LEMON Manuals
: Even more car manuals for everyone
Home
>>
Jeep
>>
1989
>>
Cherokee Sport, 4WD, Automatic
>>
Repair and Diagnosis
>>
Engine Performance
>>
Testing & Diagnosis
>>
EGR System
EGR System
Expand All (for easy ctrl-f)
Collapse All
Description
Operation
EGR System
Notes
2.5L Cherokee, Comanche & Wagoneer
2.5L Wrangler
4.0L Cherokee, Comanche & Wagoneer
4.2L Wrangler & 5.9L Grand Wagoneer
EGR Valve
Coolant Temperature Override (CTO) Switch
4.2L & 5.9L
Thermal Vacuum Switch (TVS)
4.2L & 5.9L
Forward Delay Valve
Testing Note
EGR System Testing
2.5L (CHEROKEE, COMANCHE & WAGONEER)
2.5L (Wrangler)
4.0L (CHEROKEE, COMANCHE & WAGONEER)
EGR Valve Testing
2.5L & 4.0L Only
Vacuum Transducer Test
2.5L & 4.0L Only
Valve Opening Test
4.2L & 5.9L Only
Valve Closing Test
4.2L & 5.9L Only
CTO Switch Testing
Coolant Temperature Override (CTO) Switch (4.2L & 5.9L Only)
TVS Switch Testing
Thermal Vacuum Switch (TVS)
Forward Delay Valve Test
5.9L Only