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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 631 (On-Board Diagnostic (Engine Control System MZI-3.7) (4 Of 5)) >> DTC P0626:00 [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 the available Service Bulletins
  • If the vehicle is not repaired, go to the next step.
No Go to the next step
3 INSPECT GENERATOR TERMINAL FOR POOR INSTALLATION 
  • Switch the ignition off.
  • Inspect generator terminal B for looseness
  • Are there any malfunction?
Yes Connect generator terminal B correctly, then go to Step 9.
No Go to the next step
4 INSPECT GENERATOR CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Switch the ignition ON (Engine off).
  • Measure the voltage between the following terminals.
    • Generator terminal RC (wiring harness-side) and body ground.
    • Generator terminal LI (wiring harness-side) and body ground.
  • Is the voltage B+?
Yes Repair or replace suspected part, then go to Step 9.
No Go to the next step.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Switch the ignition off.
  • Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
  • Are there any malfunction?
Yes Repair or replace suspected part, then go to Step 9.
No Go to the next step.
6 INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between generator terminal RC (wiring harness-side) and PCM terminal 1BF (wiring harness-side)
  • Is there continuity?
Yes Go to the next step.
No Repair or replace suspected part, then go to Step 9.
7 INSPECT BATTERY POSITIVE TERMINAL FOR POOR INSTALLATION 
  • Switch the ignition off.
  • Inspect the battery positive terminal for looseness.
  • Is there any malfunction?
Yes Connect the battery positive terminal correctly, then go to Step 9.
No Go to the next step.
8 INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT 
  • Inspect the continuity between generator terminal B (wiring harness-side) and battery positive terminal (wiring harness-side)
  • Is there continuity?
Yes Go to the next step.
No Repair or replace suspected part, then go to the next step
9 VERIFY TROUBLESHOOTING OF DTC P0626:00 HAS BEEN COMPLETED 
  • Verify that all disconnected connectors reconnected
  • Clear the DTC from the PCM memory using the M-MDS
  • Perform the KOEO or KOER self-test using the M-MDS

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

  • Is the PENDING CODE for the 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.
10 VERIFY AFTER REPAIR PROCEDURE 
Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7] .)
No Troubleshooting completed.