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DTC P1147:00 [PCM (SKYACTIV-D)]

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Outline

System malfunction location	IAT sensor No.3 correlation problem
Detection condition	•  With the following conditions met, the difference between the IAT sensor No.3 output value and the boost air temperature sensor output value is 150 °C {302 °F} or more, or the difference between the IAT sensor No.1 output value and the IAT sensor No.3 output value is 150 °C {302 °F} or more for a continuous 0.128 s. ―  Before starting the engine, leave the vehicle with the engine turned off for 6 h or more. ―  Battery positive voltage: 10 V or more ―  Ignition is switched ON (engine off or on) ―  The following DTCs are not detected •  Boost air temperature sensor: P007C:00, P007D:00 •  IAT sensor No.1: P0112:00, P0113:00 •  IAT sensor No.3: P1118:00, P1119:00 •  Malfunction in instrument cluster: P2610:00 •  ECT sensor: P0118:00, P0117:00
Fail-safe	•  Inhibits the DENOx/DESOx control. •  Inhibits the EGR control. •  PCM restricts engine torque.
Possible cause	•  IAT sensor No.3 connector or terminal malfunction •  IAT sensor No.3 malfunction •  IAT sensor No.1 connector or terminal malfunction •  IAT sensor No.1 malfunction •  Boost air temperature sensor connector or terminal malfunction •  Boost air temperature sensor malfunction •  PCM connector or terminal malfunction •  PCM malfunction
System wiring diagram	•  Not applicable
Connector diagram	•  Not applicable

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
3	INSPECT IAT SENSOR No.3 CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT IAT SENSOR No.3 FOR MALFUNCTION •  Inspect the applicable part. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-D 1.8].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5	INSPECT IAT SENSOR No.1 CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT IAT SENSOR No.1 FOR MALFUNCTION •  Inspect the applicable part. (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-D 1.8].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
7	INSPECT BOOST AIR TEMPERATURE SENSOR CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	INSPECT BOOST AIR TEMPERATURE SENSOR FOR MALFUNCTION •  Inspect the applicable part. (See BOOST AIR TEMPERATURE SENSOR INSPECTION [SKYACTIV-D 1.8].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/BOOST AIR TEMPERATURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
9	INSPECT PCM CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Leave the vehicle for 6 h or more. ―  Switch the ignition ON (engine off) or leave for 1 min while idling. •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.