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Test AH, Outside Temperature Always Reads 135-140°F (57-60°C)

  1. Verifying Condition: Turn ignition on. Read outside temperature. Remove No. 1 fuse (15-amp) from fuse panel below instrument panel, left of steering column. Fuse is located in lower right corner of fuse panel. Instrument cluster should go blank.
  2. After 30 seconds, reinstall fuse, and read outside temperature. If reading is correct, refer to pinpoint index for further testing. See Figure . If reading is incorrect, proceed to step 3).
  3. Checking Connector: Disconnect 16-pin Black connector at left rear corner of engine compartment at rear of wheel well. Turn ignition on. Remove No. 1 fuse (15-amp) from fuse panel, reinstall after 30 seconds and read outside air temperature.
  4. If reading is 135-140°F (57-60°C), proceed to step 5). If reading is -40°F (-40°C), proceed to step 7).
  5. Checking Instrument Cluster: Remove instrument cluster finish panel. Disconnect C1 connector from instrument cluster. See Figure . Using small screwdriver, release pin No. 1 (Pink/Orange wire) from C1 connector. This is sensor ground. Reinstall C1 connector on instrument cluster. Turn ignition on.
  6. Remove No. 1 fuse (15-amp) from fuse panel, reinstall after 30 seconds and read outside air temperature. If reading is 135-140°F (57-60°C), replace instrument cluster. Install door pillar sticker to indicate instrument cluster has been replaced. If reading is -40°F (-40°C), repair wiring between instrument cluster and C1 connector.
  7. Checking Air Temperature Sensor Connector: Reinstall pin No. 1 in C1 connector, and install connector on instrument cluster. Disconnect electrical connector from air temperature sensor at radiator support. Air temperature sensor has a Brown connector with Dark Blue/Yellow and Pink/Orange wires.
  8. Turn ignition on. Remove No. 1 fuse (15-amp) from fuse panel, reinstall after 30 seconds and read outside air temperature. If reading is 135-140°F (57-60°C), repair wiring between instrument cluster C1 connector and air temperature sensor. If reading is -40°F (-40°C), proceed to step 9).
  9. Checking Air Temperature Sensor: Using ohmmeter, measure resistance between air temperature sensor terminals. Resistance should be 33,000-47,000 ohms at 60-70°F (16-21°C). If reading is within specifications, return to step 1), and retest system. If resistance is not within specifications, replace air temperature sensor.
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