ENGINE PERFORMANCE – Jeep Grand Cherokee Overland 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.0L

4.0L, Engine Performance Wiring Diagram (1 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.0L, Engine Performance Wiring Diagram (1 of 3) for Jeep Grand Cherokee Overland 2003:

• (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
• Engine oil pressure sensor (on right rear side of eng block)
• 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 (near breakout for g103)
• S109 (eng harn, near breakout for fuel inj 2)
• S122 (near breakout for g103)
• S126 (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 Diagram (2 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.0L, Engine Performance Wiring Diagram (2 of 3) for Jeep Grand Cherokee Overland 2003:

• (in center spline, near breakout for g301)
• (in trough near breakout for pcm)
• (near breakout at right rear of eng compt)
• (near breakout for fuel inj 5)
• (near breakout for g103) s123
• (near breakout for g104) s105
• (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
• Cooling fans system
• Crankshaft position sensor (at left rear side of eng block, on transmission bellhousing)
• Cruise control system
• Engine coolant temperature sensor (at top front of eng, on thermostat housing)
• 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, near front of throttle body)
• Junction block (behind left side of dash)
• Manifold absolute pressure 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 Diagram (3 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.0L, Engine Performance Wiring Diagram (3 of 3) for Jeep Grand Cherokee Overland 2003:

• (bottom of steering column) diagnostic junction port
• (in breakout for oxygen sensors)
• (near breakout for oxygen sensors)
• (on left fender side shield, forward of evap canister)
• (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 (in center of battery tray)
• Brake sw sig
• C13
• Check engine ind
• Comp cl ctrl
• Cruise control system
• D21
• D25
• D32
• Data link connector
• Duty cycle evap/purge solenoid
• Evap emis
• 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 (in left rear quarter panel)
• Nca
• Od off sw
• Oxygen sensor 1/1 (upstream) (before front catalytic converter)
• Oxygen sensor 1/2 (downstream) (after front catalytic converter)
• Oxygen sensor 2/1 (upstream) (before rear catalytic converter)
• Oxygen sensor 2/2 (downstream) (after rear 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 (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 Diagram (1 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.7L, Engine Performance Wiring Diagram (1 of 3) for Jeep Grand Cherokee Overland 2003:

• (at right side of engine)
• (behind right side of radiator support)
• (near breakout for coil on plug 4)
• (near breakout for coil on plug 6)
• (near breakout for for capacitor)
• (near breakout for idle air control motor)
• +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
• Engine oil pressure sensor (on lower left front of eng block, above oil filter)
• 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)
• 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 Diagram (2 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.7L, Engine Performance Wiring Diagram (2 of 3) for Jeep Grand Cherokee Overland 2003:

• (in breakout for crank- shaft position sensor) s119
• (in center spline, near breakout for g301) s315
• (in intake manifold plenum, near left side of throttle body)
• (in trough near breakout for pcm)
• (near breakout at right rear of eng compt)
• (near breakout for fuel inj 7) s107
• (near breakout for input speed sensor)
• (near breakout for pcm) s120
• (on throttle body) idle air control motor
• (under driver's seat) g301
• Automatic shut down relay
• Camshaft position sensor (on front top of right cylinder head)
• Cooling fans system
• Crankshaft position sensor (on right side of eng block, above starter motor)
• Cruise control system
• Engine coolant temperature sensor (near front of intake manifold)
• 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
• 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
• Starting system
• Throttle position sensor (on throttle body)
• Transmission control system
• Transmission solenoid/trs assembly (on transmission valve body)

4.7L, Engine Performance Wiring Diagram (3 of 3) for Jeep Grand Cherokee Overland 2003

List of elements for 4.7L, Engine Performance Wiring Diagram (3 of 3) for Jeep Grand Cherokee Overland 2003:

• (bottom of steering column) diagnostic junction port
• (in breakout for oxygen sensors)
• (left side of engine) g104
• (near breakout at right rear of eng compt)
• (near breakout for coil on plug 8) s112
• (on left fender side shield, forward of evap canister)
• 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 (in center of battery tray)
• Brake sw sig
• C13
• Check engine ind
• Ckp sens sig
• Comp cl ctrl
• Cruise control system
• D21
• D25
• D32
• Data link connector (under left
• Duty cycle evap/purge solenoid
• Evap emis
• 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) (before left catalytic converter)
• Oxygen sensor 1/2 (downstream) (after left catalytic converter)
• Oxygen sensor 2/1 (upstream) (before right catalytic converter)
• Oxygen sensor 2/2 (downstream) (after right 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 (near breakout for pcm)
• S126
• S130 (in breakout at right rear of eng compt)
• S131 (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