No. 4 Advanced Keyless Start Function Inoperative [Advanced Keyless And Start System]

4	Advanced keyless start function inoperative
POSSIBLE CAUSE	Malfunction in the transmitter (advanced key). Malfunction in the keyless control module. Malfunction in the keyless receiver. Malfunction in the keyless antenna. Malfunction in the PCM.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Retrieve the advanced keyless system DTC using the M-MDS. Are there DTC displayed?	Yes	Perform the applicable DTC diagnostic procedures.
1		No	Go to the next step.
2	Attempt to start the engine using the key. Does engine start?	Yes	Go to the next step.
2		No	Go to symptom troubleshooting flow No. 3 in SYMPTOM TROUBLESHOOTING - ENGINE - [LF] .
3	Does the keyless indicator light (green) turn ON when pressing the start knob?	Yes	Go to step 11.
3		No	If the keyless indicator light (green) does not illuminate: Go to the next step. If the keyless warning light (red) is flushing: Go to Step 6. If the keyless warning light (red) illuminates: Go to Step 9.
4	Bring the transmitter (advanced key) inside the passenger compartment. Measure the voltage at the keyless control module terminal 3N (push switch) while pushing the start knob. Is the voltage 0 V?	Yes	Go to the next step.
4		No	Inspect the wiring harness between the steering lock unit and keyless control. If the harness is normal, replace the steering lock unit. If the harness is malfunctioning, repair the wiring harness. Go to the next step.
5	Replace with a transmitter (advanced key) battery known to be good. Bring the transmitter (advanced key) inside the passenger compartment. Does the keyless entry system operate properly?	Yes	Replace the transmitter (advanced key). Then go to the next step.
5		No	Go to the next step.
6	Simulate the following keyless antenna using the M-MDS: ANT_RF# (keyless antenna (RH): terminals 2A and 2B) ANT_LF# (keyless antenna (LH): terminals 2C and 2D) ANT_BK# (keyless antenna (rear): terminals 2E and 2F) ANT_INN1# (keyless antenna (trunk): terminals 2G and 2H) ANT_INN2# (keyless antenna (rear No. 2): terminals 2I and 2J) ANT_INN3# (keyless antenna (center): terminals 2K and 2L) ANT_INN4# (keyless antenna (instrument panel): terminals 3G and 3H) Does each antenna operate properly (ON/OFF)?	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 is not normal, repair or replace for open or short circuit, then go to the next step.
7	Measure the pulse profile using an oscilloscope at the keyless control module terminal 3U while operating the transmitter (advanced key). Is the pulse profile become long at moment of transmitter operation?	Yes	Go to the next step.
7		No	Inspect the wiring harness between the keyless receiver and the keyless control module. If the harness is normal, replace the keyless receiver. If the harness is malfunctioning, repair the wiring harness. Go to the next step.
8	Inspect the keyless receiver. (See KEYLESS RECEIVER INSPECTION ). Is the keyless receiver normal?	Yes	Go to the next step.
8		No	Repair or replace malfunctioning part according to inspection result.
9	Measure the keyless control module terminal 3P voltage. Is the voltage approx. 5.0 V?	Yes	Go to the next step.
9		No	Inspect for open or short circuit between keyless control module terminal 3P (75-pin) and keyless receiver unit terminal C (6-pin). Is the wiring harness is not normal, repair or replace for open or short circuit, then go to the next step. If the wiring harness is normal, go to the next step.
10	Replace steering lock unit. Turn the start knob to START position. Does the advanced keyless start operate properly?	Yes	Troubleshooting completed. Explain repairs to the customers.
10		No	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION ). Then go to the next step.
11	Does the keyless entry system operate properly?	Yes	Troubleshooting completed. Explain repairs to the customers.
11	Does the keyless entry system operate properly?	No	Re-inspect the malfunction symptoms, then repeat form step 1 if malfunction recurs.