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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 632 (On-Board Diagnostic (Engine Control System MZI-3.7) (5 Of 5)) >> DTC P1650:00 [MZI-3.7] >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related Service Bulletins available?
Yes Perform repair or diagnosis according to available Service Bulletins.
  • If vehicle is not repaired, go to next step.
No Go to the next step.
3 INSPECT PSP SWITCH CONNECTOR FOR POOR CONNECTION 
  • Switch the ignition off.
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
Yes Repair or replace suspected part, then go to Step 8.
No Go to the next step.
4 INSPECT PSP SWITCH CIRCUIT FOR SHORT TO GROUND 
  • Switch the ignition off.
  • Inspect for continuity between PSP switch terminal A (wiring harness-side) and body ground.
  • Is there continuity?
Yes Repair or replace suspected part, then go to Step 8
No Go to the next step.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Switch the ignition off.
  • Disconnect the PCM connector
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
Yes Repair or replace suspected part, then go to Step 8.
No Go to the next step.
6 INSPECT PSP SWITCH CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between PSP switch terminal A (wiring harness-side) and PCM terminal 1G (wiring harness-side)
  • Is there continuity?
Yes Go to the next step.
No Repair or replace suspected part, then go to Step 8.
7 INSPECT FOR CORRECT PCM OPERATION 
  • Disconnect all the PCM connectors.
  • Visually inspect for:
    • Pushed out pins
    • Corrosion
  • Connect all the PCM connectors and verify that they seat correctly.
  • Retrieve DTCs using the M-MDS.
  • Is the PENDING CODE for this DTC present?
Yes Go to the next step.
No The system is correctly. Go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P1650:00 HAS BEEN COMPLETED 
  • Verify that all disconnected connectors reconnected.
  • Start the engine.
  • Clear DTC from PCM memory using M-MDS.
  • Perform the "KOEO/KOER Self-Test"

    (See KOEO/KOER SELF TEST [MZI-3.7] )

  • Is same DTC present?
Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7] .)
No Troubleshooting completed.