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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 629 (On-Board Diagnostic (Engine Control System MZI-3.7) (2 Of 5)) >> DTC P0112:00 [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 IAT SENSOR TERMINAL 
  • Switch the ignition to off.
  • Disconnect MAF/IAT sensor connector.
  • Inspect for bent terminal of MAF/IAT sensor terminals E and F (part-side).
  • Is there any malfunction?
 Yes Repair or replace suspected part, then go to Step 6.
No Go to the next step
4 CLASSIFY IAT SENSOR MALFUNCTION OR HARNESS MALFUNCTION 
  • Connect M-MDS to DLC-2.
  • Access IAT PID.
  • Verify IAT value when disconnecting MAF/IAT sensor connector.
  • Does IAT value change?
 Yes Replace MAF/IAT sensor or harness, then go to Step 6.
No Go to the next step
5 INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND 
  • Switch the ignition to off.
  • Disconnect PCM connector.
  • Inspect continuity between MAF/IAT sensor terminal F (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.
6 VERIFY TROUBLESHOOTING OF DTC P0112:00 HAS BEEN COMPLETED 
  • Verify that all disconnected connectors reconnected.
  • Switch the ignition to ON (Engine off).
  • Clear the DTC from the PCM memory using the M-MDS.
  • Start engine and warm it up completely.
  • 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.
7 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7] )
No Troubleshooting completed
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