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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (On-Board Diagnostic (Engine Control System (L3)) >> DTC P0102 >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0102 [L3] DIAGNOSTIC PROCEDURE

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 repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 INSPECT MAF SENSOR CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the MAF/IAT sensor connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace terminals, then go to Step 8.
No Go to the next step.
4 INSPECT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT 
  • Turn ignition switch to ON (Engine off).
  • Inspect voltage at MAF/IAT sensor terminal A (harness-side).
  • Is voltage B+  ?
 Yes Go to the next step.
No Inspect for open circuit in wiring harness between MAF/IAT sensor terminal A (harness-side) and main relay. Repair or replace harness, then go to Step 8.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to Step 8.
No Go to the next step.
6 INSPECT MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Remove PCM with PCM connector connected.
  • Inspect for continuity between MAF/IAT sensor terminal C (harness-side) and PCM terminal 11 (1) 1P(2) (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace suspected harness, then go to Step 8.
7 INSPECT MAF SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT 
  • Inspect continuity between following circuits:
    • MAF/IAT sensor terminal C (harness-side) and body ground
    • MAF/IAT sensor connector terminal C and B (harness-side)
  • Is there continuity?
 Yes Repair or replace suspected harness, then go to the next step.
No Replace MAF/IAT sensor, then go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P0102 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to ON (Engine off).
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start engine and warm it up completely.
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
(1) California emission regulation applicable ATX model
(2) Except for California emission regulation applicable ATX model
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