NO.2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE [KEYLESS ENTRY SYSTEM]

2	All on-board diagnostic functions inoperative
Description	Malfunction in BCM power supply circuit, door latch switch circuit, BCM ground circuit, or keyless receiver.
Possible cause	• Mistakes in previous services • Keyless receiver malfunction • BCM malfunction

Step	Inspection		Action
1	Does the on-board diagnosis function operate?	Yes	Go to the next step.
1	Does the on-board diagnosis function operate?	No	Perform symptom troubleshooting No.1 (See NO.1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE [KEYLESS ENTRY SYSTEM].)
2	Has the customer ever updated the transmitter ID number before?	Yes	Go to the next step.
2		No	Go to Step 5.
3	Did the malfunction occur after the ID number updating?	Yes	Go to the next step.
3	Did the malfunction occur after the ID number updating?	No	Go to Step 5.
4	Does the malfunction occur only when the transmitter which had been used before the ID number updating is used?	Yes	Update the ID number of the transmitter which cause the malfunction, then go to Step 10.
4		No	Go to the next step.
5	Is there repair record of the customer's keyless entry system?	Yes	Go to the next step.
5		No	Go to Step 8.
6	Does the malfunction occur after the repair?	Yes	Go to the next step.
6	Does the malfunction occur after the repair?	No	Go to Step 8.
7	Connect the negative battery cable. Is the malfunction corrected when the ID numbers for all the customer's transmitters are updated? (See TRANSMITTER ID CODE REGISTRATION [KEYLESS ENTRY SYSTEM].)	Yes	System is normal. (Explain to the customer that the malfunction occurred because all the transmitter ID numbers were not updated even though the body control module or a transmitter was replaced in the previous servicing.)
7		No	Go to the next step.
8	Inspect the keyless receiver. • Is the keyless receiver power supply voltage normal? ― Power supply (+B) (terminal A)	Yes	Go to the next step.
8		No	• Inspect for a burnt fuse (ROOM 15 A). • Inspect the power supply system wiring harness for an open or short circuit.
9	Inspect the keyless receiver. • Is the keyless receiver ground normal? ― 0 V (terminal E)	Yes	Go to the next step.
9		No	• Inspect the ground system wiring harness for an open circuit. • Inspect the ground tightening screw and nut for looseness.
10	Turn the ignition switch to the LOCK position. Disconnect the negative battery cable. Disconnect the keyless receiver connector and the BCM connector. • 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.
10		No	Repair or replace the wiring harness between the keyless receiver connector and the BCM.
11	• Measure the signal wave pattern for keyless receiver terminal D 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.)
11		No	Replace the keyless receiver, then go to the next step. (See KEYLESS RECEIVER REMOVAL/INSTALLATION [KEYLESS ENTRY SYSTEM].)
12	Does the keyless entry system operate normal?	Yes	Troubleshooting completed.
12	Does the keyless entry system operate normal?	No	Verify the malfunction, then go to Step 1 if it recurs.