NO.1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE [KEYLESS ENTRY SYSTEM]

id0903d2800600

Possible Causes

• BCM power supply, ground, or input/output signal error

― Power supply (IG1)

― Power supply (B+)

― Key reminder switch

― Ground

― Door latch switch

― Turn light system malfunction

― Door lock actuator malfunction

Diagnostic Procedure

Step

Inspection

Action

1

Did any of the following operate during the malfunction diagnosis?

•  All doors lock/unlock

•  Hazard warning lights flash

Yes

Go to the next step.

No

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

2

Did the following operate during the malfunction diagnosis?

•  All doors lock/unlock

Yes

Go to the next step.

No

Go to Step 7.

3

Did the following operate during the malfunction diagnosis?

•  Hazard warning lights flash

Yes

Go to the next step.

No

Go to Step 9.

4

Are the BCM power supply voltages normal?

•  Power supply (IG1) (Terminal 2G)

•  Power supply (B+) (Terminals 1J, 1O, and 1P)

Yes

Go to the next step.

No

•  Inspect for a burnt fuse (METER 10A, ROOM 15A, D/L 20 A).

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

5

Is the BCM ground voltage normal?

•  0 V (Terminals 2M and 2P)

Yes

Go to the next step.

No

Inspect the ground system wiring harness for an open circuit.

6

Are the BCM and each door latch switch normal?

•  Inspect each terminal (7G, 7O, 7M, and 7I) under the following conditions.

―  When the door is closed: 1.0 V or less

―  When the door is open: Approx. 5 V

Yes

Go to the next step.

No

•  Inspect the door latch switch.
(See FRONT DOOR LATCH SWITCH INSPECTION.)

(See REAR DOOR LATCH SWITCH INSPECTION [5HB].)

•  Inspect the door latch switch system wiring harness for an open or short circuit.

7

Is the signal voltage transmitted from the key reminder switch to the BCM normal?

―  When the key is inserted into the steering lock: B+ (Terminal 6R)

―  When the key is not inserted into the steering lock: 1.0 V or less (Terminal 6R)

Yes

Go to the next step.

No

•  Inspect the wiring harness between the BCM and the key reminder switch for an open or short circuit.

•  Replace the key reminder switch.

8

Are the signal voltages transmitted from the BCM to the door lock actuator normal?

•  Do the signal voltages transmitted to the door lock actuator change as follows when the malfunction diagnosis inspection procedure is performed.

―  When the doors are unlocked: 1.0 V or less→B+→1.0V or less (Terminal 3O)

―  When the doors are locked (Vehicles with double locking system): 1.0 V or less→B+→1.0V or less (Terminal 3E)

―  When the doors are locked (Vehicles without double locking system): 1.0 V or less→B+→1.0V or less (Terminal 3M)

Yes

Troubleshooting completed.

No

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

•  Inspect the door lock actuator.
(See FRONT DOOR LOCK ACTUATOR INSPECTION.)

9

Is the signal voltage transmitted to the BCM and each turn light normal?

•  Does the signal voltage transmitted to each turn light change as follows when the malfunction diagnosis inspection procedure is performed.

―  B+↔ 1.0 V or less (Terminals 1K, 1L, 3J, and 3L)

Yes

Troubleshooting completed.

No

•  Inspect the wiring harnesses between the BCM and each turn light for an open or short circuit.

•  Inspect each turn light.
(See LIGHT SWITCH INSPECTION.)

Step	Inspection		Action
1	Did any of the following operate during the malfunction diagnosis? • All doors lock/unlock • Hazard warning lights flash	Yes	Go to the next step.
1		No	Inspect the connection of the BCM connectors, then go to Step 4.
2	Did the following operate during the malfunction diagnosis? • All doors lock/unlock	Yes	Go to the next step.
2		No	Go to Step 7.
3	Did the following operate during the malfunction diagnosis? • Hazard warning lights flash	Yes	Go to the next step.
3		No	Go to Step 9.
4	Are the BCM power supply voltages normal? • Power supply (IG1) (Terminal 2G) • Power supply (B+) (Terminals 1J, 1O, and 1P)	Yes	Go to the next step.
4		No	• Inspect for a burnt fuse (METER 10A, ROOM 15A, D/L 20 A). • Inspect the power supply system wiring harness for an open or short circuit.
5	Is the BCM ground voltage normal? • 0 V (Terminals 2M and 2P)	Yes	Go to the next step.
5		No	Inspect the ground system wiring harness for an open circuit.
6	Are the BCM and each door latch switch normal? • Inspect each terminal (7G, 7O, 7M, and 7I) under the following conditions. ― When the door is closed: 1.0 V or less ― When the door is open: Approx. 5 V	Yes	Go to the next step.
6		No	• Inspect the door latch switch. (See FRONT DOOR LATCH SWITCH INSPECTION.) (See REAR DOOR LATCH SWITCH INSPECTION [5HB].) • Inspect the door latch switch system wiring harness for an open or short circuit.
7	Is the signal voltage transmitted from the key reminder switch to the BCM normal? ― When the key is inserted into the steering lock: B+ (Terminal 6R) ― When the key is not inserted into the steering lock: 1.0 V or less (Terminal 6R)	Yes	Go to the next step.
7		No	• Inspect the wiring harness between the BCM and the key reminder switch for an open or short circuit. • Replace the key reminder switch.
8	Are the signal voltages transmitted from the BCM to the door lock actuator normal? • Do the signal voltages transmitted to the door lock actuator change as follows when the malfunction diagnosis inspection procedure is performed. ― When the doors are unlocked: 1.0 V or less→B+→1.0V or less (Terminal 3O) ― When the doors are locked (Vehicles with double locking system): 1.0 V or less→B+→1.0V or less (Terminal 3E) ― When the doors are locked (Vehicles without double locking system): 1.0 V or less→B+→1.0V or less (Terminal 3M)	Yes	Troubleshooting completed.
8		No	• Inspect the wiring harness between the BCM and the door lock actuator for an open or short circuit. • Inspect the door lock actuator. (See FRONT DOOR LOCK ACTUATOR INSPECTION.)
9	Is the signal voltage transmitted to the BCM and each turn light normal? • Does the signal voltage transmitted to each turn light change as follows when the malfunction diagnosis inspection procedure is performed. ― B+↔ 1.0 V or less (Terminals 1K, 1L, 3J, and 3L)	Yes	Troubleshooting completed.
9		No	• Inspect the wiring harnesses between the BCM and each turn light for an open or short circuit. • Inspect each turn light. (See LIGHT SWITCH INSPECTION.)