NO.2 ALL ON-BOARD DIAGNOSTIC 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.

• The door switches include the rear door upper latch switches and rear door lower latch switches.

All on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in keyless control module power supply circuit, door switch circuit, trunk lid compartment light circuit, keyless control module ground circuit, or keyless receiver.

POSSIBLE CAUSE

• Malfunction in IG1 or B+ signal circuit of keyless control module

― Keyless control module power supply fuse malfunction

― Malfunction in wiring harness between keyless control module power supply fuses and keyless control module

• Malfunction in door open/closed signal circuit of keyless control module

― Door switch system malfunction

― Keyless control module malfunction

― Malfunction in wiring harness between keyless control module and door switch

• Malfunction in trunk lid open signal circuit of keyless control module

― Trunk lid compartment light switch system malfunction

― Keyless control module malfunction

― Malfunction in wiring harness between keyless control module and trunk lid compartment light switch

• Malfunction in keyless control module GND signal circuit

― Malfunction in wiring harness between keyless control module and ground

STEP	INSPECTION	ACTION
1	INSPECT KEYLESS CONTROL MODULE POWER SUPPLY FUSES • Are the keyless control module power supply fuses normal?	Yes	Go to the next step.
No	Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary. 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 KEYLESS CONTROL MODULE) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following keyless control module terminals: ― IG1 signal (terminal 2B) ― B+ signal (terminal 2A) • Is the voltage B+?	Yes	Go to the next step.
No	Repair the wiring harness between the fuse block and keyless control module, then go to Step 9.
*4	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FUSE BLOCK AND KEYLESS CONTROL MODULE, OR BETWEEN KEYLESS CONTROL MODULE AND GROUND) OR ELSEWHERE • Turn the ignition switch to the LOCK position. • Disconnect the keyless control module connector. • Measure the voltage at the following keyless control module connector terminal: ― IG1 signal (terminal 2B) • Is the voltage B+?	Yes	Repair the malfunctioning wiring harness, then go to Step 9.
No	Go to the next step.
*5	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS CONTROL MODULE AND GROUND) OR ELSEWHERE • Is there continuity between keyless control module connector terminal 2W and ground?	Yes	Go to the next step.
No	Repair the wiring harness between the keyless control module and ground, then go to Step 9.
6	INSPECT FOR CHECK CODE 04 IN INSTRUMENT CLUSTER • Inspect the door switch using the instrument cluster input/output check mode. (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.) • Is DTC 04 displayed?	Yes	Go to the next step.
No	Repair the door switch system using the DTC 04 inspection procedure, then go to Step 9.
7	INSPECT KEYLESS CONTROL MODULE OR WIRING HARNESS (BETWEEN KEYLESS CONTROL MODULE AND DOOR SWITCHES, TRUNK LID COMPARTMENT LIGHT SWITCH FOR CONTINUITY) • Open the driver-side door. • Is there continuity between keyless control module connector terminal 2K, 2G and ground?	Yes	Replace the keyless control module and reprogram the keyless control module ID code, then go to the next step.
No	Repair the wiring harness between the keyless control module, door switches, and trunk lid compartment light switch, 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	Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary. Install an appropriate amperage fuse.
9	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 KEYLESS CONTROL MODULE POWER SUPPLY FUSES

• Are the keyless control module power supply fuses normal?

Yes

Go to the next step.

Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary.

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 KEYLESS CONTROL MODULE) OR ELSEWHERE

• Turn the ignition switch to the ON position.

• Measure the voltage at the following keyless control module terminals:

― IG1 signal (terminal 2B)

― B+ signal (terminal 2A)

• Is the voltage B+?

Yes

Go to the next step.

Repair the wiring harness between the fuse block and keyless control module, then go to Step 9.

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FUSE BLOCK AND KEYLESS CONTROL MODULE, OR BETWEEN KEYLESS CONTROL MODULE AND GROUND) OR ELSEWHERE

• Turn the ignition switch to the LOCK position.

• Disconnect the keyless control module connector.

• Measure the voltage at the following keyless control module connector terminal:

― IG1 signal (terminal 2B)

• Is the voltage B+?

Yes

Repair the malfunctioning wiring harness, then go to Step 9.

Go to the next step.

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

• Is there continuity between keyless control module connector terminal 2W and ground?

Yes

Go to the next step.

Repair the wiring harness between the keyless control module and ground, then go to Step 9.

INSPECT FOR CHECK CODE 04 IN INSTRUMENT CLUSTER

• Inspect the door switch using the instrument cluster input/output check mode.

(See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.)

• Is DTC 04 displayed?

Yes

Go to the next step.

Repair the door switch system using the DTC 04 inspection procedure, then go to Step 9.

INSPECT KEYLESS CONTROL MODULE OR WIRING HARNESS (BETWEEN KEYLESS CONTROL MODULE AND DOOR SWITCHES, TRUNK LID COMPARTMENT LIGHT SWITCH FOR CONTINUITY)

• Open the driver-side door.

• Is there continuity between keyless control module connector terminal 2K, 2G and ground?

Yes

Replace the keyless control module and reprogram the keyless control module ID code, then go to the next step.

Repair the wiring harness between the keyless control module, door switches, and trunk lid compartment light switch, then go to the next step.

INSPECT POWER SUPPLY FUSE

• Is the keyless receiver power supply fuse normal?

Yes

Go to the next step.

Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary.

Install an appropriate amperage fuse.

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.