Toyota Sienna Service Manual: 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 specified, replace the cooling fan relay.
(c) Install the relay to engine room relay block No. 1.
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 ...
Radiator
COMPONENTS
...
Other materials:
Problem symptoms table
RESULT LIST OF CHECK CAN BUS LINE
Symptom
Suspected Area
All ECUs and sensors connected to the CAN
communication system are not displayed on intelligent
tester
CAN Bus Line
The result of "CAN BUS WIRE CHECK" is "Open in
CAN Main Bus Lin ...
Throttle / Pedal Position Sensor / Switch "A"
Circuit Range / Performance Problem
DTC P0121 Throttle / Pedal Position Sensor / Switch "A"
Circuit Range / Performance Problem
HINT:
This DTC relates to the Throttle Position (TP) sensor.
DESCRIPTION
Refer to DTC P0120
DTC No.
DTC Detection Condition
Trouble Area
P0121
Differen ...
A/F sensor and ho2s monitors
(a) Preconditions
The monitor will not run unless:
2 minutes or more have elapsed since the engine
was started.
The Engine Coolant Temperature (ECT) is 75°C
(167°F) or more.
Cumulative driving time at a vehicle speed of 30
mph (48 km/h) or more exceeds 6 minutes.
Air-fuel ratio fe ...
