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ON-BOARD DIAGNOSTIC 04-02–19 04-02 DTC C1186, C1266 id040200801300 Diagnostic procedure End Of Sie DTC C1186, C1266 Valve relay system DETECTION CONDITION • C1186 — DSC HU/CM internal valve relay remains OFF when valve relay ON is commanded. • C1266 — DSC HU/CM internal valve relay remains ON (stuck) when valve relay OFF is commanded. POSSIBLE CAUSE • ABS 2 20A fuse malfunction • Open circuit or short to ground in the wiring harness between the battery and the DSC HU/CM terminal C • Open or short circuit in the DSC HU/CM internal valve relay, or stuck valve relay • Poor connection at connectors (female terminal) STEP INSPECTION ACTION 1 INSPECT DSC FUSE CONDITION • Is the ABS 2 20A fuse normal? Yes Go to the next step. No Replace the fuse, then go to Step 3. 2 INSPECT VALVE RELAY POWER SUPPLY • Turn the ignition switch off. • Disconnect DSC HU/CM connector. • Turn the ignition switch to the ON position (engine off). • Measure voltage between DSC HU/CM terminal C (harness-side) and ground. • Is voltage B+? Yes Go to the next step. No Repair or replace the wiring harness for open circuit 3 VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from the memory. (See 04-02-3 ON-BOARD DIAGNOSIS.) • Is the same DTC present? Yes Replace the DSC HU/CM, then go to next step. No Go to the next step. 4 VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? Yes Go to the applicable DTC inspection. No DTC troubleshooting completed. DSC HU/CM C BATTERY ABS 2 20A A B C D F I L O R U X E H Q T W Z G J M P S V Y K N AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT DSC HU/CM WIRING HARNESS-SIDE CONNECTOR 1871-1U-06B(04-02).fm 19 ページ 2006年3月15日 水曜日 午前11時12分 |