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ON-BOARD DIAGNOSTIC 02-02–9 02-02 DTC U0127 id020200800600 With Advanced Keyless System DTC U0127 • Communication failure between instrument cluster and keyless receiver DETECTION CONDITION • The instrument cluster cannot receive signal from the keyless CM or keyless receiver. POSSIBLE CAUSE With advanced keyless system • Open or short circuit in the wiring harness between the keyless CM terminal 3Q and the instrument cluster terminal 2N. • Keyless control module malfunction. • Instrument cluster malfunction. • Poor connection at connectors (female terminal) With keyless entry system • Open or short circuit in the wiring harness between the keyless receiver terminal D and the instrument cluster terminal 2N. • Keyless receiver malfunction. • Instrument cluster malfunction. • Poor connection at connectors (female terminal) STEP INSPECTION ACTION 1 INSPECT WHEEL UNIT SIGNAL FOR OPEN • Turn the ignition switch off. • Disconnect keyless CM and instrument cluster connectors. • Inspect for continuity between keyless CM terminal 3Q (harness-side) and instrument • Is there continuity? Yes Go to the next step. No Repair or replace the wiring harness for an open circuit 2 INSPECT WHEEL UNIT SIGNAL FOR SHORT • Turn the ignition switch off. • Disconnect keyless CM and instrument cluster connectors. • Measure the voltage between keyless CM terminal 3Q (harness-side) and ground. • Is there B+? Yes Repair or replace the wiring harness for a short to power No Go to the next step. 3 INSPECT WHEEL UNIT SIGNAL FOR SHORT • Turn the ignition switch off. • Disconnect keyless CM and instrument cluster connectors. • Inspect for continuity between keyless CM terminal 3Q (harness-side) and ground. • Is there continuity? Yes Repair or replace the wiring harness for a short to ground No Go to the next step. 4 INSPECT FOR KEYLESS CM MALFUNCTION • Turn the ignition switch off. • Using the M-MDS, perform the DTC inspection for the keyless CM. • Is any DTCs present? Yes Go to the applicable DTC inspection. (See 09-02C-3 DTC No Go to the next step. 5 VERIFY TROUBLESHOOTING COMPLETED • Turn the ignition switch to the ON position and drive the vehicle at a speed of 25 km/h • Clear the DTC from the memory. (See 02-02-3 TIRE PRESSURE • Is the same DTC present? Yes • If the malfunction recurs, replace the instrument cluster. (See 09-22-2 INSTRUMENT CLUSTER REMOVAL/ • Configure the instrument cluster. (See 09-22-3 INSTRUMENT CLUSTER CONFIGURATION.) • Register the wheel unit ID. (See 02-12-4 WHEEL UNIT ID REGISTRATION.) • Go to the next step. No Go to the next step. 6 VERIFY AFTER REPAIR PROCEDURE • Drive the vehicle at a speed of 25 km/h {15.5 mph} or more for 10 min or more. • Are there any other DTCs present? Yes Go to the applicable DTC inspection. (See 02-02-3 TIRE No DTC troubleshooting completed. 1871-1U-06B(02-02).fm 9 ページ 2006年3月15日 水曜日 午前10時56分 |