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SYMPTOM TROUBLESHOOTING [L3 WITH TC] 01-03–29 01-03 2007 Mazda CX-7 Workshop Manual (1871–1U–06B) Revised 10/2006 (Ref. No. R144/06) Diagnostic procedure STEP INSPECTION RESULTS ACTION 1 Connect the M-MDS to the DLC-2. • Engine does not completely start. • DTC B1681 is displayed. Yes Both conditions are appear: No Either or other condition appears: 2 Does the engine stall after approx. 2s from Yes Go to the next step. No Is the Is the immobilizer system is normal. 3 Is the coil connector securely connected to coil? Yes Go to the next step. No Connect the connector securely, retest from Step 1. 4 Does the security light illuminate? Yes Go to the next step. No Inspect and repair or replace the following: • Instrument cluster (See09-22-3 INSTRUMENT CLUSTER With advanced keyless entry system • Between keyless CM 3X and instrument cluster 2R • Between keyless CM 3W and instrument cluster 2T Without advanced keyless entry system • Between PCM 1AM and instrument cluster 2R • Between PCM 1AI and instrument cluster 2T 5 Retrieve the DTC using the M-MDS. Yes Go to appropriate DTC test. No Go to the next step. 6 Is there continuity between PCM terminal 1BD, Yes Go to the next step. No Repair or replace the wiring harness. 7 Turn the ignition switch to the ON position Yes Go to the next step. No Repair or replace the wiring harness. 8 Turn the ignition switch to the ON position. Yes Go to the next step. No Repair or replace the wiring harness. 9 Disconnect the coil connector. Yes Go to the next step. No Repair or replace the wiring harness between coil 10 Inspect the following wiring harness and With advanced keyless entry system • Between coil terminal A and keyless CM terminal 3U • Between coil terminal B and keyless CM terminal 3V Without advanced keyless entry system • Between coil terminal A and instrument cluster 2Q • Between coil terminal B and instrument cluster 2S Is there any malfunction (open or short circuit, Yes Repair or replace malfunctioning part. No With advanced keyless entry system Go to the next step. Without advanced keyless entry system Go to Step 14. 11 Is there continuity between the keyless CM Yes Go to the next step. No Repair or replace the wiring harness. 12 Turn the ignition switch to the ON position. Yes Go to the next step. No Repair or replace the wiring harness. |