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NO.3 ADVANCED KEYLESS ENTRY FUNCTION INOPERATIVE

id0903c7801400

3

Advanced keyless entry function inoperative

POSSIBLE CAUSE

•  Malfunction in the transmitter (card key).

•  Malfunction in the keyless control module.

•  Malfunction in the keyless receiver.

•  Malfunction in the keyless antenna.

•  Malfunction in the BCM.

•  Wrong usage.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Retrieve the advanced keyless system DTC using the WDS or equivalent. • Are there DTC displayed?	Yes	Perform the applicable DTC diagnostic procedures.
1		No	Go to the next step.
2	• Did the customer attempt to operate each front doors and liftgate using the request switch?	Yes	Go to the next step.
2		No	Inspect the advanced keyless system operations using the request switch. If the advanced keyless system is inoperative, then go to the next step.
3	• Prepare the followings: ― Make sure that there is no transmitter (card key) inside the passenger compartment. ― Close all doors including liftgate. ― Remove the key from the steering lock. ― Make sure that start knob is to the LOCK position. (Do not Press the knob) ― Make sure that the transmitter (card key) iswithin the advanced keyless system operative area(80 cm {31 in} radius from front door. • Does the advanced keyless system operate properly?	Yes	The system is normal. Explain the advanced keyless system operation.
3		No	Go to the next step.
4	Does the operation indicator light (LED) on the transmitter (card key) illuminate when any operation using the transmitter (card key) is performed?	Yes	Go to the next step.
4		No	Perform the procedure for symptom troubleshooting NO.1 [DOOR CANNOT BE LOCKED/UNLOCKED BY TRANSMITTER [ADVANCED KEYLESS AND START SYSTEM]. (See NO.1 DOOR CANNOT BE LOCKED/UNLOCKED BY TRANSMITTER (CARD KEY).)
5	• Measure the voltage at the keyless control module terminals 3H, 3J and 3L while operating the request switch. ― Operate driver’s side front door request switch (3H): 5.0 V→1.0 V or less ― Operate passenger’s side front door request switch (3J): 5.0 V→1.0 V or less ― Operate liftgate request switch (3L): 5.0 V→1.0 V or less • Is the voltage as above?	Yes	Go to the next step.
5		No	Inspect and repair the applicable wiring harness as necessary, then go to the next step.
6	• Measure the voltage at the following keyless control module terminal while operating the request switch. ― Terminal 1A and 1B for driver’s side keyless antenna ― Terminal 1C and 1D for passenger’s side keyless antenna ― Terminal 1E and 1F for exterior, rear keyless antenna ― Terminal 1G and 1H for interior, rear (4SD)/interior, RR (5HB, WGN) keyless antenna ― Terminal 1I and 1J for interior, RL keyless antenna (5HB, WGN) ― Terminal 1K and 1L for interior, middle keyless antenna ― Terminal 2G and 2H for interior, front keyless antenna • Is the voltage within 4.0—6.0 V?	Yes	Go to the next step.
6		No	• Inspect for open or short circuit between suspect keyless antenna and keyless control module. ― If the wiring harness normal, replace suspect keyless antenna, then go to the next step. ― If the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step.
7	• Disconnect the keyless receiver connector and keyless control module connector. • Inspect the wiring harness between the following terminals for an open or short circuit. ― Terminal A — Terminal 2S ― Terminal C — Terminal 2U ― Terminal E — GND • Is the wiring harness normal?	Yes	Go to the next step.
7		No	Inspect and repair the wiring harness between the keyless control module and the keyless receiver, then go to the next step.
8	• Measure the signal wave pattern for keyless control module terminal 2U using an oscilloscope when any of the request switches and the liftgate opener switch are operated. • Does the wave pattern change when the request switch is operated? Note • Perform the oscilloscope setting using 0.5V/DIV (Y), 100 ms/DIV (X), DC range.	Yes	Go to the next step.
8		No	Replace the keyless receiver, and then go to Step 10.
9	• Measure the voltage at the keyless control module terminals 2R (BCM) while operating the request switch. ― Unlock: 1.0 V or less→B+→1.0 V or less • Is the voltage as above?	Yes	Inspect and repair the wiring harness between the BCM and the keyless control module, then go to the next step.
9		No	Inspect the keyless control module. If the keyless control module is malfunctioning, replace the module.
10	• Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customers
10	• Does the keyless entry system operate properly?	No	Re-inspect the malfunction symptoms, then repeat form Step 1 if malfunction recurs.

3	Advanced keyless entry function inoperative
POSSIBLE CAUSE	• Malfunction in the transmitter (card key). • Malfunction in the keyless control module. • Malfunction in the keyless receiver. • Malfunction in the keyless antenna. • Malfunction in the BCM. • Wrong usage.