Toyota Sienna Service Manual: Cooling fan ecu
ON-VEHICLE INSPECTION
1. INSPECT COOLING FAN ECU
(a) Inspect the input voltage.
(1) Disconnect the cooling fan ECU connector.
(2) Turn the ignition switch to the ON position.
Check the voltage of the +B terminal of the disconnected wire harness side connector.
Standard voltage: 9 to 14 V
If the result is not as specified, inspect the power source system (fusible link, fuse, wire harness and relay).
(b) Inspect the cooling fan motor (See page CO-19).
(c) Measure the resistance between terminals RFC (ECM) and SI (cooling fan ECU) of the wire harness side connectors.V
HINT:
- If the fan does not operate, there may be a short circuit.
- If the fan remains operating, there may be an open circuit.
(d) Inspect the ECM power source circuit and ground circuit.
Cooling fan motor
On-vehicle inspection
1. No. 1 Cooling fan motor
(A) check that the motor turns smoothly when the
battery is connected to the fan motor connector.
(B) measure the current while the motor is ...
Cooling fan relay
On-vehicle inspection
1. Cooling fan relay
(a) Remove the relay from engine room relay block No.
1.
(b) Measure the resistance of the relay.
Standard resistance
If the result is not as ...
Other materials:
How to proceed with
troubleshooting
HINT:
Troubleshoot in accordance with the procedures on the
following pages
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
3 INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX
COMMUNICATION SYSTEM (BEAN)
Use the intelligent tester to check for normal ...
Touch screen gestures
Operations are performed by touching the screen directly with your
finger.
Operation method
Outline
Main use
Touch
Quickly touch and
release once.
Changing and selecting
various settings.
Drag*
Touch the screen
with your ...
Programming the HomeLink® (for U.S.A. owners)
The HomeLink® compatible transceiver in your vehicle has 3 buttons
which can be programmed to operate 3 different devices. Refer to the
programming method below appropriate for the device.
Indicator light
Buttons
Programming the HomeLink®
Point the remote control for
the d ...
