Toyota Sienna Service Manual: Terminals of ECU

Initialization

1. ZERO POINT CALIBRATION NOTICE: Make sure that the front passenger seat is not occupied before performing the operation. HINT: Perform the zero point calibration and sensitivity check if any o ...

Diagnosis system

1. CHECK DLC3  The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and meets the ISO 15765-4 format. NOTICE: *: Before mea ...

Other materials:

Installation
1. INSTALL BRAKE VACUUM CHECK VALVE ASSEMBLY (a) Install the brake vacuum check valve assembly and check valve grommet to the brake booster assembly. 2. INSTALL BRAKE BOOSTER GASKET (a) Install a new brake booster gasket to the brake booster with master cylinder. 3. INSTALL BRAKE MASTER CYLI ...

ECM Power Source Circuit
DESCRIPTION When the ignition switch is turned to the ON position, the battery voltage is applied to terminal IGSW of the ECM. The ECM MREL output signal causes a current to flow to the coil, closing the contacts of the EFI relay and supplying power to terminal +B of the ECM. If the igniti ...

Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION When turning the ignition switch to the ON position, the combination meter assembly communicates with the supplemental restraint system by the multiplex communication system. Unless the driver side seat belt is fastened, the combination meter assembly will turn on the seat belt ...