Buick Regal: Description and Operation
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Cooling Fan Description and Operation
System Overview
The engine cooling fan system consists of 2 electric cooling fans and 3 fan
relays. The cooling fan relays
are arranged in a series/parallel (S/P) configuration. This allows the engin
Cooling System Description and Operation
Engine Coolant Indicators
The instrument panel cluster (IPC) shows the engine temperature on the
temperature gauge. The
value is sent on the data communication line from engine control module (EC
Firing Order and Cylinder Identification
NOTE: This information is intended as a quick reference for firing
order and
cylinder identification only. The information provided covers many
vehicles and may include some information that does not
SEE MORE:
DTC B2455 (IOR/IOU/IOT/IOS)
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Refer to Diagnostic Procedure Instructions provide an overview of each
diagnostic category.
DTC Descr
Auxiliary Water Pump Replacement (FWD)
Removal Procedure
1. Drain the cooling system.
2.
Steering Gear Heat Shield (2) - Remove.
3.
Heater Outlet Hose Clamp (1) - Disengage.
4. Heater Outlet Hose (2) @ Auxiliary Water Pump - Remove.
5.
Heater Coolant Pump Hose Clamp (1) - Disengage.
6. Heater Coolant Pump Hose (2) @ Auxiliary Wa
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