Chrysler Voyager. Manual — part 65
Symptom:
P0112-INTAKE AIR TEMPERATURE SENSOR LOW
When Monitored and Set Condition:
P0112-INTAKE AIR TEMPERATURE SENSOR LOW
When Monitored:
With the ignition on. Battery voltage greater than 10 volts.
Set Condition:
The Intake Air Temperature (IAT) sensor voltage is less than 0.0784 of a
volt. One trip Fault.
POSSIBLE CAUSES
IAT SENSOR VOLTAGE BELOW 1.0 VOLT
IAT SENSOR INTERNAL FAILURE
(K21) IAT SIGNAL SHORTED TO GROUND
(K21) IAT SIGNAL SHORTED TO (K4) SENSOR GROUND CIRCUIT
PCM
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, read the IAT Sensor voltage.
Is the voltage below 1.0 volt?
All
Yes
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
2
Turn the ignition off.
Disconnect the IAT harness connector.
Ignition on, engine not running.
With the DRBIII
t, read IAT Sensor voltage.
Is the voltage above 1.0 volt?
All
Yes
→ Replace the IAT Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K21) IAT Signal circuit at the IAT
Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (K21) IAT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 4
259
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (K21) IAT Sensor Signal circuit and the (K4)
Sensor ground circuit in the IAT Sensor harness connector.
Is the resistance below 100 ohms?
All
Yes
→ Repair the (K4) Sensor ground shorted to the (K21) IAT Signal
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 5
5
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
260
DRIVEABILITY - NGC
P0112-INTAKE AIR TEMPERATURE SENSOR LOW —
Continued
Symptom:
P0113-INTAKE AIR TEMPERATURE SENSOR HIGH
When Monitored and Set Condition:
P0113-INTAKE AIR TEMPERATURE SENSOR HIGH
When Monitored:
With the ignition on. Battery voltage greater than 10 volts.
Set Condition:
The Intake Air Temperature (IAT) sensor voltage at the PCM is greater
than 4.98 volts. One trip Fault.
POSSIBLE CAUSES
IAT SENSOR VOLTAGE ABOVE 4.6 VOLTS
(K21) IAT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
IAT SENSOR INTERNAL FAILURE
(K21) IAT SIGNAL CIRCUIT OPEN
(K4) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
With the DRBIII
t, read the IAT Sensor voltage.
Is the voltage above 4.6 volts?
All
Yes
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
2
Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K21) IAT Signal circuit in the IAT Sensor harness
connector.
Is the voltage above 5.2 volts?
All
Yes
→ Repair the short to battery voltage in the (K21) IAT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 3
261
DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the IAT harness connector.
Connect a jumper wire between the (K21) IAT Signal circuit and the (K4) Sensor
ground circuit in the IAT harness connector.
Ignition on, engine not running.
With the DRBIII
t, read IAT voltage.
Is the voltage below 1.0 volt?
All
Yes
→ Replace the IAT Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K21) IAT Signal circuit from the IAT Sensor harness
connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the open in the (K21) IAT Signal circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
5
Turn the ignition off.
Disconnect the IAT Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K4) Sensor ground circuit from the IAT Sensor
harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the open in the (K4) Sensor ground circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
6
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
262
DRIVEABILITY - NGC
P0113-INTAKE AIR TEMPERATURE SENSOR HIGH —
Continued
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