No. 3 Transmitter Id Code Cannot Be Reprogrammed [Keyless Entry System]

3	Transmitter ID code cannot be reprogrammed
DESCRIPTION	Malfunction in keyless control module circuit
POSSIBLE CAUSE	Malfunction in keyless control module related part Keyless control module malfunction Keyless control module power supply fuse malfunction Malfunction in wiring harness between keyless control module and ground Malfunction in wiring harness between keyless control module power supply fuses and keyless control module

DIAGNOSTIC PROCEDURE

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.
1		No	Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary. Install an appropriate amperage fuse.
2	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.
2		No	Repair the wiring harness between the fuse block and keyless control module, then go to Step 5.
3	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 5.
3		No	Go to the next step.
4	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	Replace the keyless control module, then go to the next step.
4		No	Repair the wiring harness between the keyless control module and ground, then go to the next step.
5	REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customer.
5		No	Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.