Jeep Cherokee (XJ): Diagnosis and testing
Jeep Cherokee (XJ) 1984 - 2001 Service Manual > Cooling system > Diagnosis and testing
- On-board diagnostics (OBD). Accessory drive belt diagnosis. Preliminary checks
- Radiator coolant flow check. Cooling system-testing for leaks. Viscous fan drive
- Electric cooling fan. Radiator cap-to-filler neck seal-pressure relief check. Radiator cap-pressure testing
- Coolant-low level aeration. Deaeration
Cooling system
DESCRIPTION
The cooling system regulates engine operating temperature.
It allows the engine to reach normal operating
temperature as quickly as possible, maintains
normal operatin ...
On-board diagnostics (OBD). Accessory drive belt diagnosis. Preliminary checks
On-board diagnostics (OBD)
COOLING SYSTEM RELATED DIAGNOSTICS
The Powertrain Control Module (PCM) has been
programmed to monitor the certain following cooling
system components:
If the en ...
Other materials:
Power grounds. Power steering pressure switch-
pcm input. Sensor return-pcm input
Power grounds
OPERATION
The Powertrain Control Module (PCM) has 2 main
grounds. Both of these grounds are referred to as
power grounds. All of the high-current, noisy, electrical
devices are connected to these grounds as well as
all of the sensor returns. The sensor return comes
into the senso ...