terminal 2D, 2J, 4B, 4C)	Yes	Go to the next step.
No	• Inspect for burnt fuse. • Inspect the power supply system wiring harness for an open or short circuit. • Then go to Step 14.
*5	INSPECT BCM GROUND CIRCUIT • Is the BCM ground voltage normal? ― 0V (terminal 1V, 2A)	Yes	Go to the next step.
No	Inspect the ground system wiring harness for open circuit. Then go to Step 14.
*6	INSPECT door latcu switch SIGNAL • Monitor following BCM (door latcu switch) PID using the M-MDS. ― TR/LG_SW (Trunk lid/liftgate latch switch) ― DRSW_P (Passenger’s door latch switch) ― DRSW_D (Driver’s door latcu switch) • Are monitored PID values normal?	Yes	Go to the next step.
No	• Inspect for open or short circuit in wiring harness between BCM and suspected door latch/trunk lid (4SD)/liftgate (5HB) latch switch. ― If wiring harness is normal, inspect suspect door latch/trunk lid (4SD)/liftgate (5HB) latch switch. (See FRONT DOOR LATCH SWITCH INSPECTION.) (See REAR DOOR LATCH SWITCH INSPECTION.) (See TRUNK LID LATCH SWITCH INSPECTION.) (See LIFTGATE LATCH SWITCH INSPECTION.) ― If wiring harness malfunction, repair or replace wiring harness, then go to Step 14.
*7	INSPECT DOOR LATCU SWITCH SIGNAL VOLTAGE • Are the wiring harness between the BCM and each door latch switch normal? ― Inspect each terminal (8B, 8D, 8F, 8H) under the following conditions. • Door/trunk/liftgate closed : B+ • Door/trunk/liftgate open: 2.0V or less	Yes	Go to the next step.
No	• Inspect the door latcu switch. • Inspect the door latcu switch system wiring harness for a short circuit. • Then go to Step 14.
8	INSPECT KEY REMINDER SWITCH • Is the key reminder switch normal? ON: 12V OFF: 0V	Yes	Replace the BCM.
No	Replace the key reminder switch, then go to Step 14.
*9	INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, BCM GROUND CIRCUIT OR ELSEWHERE • Measure the voltage at the BCM terminals 7I, 7M and 7K while operating the transmitter. ― All doors locked: 1.0 V or less → B+→ 1.0 V or less (Normal lock : 7I terminal)(Double lock : 7M terminal) ― All doors unlocked : 1.0 V or less → B+→ 1.0 V or less (7K terminal) • 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. • Then go to Step 14.
10	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 step 12.
No	Inspect the door lock linkage then go to Step 14.
*11	INSPECT FOR MALFUNCTION IN THEFT-DETERRENT SYSTEM OR ELSEWHERE • Is the theft-deterrent system equipped?	Yes	Go to the next step.
No	Go to step 13.
12	INSPECT BONNET SWITCH AND TRUNK/LIFTGATE SIGNAL • Monitor following BCM PID using the M-MDS. ― TR/LG_SW (liftgate/trunk latch switch) ― HOOD_SW (bonnet latch switch) • Are monitored PID values ON (open)?	Yes	Normal operation (Hazard warning light flashing on vehicles with theft-deterrent system operates in conjunction with theft-deterrent system).
No	Go to the next step.
*13	INSPECT TURN LIGHT SIGNAL CIRCUIT • Measure voltage at the BCM terminals 3J, 3I, 1P (right side turn signal), 8K, 8L and 1R (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.
*14	REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR • Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customer.
No	Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.

STEP

INSPECTION

ACTION

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.

Inspect the connection of the BCM connectors, and go to Step 4.

INSPECT FOR MALFUNCTION IN KEY REMINDER 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.

Go to Step 9.

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.

Go to Step 11.

INSPECT BCM POWER SUPPLY CIRCUIT

• Are the BCM power supply and voltage normal?

― IG1 signal (terminal 3AB, 4A)

― B+ signal (terminal 2D, 2J, 4B, 4C)

Yes

Go to the next step.

• Inspect for burnt fuse.

• Inspect the power supply system wiring harness for an open or short circuit.

• Then go to Step 14.

INSPECT BCM GROUND CIRCUIT

• Is the BCM ground voltage normal?

― 0V (terminal 1V, 2A)

Yes

Go to the next step.

Inspect the ground system wiring harness for open circuit.

Then go to Step 14.

INSPECT door latcu switch SIGNAL

• Monitor following BCM (door latcu switch) PID using the M-MDS.

― TR/LG_SW (Trunk lid/liftgate latch switch)

― DRSW_P (Passenger’s door latch switch)

― DRSW_D (Driver’s door latcu switch)

• Are monitored PID values normal?

Yes

Go to the next step.

• Inspect for open or short circuit in wiring harness between BCM and suspected door latch/trunk lid (4SD)/liftgate (5HB) latch switch.

― If wiring harness is normal, inspect suspect door latch/trunk lid (4SD)/liftgate (5HB) latch switch.

(See FRONT DOOR LATCH SWITCH INSPECTION.)

(See REAR DOOR LATCH SWITCH INSPECTION.)

(See TRUNK LID LATCH SWITCH INSPECTION.)

(See LIFTGATE LATCH SWITCH INSPECTION.)

― If wiring harness malfunction, repair or replace wiring harness, then go to Step 14.

INSPECT DOOR LATCU SWITCH SIGNAL VOLTAGE

• Are the wiring harness between the BCM and each door latch switch normal?

― Inspect each terminal (8B, 8D, 8F, 8H) under the following conditions.

• Door/trunk/liftgate closed : B+

• Door/trunk/liftgate open: 2.0V or less

Yes

Go to the next step.

• Inspect the door latcu switch.

• Inspect the door latcu switch system wiring harness for a short circuit.

• Then go to Step 14.

INSPECT KEY REMINDER SWITCH

• Is the key reminder switch normal?

ON: 12V

OFF: 0V

Yes

Replace the BCM.

Replace the key reminder switch, then go to Step 14.

INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, BCM GROUND CIRCUIT OR ELSEWHERE

• Measure the voltage at the BCM terminals 7I, 7M and 7K while operating the transmitter.

― All doors locked: 1.0 V or less → B+→ 1.0 V or less (Normal lock : 7I terminal)(Double lock : 7M terminal)

― All doors unlocked : 1.0 V or less → B+→ 1.0 V or less (7K terminal)

• Is the voltage as above?

Yes

Go to the next step.

• Inspect the wiring harness between BCM and the door lock actuator for an open or short circuit.

• Inspect the door lock actuator.

• Then go to Step 14.

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 step 12.

Inspect the door lock linkage then go to Step 14.

*11

INSPECT FOR MALFUNCTION IN THEFT-DETERRENT SYSTEM OR ELSEWHERE

• Is the theft-deterrent system equipped?

Yes

Go to the next step.

Go to step 13.

INSPECT BONNET SWITCH AND TRUNK/LIFTGATE SIGNAL

• Monitor following BCM PID using the M-MDS.

― TR/LG_SW (liftgate/trunk latch switch)

― HOOD_SW (bonnet latch switch)

• Are monitored PID values ON (open)?

Yes

Normal operation (Hazard warning light flashing on vehicles with theft-deterrent system operates in conjunction with theft-deterrent system).

Go to the next step.

*13

INSPECT TURN LIGHT SIGNAL CIRCUIT

• Measure voltage at the BCM terminals 3J, 3I, 1P (right side turn signal), 8K, 8L and 1R (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.

• 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.

*14

REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR

• Does the keyless entry system operate properly?

Yes

Troubleshooting completed.

Explain repairs to the customer.

Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.