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DTC P0112 [MZR-CD (RF Turbo)]

BME010200100W26

DTC P0112 | IAT sensor No.2 circuit low input
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DETECTION CONDITION | • PCM monitors input voltage from IAT sensor No.2 while engine is running. If input voltage from IAT sensor No.2 is below 0.1 V, PCM determines IAT sensor No.2 circuit low input.
POSSIBLE CAUSE | • IAT sensor No.2 malfunction • Connector or terminal malfunction • Short to GND in wiring between IAT sensor No.2 terminal A and PCM terminal 8 • IAT sensor No.2 signal and GND circuits short each other • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform "DTC Confirmation Procedure". (See DTC CONFIRMATION PROCEDURE [MZR-CD (RF Turbo)].) • Is same DTC present during KOEO or KOER self-test? | Yes | Go to next step.
No | Intermittent concern exists. Go to "Intermittent Concern Troubleshooting". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
2 | INSPECT POOR CONNECTION OF IAT SENSOR NO.2 CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 7.
No | Go to next step.
3 | INSPECT IAT SENSOR NO.2 SIGNAL CIRCUIT FOR SHORT TO GND • Turn engine switch to OFF. • Inspect continuity between IAT sensor No.2 terminal A and body GND. • Is there continuity? | Yes | Repair or replace harness for short to GND, go to Step 7.
No | Go to next step.
4 | INSPECT IAT SENSOR NO.2 CIRCUIT FOR SHORT WITH EACH OTHER • Turn engine switch to OFF. • Inspect continuity between IAT sensor No.2 terminals A and B. • Is there continuity? | Yes | Repair or replace harness for short with each other, go to Step 7.
No | Go to next step.
5 | INSPECT IAT SENSOR NO.2 • Inspect IAT sensor No.2. (See INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace IAT sensor No.2, go to next Step 7. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
6 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to next step.
No | Go to next step.
7 | 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 [MZR-CD (RF Turbo)].)
• Is same DTC present?
Yes
Replace PCM, go to next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.