DTC P0098 [MZR-CD (RF Turbo)]

BME010200001W11

DTC P0098

IAT sensor No.1 circuit high input

DETECTION CONDITION

• PCM monitors input voltage from IAT sensor No.1 while engine is running. If input voltage from IAT sensor No.1 is above 5.0 V, PCM determines IAT sensor No.1 circuit high input.

POSSIBLE CAUSE

• IAT sensor No.1 malfunction
• Connector or terminal malfunction
• Short to power circuit in wiring between MAF/IAT sensor terminal D and PCM terminal 60
• Open circuit in wiring between MAF/IAT sensor terminal D and PCM terminal 60
• Open circuit in wiring between MAF/IAT sensor terminal E and PCM terminal 91
• 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.1 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
CLASSIFY IAT SENSOR NO.1 MALFUNCTION OR HARNESS MALFUNCTION
• Turn engine switch to ON (Engine OFF).
• Connect jumper wire between MAF/IAT sensor connector terminal D and E.
• Access IAT PID using WDS or equivalent.
• Is IAT PID below 1.0 V?
Yes
Replace MAF/IAT sensor, go to Step 7.
No
Go to next step.
4
INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER
• Turn engine switch to ON (Engine OFF).
• Inspect voltage between MAF/IAT sensor terminal D and body GND.
• Is voltage below 1.0 V?
Yes
Go to next step.
No
Repair or replace harness for short to power, go to Step 7.
5
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 Step 7.
No
Go to next step.
6
INSPECT IAT SENSOR NO.1 CIRCUIT FOR OPEN
• Turn engine switch to OFF.
• Inspect continuity between following harnesses:
- MAF/IAT sensor terminal D and PCM terminal 60.
- MAF/IAT sensor terminal E and PCM terminal 91.
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open, go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P0098 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.