DTC P0112:00 [PCM (SKYACTIV-D 2.2)]

id0102j5701400

DTC P0112:00

IAT sensor No.1 circuit low input

DETECTION CONDITION

•  With the following conditions met, the IAT sensor No.1 voltage is less than 0.1 V for a continuous 5 s.

―  Battery positive voltage: 8—16 V

―  0.5 s have elapsed after ignition is switched ON (engine off or on)

―  The following DTCs are not detected

•  Constant voltage power supply control system: P0642:00, P0643:00

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Limits the engine torque/limits the maximum engine speed.

•  Inhibits the automatic diesel particulate filter regeneration control.

•  Inhibits the manual diesel particulate filter regeneration control.

•  Inhibits the EGR control.

•  Stops the G-vectoring control (GVC).

•  Limits the engine transaxle total control.

•  Inhibits engine-stop by i-stop control.

POSSIBLE CAUSE

•  Intake air temperature is abnormally high

•  MAF/IAT sensor No.1 connector or terminal malfunction

•  IAT sensor No.1 malfunction

•  Short to ground in wiring harness between MAF/IAT sensor No.1 terminal A and PCM terminal 2Y

•  PCM connector or terminal malfunction

•  Short circuit in IAT sensor No.1 signal circuit and ground circuit

•  PCM malfunction

DTC P0112:00	IAT sensor No.1 circuit low input
DETECTION CONDITION	• With the following conditions met, the IAT sensor No.1 voltage is less than 0.1 V for a continuous 5 s. ― Battery positive voltage: 8—16 V ― 0.5 s have elapsed after ignition is switched ON (engine off or on) ― The following DTCs are not detected • Constant voltage power supply control system: P0642:00, P0643:00 Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Limits the engine torque/limits the maximum engine speed. • Inhibits the automatic diesel particulate filter regeneration control. • Inhibits the manual diesel particulate filter regeneration control. • Inhibits the EGR control. • Stops the G-vectoring control (GVC). • Limits the engine transaxle total control. • Inhibits engine-stop by i-stop control.
POSSIBLE CAUSE	• Intake air temperature is abnormally high • MAF/IAT sensor No.1 connector or terminal malfunction • IAT sensor No.1 malfunction • Short to ground in wiring harness between MAF/IAT sensor No.1 terminal A and PCM terminal 2Y • PCM connector or terminal malfunction • Short circuit in IAT sensor No.1 signal circuit and ground circuit • PCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

Note

•  Recording can be facilitated using the screen capture function of the PC.

•  Record the freeze frame data/snap shot data.

—

Go to the next step.

2

INSPECT MAF/IAT SENSOR NO.1 CONNECTOR CONDITION

•  Switch the ignition OFF.

•  Disconnect the MAF/IAT sensor No.1 connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 7.

3

DETERMINE IF MALFUNCTION IS CAUSED BY IAT SENSOR NO.1 MALFUNCTION OR WIRING HARNESS SIDE MALFUNCTION

•  Verify that the MAF/IAT sensor No.1 connector is disconnected.

•  Switch the ignition ON (engine off).

Note

•  Another DTC may be stored by the PCM detecting an open circuit.

•  Measure the voltage at MAF/IAT sensor No.1 terminal A (vehicle wiring harness side).

•  Is the voltage approx. 5 V?

Yes

Replace MAF/IAT sensor No.1, then go to Step 7.

(See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-D 2.2])

No

Go to the next step.

4

INSPECT PCM CONNECTOR CONDITION

•  Disconnect the PCM connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 7.

5

INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND

•  Verify that the MAF/IAT sensor No.1 connector and the PCM connector are disconnected.

•  Switch the ignition OFF.

•  Inspect for continuity between MAF/IAT sensor No.1 terminal A (vehicle wiring harness side) and ground.

•  Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between MAF/IAT sensor No.1 terminal A and PCM terminal 2Y.

If there is a common connector:

•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.

•  Repair or replace the malfunctioning location.

If there is no common connector:

―  Repair or replace the wiring harness which has an open circuit.

Go to Step 7.

No

Go to the next step.

6

INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT

•  Verify that the MAF/IAT sensor No.1 connector and the PCM connector are disconnected.

•  Inspect for continuity between MAF/IAT sensor No.1 terminals A and B (vehicle wiring harness side).

•  Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals.

•  MAF/IAT sensor No.1 terminal A and PCM terminal 2Y

•  MAF/IAT sensor No.1 terminal B and PCM terminal 2V

If there is a common connector:

―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short circuit to determine the malfunctioning location.

―  Repair or replace the malfunctioning location.

If there is no common connector:

―  Repair or replace the malfunctioning wiring harness.

Go to the next step.

No

Go to the next step.

7

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

•  Reconnect all the disconnected connectors.

•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
(See CLEARING DTC [PCM (SKYACTIV-D 2.2)])

•  Perform the KOEO or KOER self-test.
(See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)])

•  Has DTC P0112:00 been recorded?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])

No

Go to the next step.

8

VERIFY OTHER DTCs

•  Has any other DTC or pending code been stored?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-D 2.2)])

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the freeze frame data/snap shot data.	—	Go to the next step.
2	INSPECT MAF/IAT SENSOR NO.1 CONNECTOR CONDITION • Switch the ignition OFF. • Disconnect the MAF/IAT sensor No.1 connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 7.
3	DETERMINE IF MALFUNCTION IS CAUSED BY IAT SENSOR NO.1 MALFUNCTION OR WIRING HARNESS SIDE MALFUNCTION • Verify that the MAF/IAT sensor No.1 connector is disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at MAF/IAT sensor No.1 terminal A (vehicle wiring harness side). • Is the voltage approx. 5 V?	Yes	Replace MAF/IAT sensor No.1, then go to Step 7. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
4		No	Repair or replace the connector, then go to Step 7.
5	INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND • Verify that the MAF/IAT sensor No.1 connector and the PCM connector are disconnected. • Switch the ignition OFF. • Inspect for continuity between MAF/IAT sensor No.1 terminal A (vehicle wiring harness side) and ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between MAF/IAT sensor No.1 terminal A and PCM terminal 2Y. If there is a common connector: • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. • Repair or replace the malfunctioning location. If there is no common connector: ― Repair or replace the wiring harness which has an open circuit. Go to Step 7.
5		No	Go to the next step.
6	INSPECT IAT SENSOR NO.1 SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT • Verify that the MAF/IAT sensor No.1 connector and the PCM connector are disconnected. • Inspect for continuity between MAF/IAT sensor No.1 terminals A and B (vehicle wiring harness side). • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. • MAF/IAT sensor No.1 terminal A and PCM terminal 2Y • MAF/IAT sensor No.1 terminal B and PCM terminal 2V If there is a common connector: ― Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short circuit to determine the malfunctioning location. ― Repair or replace the malfunctioning location. If there is no common connector: ― Repair or replace the malfunctioning wiring harness. Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)]) • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)]) • Has DTC P0112:00 been recorded?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
7		No	Go to the next step.
8	VERIFY OTHER DTCs • Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)])
8		No	DTC troubleshooting completed.