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Diagnostic procedure

DTC P0112 [L3] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA (MODE 12) HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA (Mode 12) been recorded?
 Yes Go to the next step.
No Record the FREEZE FRAME DATA (Mode 12) 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 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 IAT SENSOR TERMINAL 
  • Turn the ignition switch off.
  • Disconnect the MAF/IAT sensor connector.
  • Inspect for bent terminal of MAF/IAT sensor terminals D and E (part-side).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 7.
No Go to the next step.
4 CLASSIFY IAT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION 
  • Connect the M-MDS to DLC-2.
  • Access IAT PID.
  • Verify IAT value when disconnecting the MAF/IAT sensor connector.
  • Does IAT value change?
 Yes Replace the MAF/IAT sensor, then go to Step 7.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
No Go to the next step.
5 INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for continuity between MAF/IAT sensor terminal D (wiring-harness-side) and body ground.
  • Is there continuity?
 Yes Repair or replace the wiring harness for short to ground, then go to Step 7.
No Go to the next step.
6 INSPECT IAT CIRCUITS FOR SHORT 
  • Inspect for continuity between MAF/IAT sensor terminals D and E (wiring-harness-side).
  • Is there continuity?
 Yes Repair or replace the wiring harness for short, then go to Step 7.
No Go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0112 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS.

    (See AFTER REPAIR PROCEDURE .)

  • Perform the KOEO/KOER self test.

    (See KOEO/KOER SELF TEST .)

  • Is same DTC present?
 Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC troubleshooting.
(See DTC TABLE .)
No Troubleshooting completed.
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