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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (On-Board Diagnostic [Engine Controls MZI 3.7] (4 Of 5)) >> DTC P0620:00 >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
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 DRIVE BELT CONDITION 
  • Verify that drive belt auto tensioner indicator mark does not exceed limit.
  • Is drive belt normal?
Yes Go to the next step.
No Replace and/or adjust drive belt, then go to Step 12.
(See DRIVE BELT REMOVAL/INSTALLATION .)
4 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 12.
No Go to the next step.
5 INSPECT GENERATOR CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Switch the ignition ON (Engine off).
  • Measure voltage between generator terminal LI (wiring harness-side) and body ground.
  • Is voltage B+  ?
Yes Repair or replace suspected part, then go to Step 12.
No Go to the next step.
6 INSPECT GENERATOR CIRCUIT FOR SHORT TO GROUND 
  • Inspect for continuity between generator terminal LI (wiring harness-side) and body ground.
  • Is there continuity?
Yes Repair or replace suspected part, then go to the next step.
No Go to the next step.
7 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 12.
No Go to the next step.
8 INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between generator terminal LI (wiring harness-side) and PCM terminal 1O (wiring harness-side)
  • Is there continuity?
Yes Go to the next step.
No Repair or replace suspected part, then go to Step 12.
9 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 12.
No Go to the next step.
10 INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT 
  • Inspect 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 Step 12.
11 INSPECT GENERATOR 
Yes Replace the generator, then go to the next step.
(See GENERATOR REMOVAL/INSTALLATION [MZI 3.7 V6] .)
No Go to the next step.
12 VERIFY TROUBLESHOOTING OF DTC P0620:00 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.

    (See KOEO/KOER SELF TEST .)

  • Is the PENDING CODE for the DTC present?
Yes Repeat the inspection from Step 1.

Go to the next step.
No Go to the next step.
13 VERIFY AFTER REPAIR PROCEDURE 
Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.