NO.4 ADVANCED KEYLESS START FUNCTION INOPERATIVE [ADVANCED KEYLESS AND START SYSTEM]

id0903d1801500

Possible Causes

Diagnostic Procedure

Step	Inspection		Action
1	•  Inspect for any advanced keyless and start system-related DTCs. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) •  Are any DTCs displayed?	Yes	Perform the corresponding DTC troubleshooting.
		No	Go to the next step.
2	•  Verify if the engine can be started using the auxiliary key. •  Does the engine start?	Yes	Go to the next step.
		No	Perform symptom troubleshooting No.3 (Section 01-03). (See NO.3 WILL NOT CRANK [ZJ, ZY].)
3	•  Verify that the keyless indicator light (green) illuminates when the start knob is pressed.	Yes	Go to Step 10.
		No	If the keyless indicator light (green) does not illuminate: •  Go to the next step. If the keyless indicator light (red) flashes: •  Go to Step 5. If the keyless indicator light (red) illuminates: •  Go to Step 8.
4	•  Bring the advanced key into the cabin. •  Inspect the signal voltages at the following keyless control module connector (30-pin) when the start knob is pressed. ―  Start knob (push switch): B+ (Terminal 3V) ―  Keyless switch: 1.0 V or less (Terminal 3W) •  Are the signal voltages normal?	Yes	Go to the next step.
		No	Inspect the wiring harness between the steering lock unit and the keyless control module. If the wiring harness is normal: •  Replace the steering lock unit, then go to the next step. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].) (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [R.H.D.].) If the wiring harness is malfunctioning: •  Repair or replace the wiring harness, then go to the next step.
5	•  Perform advanced keyless and start system DTC inspection with all the following condition met. ―  The start knob is not in the LOCK position. ―  The start knob is not pressed. ―  All doors are closed. ―  The auxiliary key is not inserted in the ignition key cylinder. •  Perform DTC inspection. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) •  Are any DTCs displayed?	Yes	Perform the corresponding DTC troubleshooting.
		No	Go to the next step.
6	•  Inspect the advanced key. •  Is the advanced key normal?	Yes	Replace the keyless receiver, then go to Step 8. (See KEYLESS RECEIVER REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
		No	Replace the advanced key, then go to the next step.
7	•  Inspect the keyless receiver. (See KEYLESS RECEIVER INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) •  Is the keyless receiver normal?	Yes	Go to the next step.
		No	Inspect the corresponding part following “Inspection item(s)”.
8	•  Measure the voltage at keyless control module connector (12-pin) terminal 2L. •  Is the voltage 5.0 V?	Yes	Go to the next step.
		No	Inspect the wiring harness between keyless control module connector (12-pin) terminal 2L and steering lock unit (8-pin) terminal G for an open or short circuit. If the wiring harness is normal: •  Go to the next step. If the wiring harness is malfunctioning: •  Replace the malfunctioning part, then go to the next step.
9	•  Inspect the steering lock unit. (See STEERING LOCK UNIT INSPECTION [WITH ADVANCED KEYLESS AND START SYSTEM].) •  Is the steering lock unit normal?	Yes	Replace the keyless control module, then go to the next step. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
		No	Go to the next step.
10	•  Turn the start knob to the START position. •  Does the advanced keyless entry and start system operate normally?	Yes	Troubleshooting completed.
		No	Verify the malfunction, then go to Step 1 if it recurs.