DTC P0112 [MZR-CD (RF Turbo)]

BME010200100W26

DTC P0112

IAT sensor No.2 circuit low input

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

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform "DTC Confirmation Procedure".
• Is same DTC present during KOEO or KOER self-test?
Yes
Go to next step.
No
Intermittent concern exists. Go to "Intermittent Concern Troubleshooting".
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.
• Is there any malfunction?
Yes
Replace IAT sensor No.2, go to next Step 7.
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.
• Is same DTC present?
Yes
Replace PCM, go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.