COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
Throttle Body
On-vehicle InspectionSystem Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Main Body ECU (Driver Side Junction Block Assembly)
Transmission information
Park (P) st ...
Cooling Fan Circuit
DESCRIPTION
The ECM turns on or off the fan relays using signals calculated from the engine
coolant temperature, air conditioning (ON/OFF), air conditioner refrigerant pressure,
engine speed, and vehicle speed signals.
The ECM switches the circuit of the ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT COOLING FAN OPERATION AT LOW TEMPERATURES (Below 83°C (181°F))
(a) Turn the ignition switch to ON.
(b) Check that the cooling fans stop.
If not, check the cooling fan relays and engine coolant temperature senso ...