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Toyota Sienna Service Manual: For vehicles equipped with traction control (trac) system

Toyota Sienna Service Manual / Introduction / Repair instruction / Precaution / For vehicles equipped with traction control (trac) system

When using a 2-wheel drum tester such as a speedometer tester or chassis dynamometer, etc., or jacking up the front wheels and driving the wheels, always push in the TRAC cut ("TRAC OFF") switch and turn the TRAC system OFF.

FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYSTEM
FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYSTEM

(a) Confirm TRAC system is OFF

(1) Press the TRAC cut ("TRAC OFF") switch.

(2) Check that the TRAC OFF indicator light comes on when the TRAC system is turned OFF by the TRAC cut switch.

HINT:

The SLIP indicator light should always operate right after the engine is restarted.

(3) Begin measurements.

(4) Press the TRAC cut switch to turn the TRAC to the operative mode and check that the TRAC OFF indicator light goes off.

HINT: The SLIP indicator light blinks when the TRAC system in operating.

The SLIP indicator light should always operate right after the engine is restarted
The SLIP indicator light should always operate right after the engine is restarted.

When servicing full-time 4wd vehicles
The full-time 4WD SIENNA is equipped with the open center differential system. If incorrect preparations or test procedures are used, the test will not only be unsuccessful, but may be dangerous ...

For vehicles equipped with vehicle stability control (vsc) system
(a) Notices when using drum tester Notices when using drum tester. (1) When using a drum tester, be sure to start the engine with the ignition switch OFF, and connect SST to the terminals TS ...

Other materials:

Terminals of ECU
1. INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)  Disconnect the B6, B7 and B9 ECU connectors. Disconnect the 1A, 1C, 1K, 1L and 1P J/B connectors. Check the voltage or resistance according to the value(s) in the table below (wire harness side connector). ...

Open in Front Passenger Side Squib 2nd Step Circuit
DTC B1186/58 Open in Front Passenger Side Squib 2nd Step Circuit DESCRIPTION The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front passenger airbag assembly. The circuit instructs the SRS to deploy when deployment conditions are met. ...

Lock Switch Circuit
DESCRIPTION Each of the left and right seats has lock switches that detect the lock condition of the seat legs to the floor when the seat is in the original or folded-down state. If any of the lock switches detect an unlock condition, the 3rd SEAT indicator on the combination meter will come ...

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