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DTC P0112 [L3]

BME010200100W07

DTC P0112 | IAT circuit low input
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DETECTION CONDITION | • PCM monitors IAT sensor signal at PCM terminal 2E. If PCM detects IAT sensor voltage below 0.15 V, the PCM determines that IAT sensor circuit has malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE | • IAT sensor malfunction • Connector or terminal malfunction • Short to ground circuit between MAF/IAT sensor terminal D and PCM terminal 2E • Short each harness IAT signal circuit and IAT ground circuit. • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE [L3].) • Is same DTC present? | Yes | Go to next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
2 | INSPECT IAT SENSOR TERMINAL • Turn ignition key to OFF. • Disconnect 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 terminal, then go to Step 6.
No | Go to next step.
3 | CLASSIFY IAT SENSOR MALFUNCTION OR HARNESS MALFUNCTION • Connect WDS or equivalent to DLC-2. • Access IAT PID. • Verify IAT value when disconnecting MAF/IAT sensor connector. • Does IAT value change? | Yes | Replace MAF/IAT sensor, then go to Step 6.
No | Go to next step.
4 | INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO GROUND • Turn ignition key to OFF. • Inspect continuity between MAF/IAT sensor terminal D (harness-side) and body ground. • Is there continuity? | Yes | Repair or replace harness for short to ground, then go to Step 6.
No | Go to next step.
5 | INSPECT IAT CIRCUITS FOR SHORT • Inspect continuity between MAF/IAT sensor terminals D and E (harness-side). • Is there continuity? | Yes | Repair or replace harness for short, then go to Step 6.
No | Go to next step.
6 | VERIFY TROUBLESHOOTING OF DTC P0112 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from PCM memory using WDS or equivalent. • Perform KOEO/KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is same DTC present?
Yes
Replace PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to applicable DTC troubleshooting. (See DTC TABLE [L3].)
No | Troubleshooting completed.