Chrysler Pacifica CS 2004 Service Manual page 58

DRIVEABILITY - NGC
P0073-AMBIENT TEMP SENSOR HIGH —
TEST
3 Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Connect a jumper wire between the (K145) AAT Signal circuit and the (K167) Sensor
ground circuit in the Ambient Air Temperature Sensor harness connector.
Ignition on, engine not running.
With the DRBIII , read Ambient Air Temperature Sensor voltage.
Is the voltage below 1.0 volt?
Yes → Replace the Ambient Air Temperature Sensor.
→ Go To 4
No
4 Turn the ignition off.
Disconnect the Ambient Air Temperature 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 (K25) AAT Signal circuit from the Ambient Air
Temperature Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?
Yes → Go To 5
→ Repair the open in the (K25) AAT Signal circuit.
No
5 Turn the ignition off.
Disconnect the Ambient Air Temperature 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 Ambient Air
Temperature Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?
Yes → Go To 6
→ Repair the open in the (K4) Sensor ground circuit.
No
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.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Continued
52
APPLICABILITY
All
All
All
All