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

id0903d2800800

3

Transmitter ID code cannot be reprogrammed

Description

Malfunction in BCM circuit. Keyless receive circuit.

Possible cause

•  Malfunction in keyless receiver related part

―  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

•  Malfunction in BCM related part

―  Malfunction in wiring harness between keyless receiver and BCM

―  Malfunction in BCM

3	Transmitter ID code cannot be reprogrammed
Possible cause	• Malfunction in keyless receiver related part ― 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 • Malfunction in BCM related part ― Malfunction in wiring harness between keyless receiver and BCM ― Malfunction in BCM

Diagnostic Procedure

Step

Inspection

Action

1

Inspect the keyless receiver.

•  Is the keyless receiver power supply voltage normal?

―  Power supply (+B) (terminal A)

Yes

Go to the next step.

No

•  Inspect for a burnt fuse (ROOM 15 A)

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

2

Inspect the keyless receiver.

•  Is the keyless receiver grounded normally?

―  0 V (terminal E)

Yes

Go to the next step.

No

Inspect the ground system wiring harness for an open circuit.

3

Turn the ignition switch to the LOCK position.

Disconnect the negative battery cable.

Disconnect the keyless receiver connector (6-pin) and the BCM connector (24-pin).

•  Inspect the wiring harness between the following terminals for an open or short circuit.

―  Terminal D to 6W

•  Is it normal?

Yes

Go to the next step.

No

Repair or replace the wiring harness between the keyless receiver connector and the BCM connector, then go to the next step.

4

•  Measure the signal wave pattern for keyless receiver terminal D (6-pin) 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 [KEYLESS ENTRY SYSTEM].)

5

Can the ID number be updated?

(See TRANSMITTER ID CODE REGISTRATION [KEYLESS ENTRY SYSTEM].)

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
1	Inspect the keyless receiver. • Is the keyless receiver power supply voltage normal? ― Power supply (+B) (terminal A)	Yes	Go to the next step.
1		No	• Inspect for a burnt fuse (ROOM 15 A) • Inspect the power supply system wiring harness for an open or short circuit.
2	Inspect the keyless receiver. • Is the keyless receiver grounded normally? ― 0 V (terminal E)	Yes	Go to the next step.
2		No	Inspect the ground system wiring harness for an open circuit.
3	Turn the ignition switch to the LOCK position. Disconnect the negative battery cable. Disconnect the keyless receiver connector (6-pin) and the BCM connector (24-pin). • Inspect the wiring harness between the following terminals for an open or short circuit. ― Terminal D to 6W • Is it normal?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness between the keyless receiver connector and the BCM connector, then go to the next step.
4	• Measure the signal wave pattern for keyless receiver terminal D (6-pin) 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.)
4		No	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM].)
5	Can the ID number be updated? (See TRANSMITTER ID CODE REGISTRATION [KEYLESS ENTRY SYSTEM].)	Yes	Troubleshooting completed. Explain repairs to the customer.
5		No	Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.