DIAGNOSIS SYSTEM 1. DESCRIPTION The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction in the ECU itself or in system circuits. The DTCs can be read through the DLC3 of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform troubleshooting. 2. CHECK DLC3 (a) Inspect the battery voltage. Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge the battery before proceeding. (b) Check the DLC3 (See page 3. FUNCTION OF INDICATOR LIGHT (a) When a problem occurs in the touch select 2-4 and high-low system, the 4HI and 4LO indicator lights on the combination meter assembly rapidly blink* to inform the driver of the problem.
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Toyota Tundra Owners Manual > Steps to take in an
emergency: If your vehicle needs to
be towed
If towing is necessary, we recommend having your vehicle towed by your Toyota dealer or commercial towing service, using a wheel-lift type truck or flatbed truck. Use a safety chain system for all towing, and abide by all state/ provincial and local laws. Situations when it is necessary to contact ...
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