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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:

Back Door Courtesy Switch Circuit
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Precaution
1. INITIALIZATION NOTICE:  Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM.  Perform REGISTRATION (VIN registration) when replacing the ECM. HINT: Initialization cannot be completed by only removing the batt ...

Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem
DTC P0121 Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem HINT: This DTC relates to the Throttle Position (TP) sensor. DESCRIPTION Refer to DTC P0120 DTC No. DTC Detection Condition Trouble Area P0121 Differen ...

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