NO.2 ALL KEYLESS ENTRY SYSTEM FUNCTIONS INOPERATIVE [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.

2	All keyless entry system functions inoperative
DESCRIPTION	• Malfunction in BCM power supply circuit, door latch switch circuit, BCM ground circuit, or keyless receiver.
POSSIBLE CAUSE	• Malfunction in IG1 or power supply signal circuit of BCM ― BCM power supply fuse malfunction ― Malfunction in wiring harness between BCM power supply fuses and BCM • Malfunction in door open/closed signal circuit of BCM ― Door switch system malfunction ― BCM malfunction ― Malfunction in wiring harness between BCM and door latch switch • Malfunction in BCM GND signal circuit ― Malfunction in wiring harness between BCM and ground • Malfunction in keyless receiver ― Keyless receiver malfunction ― Malfunction in wiring harness between keyless receiver and BCM

STEP	INSPECTION	ACTION
1	INSPECT BCM POWER SUPPLY FUSES • Are the BCM power supply fuses normal?	Yes	Go to the next step.
No	Install an appropriate amperage fuse.
2	INSPECT DOOR SWITCH INSTALLATION • Are the door switches installed securely?	Yes	Go to the next step.
No	Install the door switches securely, then go back to Step 5 of KEYLESS ENTRY SYSTEM PRELIMINARY INSPECTION.
*3	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND BCM) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following BCM terminals: ― IG1 signal (terminal 4A, 4D) ― Power supply signal (terminal 2A, 2B, 4F) • Is the voltage B+?	Yes	Go to the next step.
No	Repair the wiring harness between the fuse block and BCM, then go to Step 13.
*4	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO POWER SUPPLY BETWEEN FUSE BLOCK AND BCM, OR BETWEEN BCM AND GROUND) OR ELSEWHERE • Turn the ignition switch to the OFF position. • Disconnect the BCM connector. • Measure the voltage at the following BCM terminal (wiring harness-side): ― IG1 signal (terminal 4A, 4D) • Is the voltage B+?	Yes	Repair the malfunctioning wiring harness, then go to Step 13.
No	Go to the next step.
*5	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN BCM AND GROUND) OR ELSEWHERE • Is there continuity between BCM terminal 2N, 2G and ground?	Yes	Go to the next step.
No	Repair the wiring harness between the BCM and ground, then go to Step 13.
6	INSPECT OF MALFUNCTION IS IN DOOR SWITCH, WIRING HARNESS OR ELSEWHERE • Connect the M-MDS to DLC-2. • Turn the ignition switch to ON position. • Monitor the following door switch related PID. • Do these PIDs displayed properly?	Yes	Go to the next step.
No	Inspect and repair or replace suspected door switch and related wiring harness. Then go to Step 13.
7	INSPECT BCM OR WIRING HARNESS (BETWEEN BCM AND DOOR LATCH SWITCHES FOR CONTINUITY) • Open all doors. • Is there continuity between BCM terminals 6O, 6M, 6R, 6Q and ground?	Yes	Replace the BCM and reprogram the transmitter ID code, then go to the next step.
No	Repair the wiring harness between the BCM and door latch switches, then go to the next step.
8	INSPECT POWER SUPPLY FUSE • Is the keyless receiver power supply fuse normal?	Yes	Go to the next step.
No	Install an appropriate amperage fuse.
9	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS RECEIVER) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following keyless receiver terminal: ― B+ signal (terminal A) • Is the voltage B+?	Yes	Go to the next step.
No	Repair the wiring harness between the fuse block and keyless receiver, then go to Step 13.
10	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND GROUND) OR ELSEWHERE • Is there continuity between keyless receiver terminal E and ground?	Yes	Go to the next step.
No	Repair the wiring harness between the keyless receiver and ground, then go to Step 13.
11	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND BCM) OR ELSEWHERE • Turn the ignition switch to the ON position. • Disconnect the keyless receiver connector and BCM connector. • Is there continuity between the following terminals? ― 3B (BCM connector)—D (keyless receiver connector)	Yes	Go to the next step.
No	Repair the wiring harness between the keyless receiver and BCM, then go to Step 13.
12	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND BCM) OR BCM • Measure the signal wave pattern for BCM terminal 3B using an oscilloscope when the transmitter is operated with the key not inserted into the ignition key cylinder. • Does the wave pattern change when the transmitter is operated? Note • Perform the oscilloscope setting using 0.5V/DIV (Y), 100ms/DIV (X), DC range.	Yes	Replace the BCM, then go to the next step. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION.)
13	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 BCM POWER SUPPLY FUSES

• Are the BCM power supply fuses normal?

Yes

Go to the next step.

Install an appropriate amperage fuse.

INSPECT DOOR SWITCH INSTALLATION

• Are the door switches installed securely?

Yes

Go to the next step.

Install the door switches securely, then go back to Step 5 of KEYLESS ENTRY SYSTEM PRELIMINARY INSPECTION.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND BCM) OR ELSEWHERE

• Turn the ignition switch to the ON position.

• Measure the voltage at the following BCM terminals:

― IG1 signal (terminal 4A, 4D)

― Power supply signal (terminal 2A, 2B, 4F)

• Is the voltage B+?

Yes

Go to the next step.

Repair the wiring harness between the fuse block and BCM, then go to Step 13.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO POWER SUPPLY BETWEEN FUSE BLOCK AND BCM, OR BETWEEN BCM AND GROUND) OR ELSEWHERE

• Turn the ignition switch to the OFF position.

• Disconnect the BCM connector.

• Measure the voltage at the following BCM terminal (wiring harness-side):

― IG1 signal (terminal 4A, 4D)

• Is the voltage B+?

Yes

Repair the malfunctioning wiring harness, then go to Step 13.

Go to the next step.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN BCM AND GROUND) OR ELSEWHERE

• Is there continuity between BCM terminal 2N, 2G and ground?

Yes

Go to the next step.

Repair the wiring harness between the BCM and ground, then go to Step 13.

INSPECT OF MALFUNCTION IS IN DOOR SWITCH, WIRING HARNESS OR ELSEWHERE

• Connect the M-MDS to DLC-2.

• Turn the ignition switch to ON position.

• Monitor the following door switch related PID.

• Do these PIDs displayed properly?

Yes

Go to the next step.

Inspect and repair or replace suspected door switch and related wiring harness.

Then go to Step 13.

INSPECT BCM OR WIRING HARNESS (BETWEEN BCM AND DOOR LATCH SWITCHES FOR CONTINUITY)

• Open all doors.

• Is there continuity between BCM terminals 6O, 6M, 6R, 6Q and ground?

Yes

Replace the BCM and reprogram the transmitter ID code, then go to the next step.

Repair the wiring harness between the BCM and door latch switches, then go to the next step.

INSPECT POWER SUPPLY FUSE

• Is the keyless receiver power supply fuse normal?

Yes

Go to the next step.

Install an appropriate amperage fuse.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS RECEIVER) OR ELSEWHERE

• Turn the ignition switch to the ON position.

• Measure the voltage at the following keyless receiver terminal:

― B+ signal (terminal A)

• Is the voltage B+?

Yes

Go to the next step.

Repair the wiring harness between the fuse block and keyless receiver, then go to Step 13.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND GROUND) OR ELSEWHERE

• Is there continuity between keyless receiver terminal E and ground?

Yes

Go to the next step.

Repair the wiring harness between the keyless receiver and ground, then go to Step 13.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND BCM) OR ELSEWHERE

• Turn the ignition switch to the ON position.

• Disconnect the keyless receiver connector and BCM connector.

• Is there continuity between the following terminals?

― 3B (BCM connector)—D (keyless receiver connector)

Yes

Go to the next step.

Repair the wiring harness between the keyless receiver and BCM, then go to Step 13.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND BCM) OR BCM

• Measure the signal wave pattern for BCM terminal 3B using an oscilloscope when the transmitter is operated with the key not inserted into the ignition key cylinder.

• Does the wave pattern change when the transmitter is operated?

Note

• Perform the oscilloscope setting using 0.5V/DIV (Y), 100ms/DIV (X), DC range.

Yes

Replace the BCM, then go to the next step.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Replace the keyless receiver, then go to the next step.

(See KEYLESS RECEIVER REMOVAL/INSTALLATION.)

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.