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Test 83A - OTIS Ambient Temperature Sensor

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER  section in this article. Perform TEST VER-1  VERIFICATION TEST after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Using scan tool, read outside temperature. If scan tool does not display 185°F, go to step 4). If scan tool displays 185°F, go to next step.
  2. Disconnect ambient (outside) temperature sensor connector. Sensor is located behind front bumper, left of center. Turn ignition off, then back on. If scan tool temperature display drops to -70°F, replace ambient temperature sensor. If scan tool temperature display does not drop to-70°F, go to next step.
  3. Turn ignition off. Disconnect Body Control Module (BCM) Gray connector. BCM is located behind right kick panel. Using scan tool in ohmmeter mode, check resistance on BCM Gray connector terminal No. 10 (Violet/Light Green wire). If resistance is less than 100 ohms, repair short to ground in Violet/Light Green wire. If resistance is 100 ohms or greater, replace BCM.
  4. Disconnect ambient (outside) temperature sensor connector. Sensor is located behind front bumper, left of center. If scan tool does not display -70°F, go to TEST 84A  . If scan tool displays -70°F, go to next step.
  5. Connect a jumper wire between ambient temperature sensor connector terminals No. 1 (Gray/Tan wire) and No. 2 (Violet/Light Green wire). Turn ignition off, then back on. Using scan tool, read outside temperature. If scan tool displays 183°F, replace ambient temperature sensor. If scan tool does not display 183°F, go to next step.
  6. Connect jumper wire between chassis ground and ambient temperature sensor connector terminal No. 2 (Violet/Light Green wire). Turn ignition off, then back on. If scan tool displays 183°F, go to step 8). If scan tool does not display 183°F, go to next step.
  7. Leave jumper wire connected. Turn ignition off. Disconnect Body Control Module (BCM) Gray connector. BCM is located behind right kick panel. Using scan tool in ohmmeter mode, check resistance of BCM Gray connector terminal No. 10 (Violet/Light Green wire). If resistance is 5 ohms or greater, repair open Violet/Light Green wire. If resistance is less than 5 ohms, replace BCM.
  8. Turn ignition off. Disconnect Body Control Module (BCM) Bone connector. BCM is located behind right kick panel. Connect a jumper wire between ambient temperature sensor connector terminal No. 1 (Gray/Tan wire) and chassis ground. Go to next step.
  9. Using scan tool in ohmmeter mode, check resistance of BCM Bone connector terminal No. 15 (Gray/Tan wire). If resistance is 5 ohms or greater, repair open Gray/Tan wire. If resistance is less than 5 ohms, replace BCM.
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