Diagnostic Aids

The driver information center (DIC), if equipped, will display 'TRANSMISSION HOT- Idle Engine' when the TFT reaches 132°C (270°F). The TFT on the scan tool should rise steadily to a normal operating temperature, and then stabilize.

Ask the customer whether their typical day-to-day driving include:

• Trailer towing
• Hauling or vehicle over-loading
• Hot climate driving
• Extended idling
• Extreme off-road conditions

Trailer towing should occur in D4. Ensure the engine cooling system is functioning normally.