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Transmission Fluid Temperature Gauge Inaccurate Or Inoperative (DIC Message)

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This procedure applies to automatic transmission models. Some imported manual transmission models may be equipped with transmission temperature monitoring. On automatic transmissions, transmission temperature sensor is part of transmission fluid pressure switch located on valve body. On manual transmission models, transmission temperature sensor is installed in place of transmission fluid fill plug.
  1. If Instrument Panel Cluster (IPC) diagnostic system check has been performed, go to next step. If IPC diagnostic system check has not been performed, see INSTRUMENT PANEL CLUSTER (IPC) DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to DLC and attempt to communicate with PCM. If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  3. View DTCs using scan tool. If scan tool shows that DTCs P0711, P0712 or P0713 are set in PCM, go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs are set, go to next step.
  4. Select IPC data display on scan tool. Monitor transmission fluid temperature. If scan tool displays -31 to 419°F (-40 to 215°C), go to next step. If scan tool does not display -31 to 419°F (-40 to 215°C), go to step  6 .
  5. Select transmission fluid temperature on DIC display. Compare scan tool display and transmission fluid temperature on DIC display. If readings are within 10°F (10°C), go to step  7 . If readings are not within 10°F (10°C), go to step  8 .
  6. Select PCM data display on scan tool. Monitor transmission fluid temperature. If scan tool displays -31 to 419°F (-40 to 215°C), go to step  8 . If scan tool does not display -31 to 419°F (-40 to 215°C), go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  7. Replace transmission temperature sensor. After replacement, go to step  9 .
  8. Replace IPC. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  9. Turn ignition off and reconnect all disconnected components and connectors. Turn ignition on. Go to INSTRUMENT PANEL CLUSTER (IPC) DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. If symptom still exists, return to step  2 .
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