Toyota Corolla (E120): Circuit description

The cruise control ecu assy power source supplies power to the actuator and sensors, etc., When terminal gnd and the case of the cruise control ecu assy are grounded.

Wiring diagram

Inspection procedure

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    Transmitter battery
    Replacement 1. Replace transmitter battery Notice: special caution should be taken for handling each component as they are precision electronic components. Using a screwdriver, pry out the transmitter case. Notice: do not forcibly pry out the case. Hint: tape the screwdriver tip ...

    Replacement
    1. Remove console box sub–assy rear 2. Remove parking brake lever sub–assy 3. Remove exhaust pipe assy front 4. Remove front floor heat insulator no.1 Remove the 3 nuts and front floor insulator no.1. 5. Remove front floor heat insulator no.2 Remove the 2 nuts and front ...

    Inspection procedure
    1 Inspect parking brake switch circuit Check for open and short circuit in parking brake switch circuit 2 Inspect brake fluid level warning switch circuit Check the brake fluid level in reservoir.  check for open and shot circuit in brake fluid level warning switch circuit ...