Toyota Sienna Service Manual: Diagnosis system

Toyota Sienna Service Manual / Air conditioning / Air conditioning system (for automatic air conditioning system) / Diagnosis system

1. CHECK DLC3

Diagnosis system

(a) The vehicle's ECM uses the ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

HINT: Connect the cable of the intelligent tester to the DLC3, turn the ignition switch to the ON position and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.

If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.

If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.

Diagnosis system

NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors.

Terminals of ecu

1. A/C AMPLIFIER (a) Waveform 1: (b) Waveform 2: (c) Waveform 3: ...

Dtc check / clear

1. DTC CHECK (SENSOR CHECK) (a) After the indicator check is completed, the system enters the DTC check mode automatically. (b) Read the codes displayed on the panel. Refer to the list of co ...

Other materials:

ABS Warning Light does not Come ON
WIRING DIAGRAM See page BC-47. INSPECTION PROCEDURE 1 INSPECT ABS WARNING LIGHT (a) Disconnect the skid control ECU connector. (b) Turn the ignition switch to the ON position. (c) Check that the ABS warning light comes on. OK: ABS warning light comes on. HINT: If troubleshooting has be ...

Shift Solenoid "E" Control Circuit
DESCRIPTION Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, SL3, S4 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM cont ...

Seat belt warning system
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