ENGINE PERFORMANCE – Jeep Grand Cherokee Overland 2002 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.0L

4.0L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.0L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Overland 2002:

• (in pdc) transmission control relay
• (left rear of transmission) output speed sensor
• (on transmission valve body) transmission solenoid
• (right side of engine)
• +5v
• 3-4 shift sol
• A/c pres sig
• A/c system
• B22
• C18
• Ckp sens
• Cmp sens
• Coil drv 1
• Coil drv 2
• Coil drv 3
• Coil rail (right rear of engine)
• Cooling fan system
• Ect sens
• F991
• Fan rly ctrl
• Fuel injectors
• Fuse 10a
• Fuse 15a
• Fuse 30a
• Fused b+
• G103
• G60
• Gen field drv
• Generator
• Gov pres sens
• Gov pres sig
• Gov pres sol
• Ground
• Hot at all times
• Iac 1 drv
• Iac 2 drv
• Iac 3 drv
• Iac 4 drv
• Iat sens
• Ign sw out
• Inj 1 drv
• Inj 2 drv
• Inj 3 drv
• Inj 4 drv
• Inj 5 drv
• Inj 6 drv
• Instrument cluster, anti-lock brakes & transmission control systems (vehicle speed signal)
• K11
• K12
• K13
• K14
• K141
• K173
• K20
• K21
• K22
• K24
• K241
• K30
• K341
• K38
• K39
• K40
• K41
• K44
• K58
• K59
• K60
• K77
• K88
• K91
• K92
• K93
• Map sens
• Nca
• O2 sens 1/1
• O2 sens 1/2
• O2 sens 2/1
• O2 sens 2/2
• Oil pres sens
• Out spd sens
• P/n switch
• Park/neutral position switch (lower left side of transmission)
• Pnk
• Power distribution center (at right front corner of eng compt, next to battery)
• Powertrain control module (on right side of firewall)
• Red
• S102 (eng harn, near breakout at right side of engine)
• S109 (eng harn, near breakout for fuel inj 2)
• S122 (eng harn, near breakout at right side of engine)
• S126 (eng harn, near breakout for battery temp sensor)
• Sens ground
• Sensor ground
• Solenoid ctrl
• Spd sens gnd
• Starting system
• T13
• T14
• T20
• T25
• T41
• T54
• T60
• Tan
• Tan/pnk
• Tan/red
• Tcc sol
• Tcc sol ctrl
• Temp sig
• To spark plugs
• Tp sens
• Tr case pos
• Trans ctl rly
• Trans temp
• Transmissions system
• Vss signal
• Z81
• Z82

4.0L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.0L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Overland 2002:

• (eng harn, in trough near breakout for pcm)
• (eng harn, near break- out at right rear of eng compt)
• (eng harn, near breakout for capacitor) s105
• (eng harn, near breakout for fuel inj 5)
• (front body harn, in center spline, near breakout under driver's seat)
• (near breakout for capacitor) s123
• (on throttle body) idle air control motor
• (under driver's seat) g301
• A/c system
• Automatic shut down relay
• Camshaft position sensor (on right side of eng, near oil filter)
• Capacitor
• Crankshaft position sensor (on transmission bellhousing)
• Cruise control system
• Engine coolant temperature sensor (on thermostat housing)
• Engine oil pressure sensor (right rear of eng block)
• Fuel pump module (top of fuel tank)
• Fuel pump relay
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 30a
• Hot at all times
• Hot in run or start
• Intake air temperature sensor (in intake manifold plenum)
• Junction block (behind left side of dash)
• Manifold absolute position sensor (on side of throttle body)
• Nca
• No 1 drv
• No 2 drv
• No 3 drv
• No 4 drv
• Power distribution center (at right front corner of eng compt, next to battery)
• S107
• S112
• S128
• S131 (in trough near breakout for pdc)
• S315
• Throttle position sensor (on throttle body)

4.0L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.0L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Overland 2002:

• (bottom of steering column) diagnostic junction port
• (near breakout for oxygen sensors)
• (right rear of engine) g104
• (under left side of dash, near steering column)
• 1/1 2/1 o2 rly
• 1/1 o2 rly
• 2/1 o2 sens
• A/c system
• Asd relay ctrl
• Asd rly out
• Bat tem sens sig
• Battery temperature sensor (below battery tray)
• Brake sw sig
• C13
• Check engine ind
• Comp cl ctrl
• Cooling fans system
• Cruise control system
• D21
• D25
• D32
• Data link connector
• Evap emis
• Evap/purge solenoid (on left fender side shield)
• F42
• Fuel lev sensor
• Fuel pmp rly
• Fuse 10a
• Gen source
• Hot in run or start
• Instrument cluster
• Junction block (behind left side of dash)
• K106
• K107
• K125
• K226
• K25
• K29
• K299
• K31
• K51
• K512
• K52
• K99
• Leak det pmp
• Leak det pump
• Leak detection pump (below air cleaner housing)
• Nca
• Od off sw
• Oxygen sensor 1/1 (upstream) (in exhaust manifold front outlet)
• Oxygen sensor 1/2 (downstream) (in outlet of front mini catalytic converter)
• Oxygen sensor 2/1 (upstream) (in exhaust manifold rear outlet)
• Oxygen sensor 2/2 (downstream) (in outlet of rear mini catalytic converter)
• Oxygen sensor downstream relay
• Pci bus
• Pnk
• Power distribution center (at right front corner of eng compt, next to battery)
• Powertrain control module (on right side of firewall)
• S104
• S106
• S110
• S111
• S130 (eng harn, in breakout at right rear of engine compt)
• Sci receive
• Sci transmit
• Shift interlock system
• Shifter assembly
• Spd ctrl pow
• Spd ctrl sw
• Tan/red
• V32
• V35
• V36
• V37
• Vac sol ctrl
• Vent sol ctrl

4.7L

4.7L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.7L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Overland 2002:

• (eng harn, in trough near breakout for for capacitor 2)
• (eng harn, near breakout for coil on plug 4)
• (eng harn, near breakout for coil on plug 6)
• (eng harn, near breakout for fuel inj 1)
• (eng harn, near breakout for idle air control motor)
• (right side of engine)
• +5v
• A/c pres sig
• A/c pressure transducer
• B22
• C18
• Capacitor
• Ckp sens
• Cmp sens
• Coil drv 1
• Coil drv 2
• Coil drv 3
• Coil drv 4
• Coil drv 5
• Coil drv 6
• Coil drv 7
• Coil drv 8
• Coil on plug 1
• Coil on plug 2
• Coil on plug 3
• Coil on plug 4
• Coil on plug 5
• Coil on plug 6
• Coil on plug 7
• Coil on plug 8
• Cooling fans system
• Ect sens
• F991
• Fan rly ctrl
• Fuel injectors
• Fuse 10a
• Fused b+
• G103
• G60
• Gen field drv
• Generator
• Ground
• Hot at all times
• Iac 1 drv
• Iac 2 drv
• Iac 3 drv
• Iac 4 drv
• Iat sens
• Ign sw out
• Inj 1 drv
• Inj 2 drv
• Inj 3 drv
• Inj 4 drv
• Inj 5 drv
• Inj 6 drv
• Inj 7 drv
• Inj 8 drv
• K11
• K12
• K13
• K14
• K141
• K173
• K20
• K21
• K22
• K24
• K241
• K26
• K28
• K341
• K38
• K39
• K40
• K41
• K44
• K58
• K59
• K60
• K77
• K91
• K92
• K93
• K94
• K95
• K96
• K97
• K98
• Map sens
• Nca
• O2 sens 1/1
• O2 sens 1/2
• O2 sens 2/1
• O2 sens 2/2
• Oil pres sens
• P/n switch
• Power distribution center (at right front corner of eng compt, next to battery)
• Powertrain control module (on right side of firewall)
• S102
• S109
• S118
• S121
• S124
• Sens ground
• T41
• Tan
• Tan/pnk
• Tan/red
• Tp sens
• Tr case pos
• Transmissions system
• Transmissions, anti-lock brakes & instrument cluster systems (vehicle speed signal)
• Vss signal
• Z81
• Z82

4.7L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.7L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Overland 2002:

• (eng harn, in breakout for crank- shaft position sensor) s119
• (eng harn, in trough near breakout for pcm)
• (eng harn, near breakout at right rear of eng compt)
• (eng harn, near breakout for fuel inj 7) s107
• (eng harn, near breakout for input speed sensor)
• (eng harn, near breakout for pcm) s120
• (on throttle body) idle air control motor
• (under driver's seat) g301
• Automatic shut down relay
• Camshaft position sensor (front top of right cylinder head)
• Crankshaft position sensor (above starter motor)
• Cruise control system
• Engine coolant temperature sensor (near front of intake manifold)
• Engine oil pressure sensor (above oil filter)
• Fuel pump module (top of fuel tank)
• Fuel pump relay
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 30a
• Hot at all times
• Hot in run or start
• Intake air temperature sensor (in intake manifold plenum)
• Junction block (behind left side of dash)
• Manifold absolute position sensor (front of intake manifold)
• No 1 drv
• No 2 drv
• No 3 drv
• No 4 drv
• Power distribution center (at right front corner of eng compt, next to battery)
• S105
• S116
• S122
• S128
• S315
• Starting system
• Throttle position sensor (on throttle body)
• Transmission control system
• Transmission solenoid/trs assembly (on transmission valve body)

4.7L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Overland 2002

List of elements for 4.7L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Overland 2002:

• (bottom of steering column) diagnostic junction port
• (eng harn, in breakout for coil on plug 8) s112
• (eng harn, in breakout for oxygen sensors)
• (left side of engine) g104
• (right rear of engine compt)
• 1/1 2/1 o2 rly
• 1/1 o2 ctrl
• 2/1 o2 ctrl
• A/c system
• Asd relay ctrl
• Asd rly out
• Bat tem sens sig
• Battery temperature sensor (below battery tray)
• Brake sw sig
• C13
• Check engine ind
• Ckp sens sig
• Comp cl ctrl
• Cooling fans system
• Cruise control system
• D21
• D25
• D32
• Data link connector (under left
• Evap emis
• Evap/purge solenoid (on left fender side shield)
• F42
• Fuel lev sensor
• Fuel pmp rly
• Fuse 10a
• Gen source
• Hot in run or start
• Instrument cluster
• Junction block (behind left side of dash)
• K106
• K107
• K125
• K142
• K22
• K226
• K24
• K25
• K29
• K299
• K31
• K42
• K51
• K512
• K52
• K99
• Knock sens
• Knock sens 2
• Knock sensor (high output)
• Leak det pmp
• Leak det pump
• Leak detection pump (below air cleaner housing)
• Nca
• Oxygen sensor 1/1 (upstream) (below left exhaust manifold, in downpipe)
• Oxygen sensor 1/2 (downstream) (in outlet of front mini catalytic converter)
• Oxygen sensor 2/1 (upstream) (below right exhaust manifold, in downpipe)
• Oxygen sensor 2/2 (downstream) (in outlet of right mini catalytic converter)
• Oxygen sensor downstream relay
• Pci bus
• Pnk
• Power distribution center (at right front corner of eng compt, next to battery)
• Powertrain control module (on right side of firewall)
• S104
• S106
• S111
• S125 (eng harn, near breakout for pcm)
• S126
• S130 (eng harn, in breakout at right rear of eng compt)
• S131 (eng harn, in trough near breakout for pdc)
• S160
• S316
• Sci receive
• Sci transmit
• Sensor ground
• Shift interlock system
• Side of dash, near steering column)
• Spd ctrl pow
• Spd ctrl sw
• T10
• Tan/red
• Torque man req
• Torque req
• Tp sens sig
• Transmission control module (on right inner fender)
• V32
• V35
• V36
• V37
• Vac sol ctrl
• Vent sol ctrl
• W/ high output
• W/o high output