Test Procedures

DA1 DTCS P0112, P0113 AND P0114: CHECK FOR SELF-TEST DTCS

Are any of the following DTCs present during PCM or TCM self-test: P0112, P0113, or P0114?

Yes	No
For KOEO and KOER DTC P0112, GO to DA6. For KOEO and KOER DTC P0113, GO to DA2. For all others, GO to DA8.	Unable to duplicate or identify the fault at this time. Concern is elsewhere. RETURN to SYMPTOM CHARTS - HYBRID ESCAPE for further direction.

DA2 DTC P0113: CHECK THE IAT SIGNAL CIRCUIT

The DTC indicates the sensor signal is greater than the self-test maximum.
MAF/IAT Sensor connector disconnected.
Key in ON position.

Measure the voltage between:

( + ) MAF/IAT Sensor Connector, Harness Side	( - )
IAT - Pin 1	Ground

Is the voltage between 4.5 V - 5.5 V?

Yes	No
GO to DA3.	GO to DA4.

DA3 CHECK IAT SENSOR RESISTANCE

Key in OFF position.

Measure the resistance between:

( + ) MAF/IAT Sensor Connector, Component Side	( - ) MAF/IAT Sensor Connector, Component Side
IAT - Pin 1	SIGRTN - Pin 2

Is the resistance between 1K ohms - 500K ohms?

Yes	No
GO to DA4.	INSTALL a new MAF/IAT sensor.

DA4 CHECK THE SIGNAL AND SIGRTN CIRCUITS FOR AN OPEN IN THE HARNESS

PCM connector disconnected.

Measure the resistance between:

( + ) MAF/IAT Sensor Connector, Harness Side	( - ) PCM Connector, Harness Side
IAT - Pin 1	IAT - Pin B39
SIGRTN - Pin 2	SIGRTN - Pin B41

Are the resistances less than 5 ohms?

Yes	No
GO to DA5.	REPAIR the open circuit.

DA5 CHECK THE SIGNAL FOR A SHORT TO POWER IN HARNESS

Key in OFF position.
PCM connector disconnected.
Key in ON position.

Measure the voltage between:

( + ) MAF/IAT Sensor Connector, Harness Side	( - )
IAT - Pin 1	Ground

Is the voltage greater than 1 V?

Yes	No
REPAIR the short circuit.	Key in OFF position. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .

DA6 DTC P0112: SIMULATE AN OPPOSITE SIGNAL TO THE PCM

NOTE: The DTC indicates the sensor signal is less than the self-test minimum.

MAF/IAT Sensor connector disconnected.
Key in ON position.
Access the PCM and monitor the IAT V PID.

Is the voltage greater than 4.2 V?

Yes	No
Key in OFF position. INSTALL a new MAF/IAT sensor.	Key in OFF position. GO to DA7.

DA7 CHECK THE SENSOR SIGNAL FOR A SHORT TO GROUND

PCM connector disconnected.

Measure the resistance between:

( + ) PCM Connector, Harness Side	( - ) PCM Connector, Harness Side
IAT - Pin B39	SIGRTN - Pin B41

Measure the resistance between:

( + ) PCM Connector, Harness Side	( - ) Vehicle Battery
IAT - Pin B39	Negative terminal

Measure the resistance between:

(+) PCM Connector, Harness Side	(-) PCM Connector, Harness Side
IAT - Pin B39	MAF RTN - Pin B43

Is the resistance greater than 10K ohms?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	REPAIR the short circuit.

DA8 SELF-TEST DTCS P0112, P0113, P0114 OR P1112: INTERMITTENT CHECK

Key in ON position.
Access the PCM and monitor the IAT V PID.
While observing the PID, carry out the following:
- Tap on the sensor to simulate road shock.
- Wiggle the sensor connector.

Is there a large change in the voltage reading?

Yes	No
DISCONNECT and INSPECT the connector. If OK, INSTALL a new MAF/IAT sensor.	GO to DA9.

DA9 CHECK THE WIRING HARNESS

Access the PCM and monitor the IAT V PID.
While observing the PID, wiggle, shake, and bend small sections of the wiring harness working from the sensor to the PCM.

Is there a large change in the voltage reading?

Yes	No
ISOLATE the fault REPAIR as necessary.	Key in OFF position. GO to DA10.

DA10 CHECK THE PCM AND VEHICLE HARNESS CONNECTORS

PCM connector disconnected.
MAF/IAT Sensor connector disconnected.

Are the connectors and pins OK?

Yes	No
The fault is not present at this time. DISREGARD the current diagnostic trouble code (DTC) at this time. ADDRESS the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .	REPAIR as necessary.