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 Service Manual > Airbag System: Short in Passenger Side Airbag Variable Vent Hole Squib Circuit (B181A-B181D)
DESCRIPTION The variable vent hole squib circuit consists of the airbag sensor assembly and instrument panel passenger without door airbag assembly. The circuit instructs the SRS to deploy when the deployment conditions are met. These DTCs are stored when a malfunction is detected in the variable ve ...
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