Maintenance Section
218
Thermostat Valve (optional) -
Check
Thermostat Valve Function
A thermostat valve is provided in the transmission oil
cooling line to shorten the oil warming-up time in
cold weather.
The valve installation of shall be in accordance with
the picture below.
CAUTION
Incorrect assembly of the Thermostat Valve can
result in oil leak and/or overheating of the
transmission.
Failure detected by a defective
thermostat valve part:
1) Fault occurred with the internal thermostat
closed: in the initial operation, the transmission
oil gauge exceeds red line and B7 error code
appears on the transmission display.
2) Fault occurred with the internal thermostat open:
same as without a thermostat valve. It takes long
to preheat the transmission oil but no further
impact on the vehicle.
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