Jeep Cherokee (XJ): Brakes
- Base brake system
- Description and operation
- Diagnosis and testing
- Service procedures
- Removal and installation
- Disassembly and assembly
- Cleaning and inspection
- Adjustments
- Specifications. Special tools
- Antilock brakes
8 1/4 AXLES
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Other materials:
Powertrain control module (PCM)
DESCRIPTION
The Powertrain Control Module (PCM) is located
in the engine compartment (Fig. 1). The PCM is
referred to as JTEC.
OPERATION
The PCM operates the fuel system. The PCM is a
pre-programmed, triple microprocessor digital computer.
It regulates ignition timing, air-fuel ratio,
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