Jeep Cherokee (XJ): Rear window defogger system
Jeep Cherokee (XJ) 1984 - 2001 Service Manual > Electrically heated systems > Rear window defogger system
- General information. Description and operation. Diagnosis and testing
- Service procedures. Removal and installation
General information. Description and operation. Diagnosis and testing
General information
Introduction
An electrically heated rear window defogger and
electrically heated outside rear view mirrors are
available factory-installed options on this model.
Refer to 8W-4 ...
Other materials:
Modes of operation
OPERATION
As input signals to the Powertrain Control Module
(PCM) change, the PCM adjusts its response to the
output devices. For example, the PCM must calculate
different injector pulse width and ignition timing for
idle than it does for wide open throttle (WOT).
The PCM will operate in two ...