DTC U0401:68 [ADVANCED KEYLESS AND START SYSTEM]

id0902e1399300

Description

Possible Causes

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs •  Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 1.3, MZR 1.5].) (See MZ-CD 1.6.) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 1.3, MZR 1.5].) (See MZ-CD 1.6.)
		No	Go to the next step.
2	PERFORM DTC INSPECTION AND VERIFY THAT MALFUNCTIONING PART IS PCM •  Clear the DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) •  Perform the keyless control module DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) •  Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR 1.3, MZR 1.5].) (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].)
		No	Go to Step 4.
3	VERIFY TROUBLESHOOTING COMPLETED •  Clear the DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) •  Perform the keyless control module DTC inspection using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) •  Is the same DTC present?	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.
4	VERIFY THAT NO OTHER DTCs ARE PRESENT •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [ADVANCED KEYLESS AND START SYSTEM].)
		No	DTC troubleshooting completed.