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Home >> Mazda >> 2016 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> No. 2 Check Engine Light Illuminates >> Diagnostic Procedure

Diagnostic Procedure

STEP INSPECTION RESULTS ACTION
1 VERIFY PCM DTC 
Yes Go to the applicable DTC inspection.
Refer too DTC TABLE [PCM (SKYACTIV-G 2.5T)] .)
No Go to the next step.
2 INSPECT INSTRUMENT CLUSTER 
Yes Replace the instrument cluster.
Refer too INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
No Inspect for a short or open circuit between the following terminals:
  • Instrument cluster terminal 1B-Front body control module (FBCM) terminal 2K
  • Instrument cluster terminal 1D-Front body control module (FBCM) terminal 2I
  • Front body control module (FBCM) terminal 2P-PCM terminal 2AK
  • Front body control module (FBCM) terminal 2N-PCM terminal 2AL

Repair or replace the wiring harness if necessary.
3 Verify the test results.
  • If normal, return to the diagnostic index to service any additional symptoms.

    Refer too SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5T] .)

  • If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
    • If the vehicle is repaired, troubleshooting is completed.
    • If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.

      Refer too PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)