Outside Temperature Display Inaccurate/MIL ON/DTC P0071
NUMBER: 08-012-08GROUP: Electrical
DATE: March 19, 2008
SUBJECT:
Outside Temperature Displayed is Inaccurate or MIL DTC P0071
OVERVIEW:
This bulletin involves inspecting the Ambient Air Temperature (AAT) sensor connector for corrosion, replace connector and/or AAT sensor if necessary and reroute wire to sensor. Wire routing to sensor may pull on connection at the AAT sensor and cause seal to unseat allowing moisture in.
MODELS:
2008 (RI) Town & Country/Grand Voyager
NOTE:
This bulletin applies to vehicles built before February 15, 2008 (MDH 0215XX).
SYMPTOM/CONDITION:
Some customers may experience intermittent MIL illumination and/or the outside temperature displayed is not correct. Further investigation by technician may find DTC P0071 - Ambient Air Temperature Sensor Performance.
DIAGNOSIS:
If the customer experiences the Symptom/Condition, perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS/EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1. Disconnect and isolate the battery negative cable.
2. Raise the vehicle on a hoist.
NOTE:
The ambient air temperature (AAT) sensor is mounted to the lower radiator support behind front fascia.
3. Disconnect the wire harness connector from the ambient temperature sensor.
4. Inspect the sensor connector for corrosion. Does the sensor connector show any signs of corrosion?
a. Yes >>> Proceed to Step # 5.
b. No >>> Proceed to Step # 10
NOTE:
If necessary, refer to the detailed wire splice information available in DealerCONNECT > TechCONNECT under: Wiring Tab > Wiring Diagram Information > Wire > Standard Procedure > Wire Splicing for detailed instructions.
5. Replace the MT sensor connector using p/n 05014002AA. Cut the VT/LG wire (Cavity # 1) close to the connector.
a. Cut one of the new terminal wires (supplied in kit p/n 05014002AA) to an appropriate length.
b. Remove 0.5 in. (13 mm) of insulation from each of the wires.
c. Place a piece of sealant lined heat shrink tubing, (supplied in kit p/n 05014002AA), on one side of the wire.
d. Place the strands of wire overlapping each other inside of the splice band.
e. Using crimping tool, p/n 10042 (or equivalent) crimp the splice band and wires together.
f. Solder the connection together using rosin core type solder only.
g. Center the heat shrink tubing over the joint and heat using a heat gun, heat the joint until the tubing is tightly sealed and sealant comes out of both ends of the tubing.
6. Install the new terminal in the new connector (supplied in kit p/n 05014002AA) in cavity # 1.
7. Cut the VT/BR wire (Cavity # 2) close to the connector.
a. Cut one of the new terminal wires (supplied in kit p/n 05014002AA) to an appropriate length.
b. Remove 0.5 in. (13 mm) of insulation from each of the wires.
c. Place a piece of sealant lined heat shrink tubing, (supplied in kit p/n 05014002AA), on one side of the wire.
d. Place the strands of wire overlapping each other inside of the splice band.
e. Using crimping tool, p/n 10042 (or equivalent) crimp the splice band and wires together.
f. Solder the connection together using rosin core type solder only.
g. Center the heat shrink tubing over the joint and heat using a heat gun, heat the joint until the tubing is tightly sealed and sealant comes out of both ends of the tubing.
8. Install the new terminal in the new connector in cavity # 2.
9. Inspect the AAT sensor for corrosion. Does the AAT sensor show any signs of corrosion?
a. Yes >>> Replace sensor with p/n 05149025AA. Proceed to Step # 10
b. No >>> Proceed to Step # 10
10. Clean and dry (with compressed air) AAT sensor and connector terminals.
11. Attach connector to AAT sensor.
12. Do NOT place wire harness behind retainer (Fig 1).
NOTE:
If the wire harness is hooked behind retainer, this may pull on connection to the AAT and cause seal to unseat allowing moisture in.
13. Lower the vehicle.
14. Connect the negative battery cable.
NOTE:
Temperature display may not be accurate until vehicle is driven for 5 minutes at 25 MPH (40 KMH).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.