DTC U0401:68 [ADVANCED KEYLESS AND START SYSTEM]

id0902e1399300

Detection Condition

• Correct data cannot be received from PCM

Possible Causes

• PCM malfunction

Diagnostic Procedure

Step

Inspection

Action

1

INSPECT PCM

•  Inspect the PCM DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].)

•  Is the DTC displayed?

Yes

•  Go to the applicable DTC inspection.
(See DTC TABLE [ZJ, ZY].)

•  After completing a separate DTC inspection, go to the next step.

No

Go to the next step.

2

VERIFY DTCs

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].)

•  Verify DTCs using the M-MDS.
(See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is DTC U0401:68 displayed?

Yes

Replace the PCM.

(See PCM REMOVAL/INSTALLATION [ZJ, ZY].)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	INSPECT PCM • Inspect the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [ZJ, ZY].) • Is the DTC displayed?	Yes	• Go to the applicable DTC inspection. (See DTC TABLE [ZJ, ZY].) • After completing a separate DTC inspection, go to the next step.
1		No	Go to the next step.
2	VERIFY DTCs • Clear DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) • Verify DTCs using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is DTC U0401:68 displayed?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [ZJ, ZY].)
2		No	DTC troubleshooting completed.