Catera V6-3.0L VIN R (1997)
Coolant Temperature Sensor/Switch (For Computer): Customer Interest
Coolant Temperature Gauge - False Overheat Indication
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 01-06-02-005
Date: July, 2001
TECHNICAL
Subject:
Engine Coolant Temperature Gauge Reads In Red Zone And/Or Overheat Light On (Replace Coolant Temperature Gauge Sensor)
Models:
1997-2001 Cadillac Catera
Condition
Some customers may comment that the temperature gauge reads in the red zone and/or the overheat light is on. The vehicle does not overheat.
Cause
This condition may be caused by an internal malfunction of the coolant temperature gauge sensor.
The faulty sensors are stamped "SPAIN" with a rectangle above the word on one of the brass hexagon flats.
Correction
Normal diagnosis, including the use of SI2000 and the Tech 2 should be performed to determine if the vehicle is in a true overheat condition. Refer to
Engine Coolant Temperature Gauge Inaccurate or Inoperative and Engine Coolant Temperature Indicator Always On in the Service Manual.
Coolant Temperature Gauge Sensor Replacement
1.
Partially drain the cooling system. Refer to Draining and Filling Cooling System in the Service Manual.
2.
Remove the intake plenum. Refer to Intake Plenum Replacement in Engine Mechanical - 3.0L (L81) in the Service Manual.
3.
Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical - 3.0L (L81) in the Service Manual.
4.
Disconnect the engine coolant temperature sensor (2) electrical connector.
5.
Remove and discard the engine coolant temperature sensor (2).
Important:
Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not
use paints, lubricants. or corrosion inhibitors unless specified. These coatings affect fastener torque.
Important:
The new GOOD sensor will have "VDO" stamped on one of the brass hexagon flats.
