NO.3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED [KEYLESS ENTRY SYSTEM]

NO.3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED [KEYLESS ENTRY SYSTEM]SM2446081

NO.3 TRANSMITTER ID CODE CANNOT BE REPROGRAMMED [KEYLESS ENTRY SYSTEM]

id0903d2800800

3	Transmitter ID code cannot be reprogrammed
DESCRIPTION	• Malfunction in BCM circuit or keyless receiver circuit.
POSSIBLE CAUSE	• Keyless receiver malfunction ― Keyless receiver malfunction ― Keyless receiver power supply fuse malfunction ― Malfunction in wiring harness between keyless receiver and ground ― Malfunction in wiring harness between keyless receiver power supply fuses and keyless receiver ― Malfunction in wiring harness between keyless receiver and BCM or keyless control module • BCM malfunction ― Malfunction in wiring harness between keyless receiver and BCM ― Malfunction in BCM

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT POWER SUPPLY FUSE • Is the keyless receiver power supply fuse normal?	Yes	Go to the next step.
1		No	Install an appropriate amperage fuse, then go to Step 6.
2	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS RECEIVER) OR ELSEWHERE • Measure the voltage at the following keyless receiver terminal: ― Power supply signal (terminal A) • Is the voltage B+?	Yes	Go to the next step.
2		No	Repair the wiring harness between the fuse block and keyless receiver, then go to Step 6.
3	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.
3		No	Repair the wiring harness between the keyless receiver and ground, then go to Step 6.
4	INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY OR SHORT CIRCUIT BETWEEN THE KEYLESS RECEIVER AND THE BCM) OR ELSEWHERE • Turn the ignition switch to LOCK position. • Disconnect the keyless receiver (6-pin) and the BCM (24-pin) connector. • Inspect wiring harness and connectors for continuity between keyless receiver terminal D (6-pin) and BCM terminal 3E (24-pin). • Is the wiring harness and connectors normal?	Yes	Go to the next step.
4		No	Repair or replace suspect part, then go to Step 6.
5	INSPECT IF MALFUNCTION IS IN KEYLESS RECEIVER OR BCM • Measure the signal wave pattern for BCM terminal 3E 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.)
5		No	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION.)
6	REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR • Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customer.
6		No	Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.