ENGINE PERFORMANCE – Jeep Grand Cherokee Laredo 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.0L

4.0L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Laredo 1999

List of elements for 4.0L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Laredo 1999:

• (engine harn, right rear of engine compt)
• (right side of engine)
• +5v
• 3-4 shift sol
• Asd rly out
• C24
• Ckp sens
• Cmp sens
• Coil drv 1
• Coil drv 2
• Coil drv 3
• Cooling fan system
• Ect sens
• F991
• Fan rly ctrl
• Fuel injectors
• Fuse 10a
• Fuse 15a
• Fuse 30a
• Fused b+
• G120
• 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 and transmission control systems (vehicle speed signal)
• K11
• K12
• K13
• K14
• K141
• K20
• K21
• K22
• K24
• K241
• K30
• K341
• K38
• K39
• K40
• K41
• K44
• K58
• K59
• K60
• K88
• K91
• K92
• K93
• Map sens
• O2 sens 1/1
• O2 sens 1/2
• O2 sens 2/1
• O2 sens 2/2
• Oil pres sens
• Out spd sens
• Output speed sensor (left rear of trans- mission)
• P/n switch
• Park/ neutral position switch (lower left side of transmission)
• Pnk
• Power distribution center (next to battery)
• Powertrain control module (on right side of firewall)
• Rail coil (right rear of engine)
• S102
• S109 (top of engine in fuel injector harness)
• S122 (top of trans)
• S126 (right rear fender area)
• Sens ground
• Sensor ground
• Solenoid ctrl
• Spd sens gnd
• Starting system
• T121
• T13
• T14
• T22
• T24
• T25
• T54
• Tan
• Tan/pnk
• Tan/red
• Tcc sol
• Tcc sol ctrl
• Temp sig
• Tp sens
• Trans ctl rly
• Trans temp
• Trans- mission control relay
• Trans- mission solenoid (on trans- mission valve body)
• Var force sol
• Vss signal
• Z11
• Z12

4.0L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Laredo 1999

List of elements for 4.0L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Laredo 1999:

• (engine harn, right rear of engine compt)
• (front body harn, left side of dash)
• (on throttle body) idle air control motor
• (right rear fender area)
• (under driver's seat) g300
• Automatic shut down relay
• Camshaft position sensor (near oil filter)
• Crankshaft position sensor (on transmission bellhousing)
• Cruise control system
• Engine coolant temperature sensor (on thermostat housing)
• Engine oil pressure sensor (right rear of engine)
• Fuel pump module (top of fuel tank)
• Fuel pump relay
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 30a
• Hot at all times
• Hot in start or run
• Intake air temperature sensor (in intake manifold plenum)
• Junction block (behind left side of dash)
• Manifold absolute position sensor (side of throttle body)
• No 2 drv
• No 3 drv
• No 4 drv
• No1 drv
• Power distribution center (next to battery)
• S105 (in map sensor break- out)
• S107 (left side engine harn)
• S112
• S128
• S131 (near pdc)
• S307
• S315
• Throttle position sensor (on throttle body)

4.0L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Laredo 1999

List of elements for 4.0L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Laredo 1999:

• (bottom of steering column) diagnostic junction port
• (in breakout to 2/2 oxygen sensor harness)
• (in breakout to oxygen sensors)
• (near breakout to o2 sensors)
• (on left fender side shield)
• (right rear of engine) g117
• (top of engine, in fuel injector harness)
• (under left side of dash, near steering column)
• 1/1 2/1 o2 rly
• 1/2 2/2 o2 rly
• A/c pres sig
• A/c system
• Asd relay ctrl
• Asd rly out
• Bat tem sens sig
• Battery temperature sensor (below battery tray)
• Brake sw sens
• C13
• C18
• Calif
• Check engine ind
• Comp cl ctrl
• Cruise control system
• D21
• D25
• D32
• Data link connector
• Duty cycle evap/purge solenoid
• Evap emis
• Ex calif
• Ex. calif.
• F42
• Fuel lev sensor
• Fuel pmp rly
• Fuse 10a
• Fuse 20a
• G302 (below center console)
• Gen source
• Hot at all times
• Hot in start or run
• Instrument cluster
• Junction block (behind left side of dash)
• K106
• K107
• K151
• K21
• K226
• K25
• K251
• K29
• K31
• K51
• K52
• Leak det pmp
• Leak det pump
• Leak detection pump (below air cleaner housing)
• Nca
• O2s heater relay down- stream (cali- fornia)
• O2s heater relay up- stream (cali- fornia)
• Overdrive switch
• Oxygen sensor 1/1 upstream (in exhaust downpipe) (federal) (in exhaust manifold front outlet) (california)
• Oxygen sensor 1/2 downstream (downstream of in line converter) (federal) (outlet of front mini converter) (california)
• Oxygen sensor 2/1 upstream (california) (in exhaust manifold rear outlet)
• Oxygen sensor 2/2 downstream (california) (outlet of rear mini converter)
• Pci bus
• Pnk
• Power distribution center (next to battery)
• Powertrain control module (on right side of firewall)
• S104
• S106
• S108
• S110
• S111
• S129
• S130 (near pdc)
• S203
• S316
• Sci receive
• Sci transmit
• Shift interlock system
• Spd ctrl pow
• Spd ctrl sw
• T99
• Tan/red
• Torque man req
• 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 Laredo 1999

List of elements for 4.7L, Engine Performance Wiring Diagrams (1 of 3) for Jeep Grand Cherokee Laredo 1999:

• (between inj 4 & 6)
• (left side engine harness)
• (right side of engine)
• (top of engine in fuel injector harness)
• +5v
• C24
• 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+
• G120
• 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
• K17
• K18
• K20
• K21
• K22
• K24
• K241
• K30
• K341
• K38
• K39
• K40
• K41
• K44
• K58
• K59
• K60
• 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 (next to battery)
• Powertrain control module (on right side of firewall)
• S109
• S118
• S121
• S124
• Sens ground
• T24
• Tan
• Tan/pnk
• Tan/red
• Tp sens
• Trans ctl rly
• Transmission control system
• Transmission, anti-lock brake and instrument cluster systems (speed signal)
• Vss signal
• Z11
• Z12

4.7L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Laredo 1999

List of elements for 4.7L, Engine Performance Wiring Diagrams (2 of 3) for Jeep Grand Cherokee Laredo 1999:

• (in break- out to tp sensor) s120
• (in breakout to crankshaft position sensor) s119
• (left side engine harn)
• (on throttle body) idle air control motor
• (right rear fender area)
• (top of trans- mission)
• (under driver's seat) g300
• 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 start or run
• Intake air temperature sensor (in intake manifold plenum)
• Junction block (behind left side of dash)
• Manifold absolute position sensor (front of intake manifold)
• No 2 drv
• No 3 drv
• No 4 drv
• No1 drv
• Power distribution center (next to battery)
• S105
• S107 (top of engine in fuel injector harness)
• S116
• S122
• S128
• S307
• S315 (front body harn, left dash)
• Starting system
• Throttle position sensor (on throttle body)
• Transmission control system
• Transmission solenoid assembly (on transmission valve body)

4.7L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Laredo 1999

List of elements for 4.7L, Engine Performance Wiring Diagrams (3 of 3) for Jeep Grand Cherokee Laredo 1999:

• (bottom of steering column) diagnostic junction port
• (in breakout to 2/2 oxygen sensor harness)
• (in breakout to oxygen sensors)
• (on left fender side shield)
• (right rear of engine compt)
• (right rear of engine) g117
• (top of engine, in fuel injector harness)
• 1/1 2/1 o2 rly
• 1/2 2/2 o2 rly
• A/c pres sig
• A/c system
• Asd relay ctrl
• Asd rly out
• Bat tem sens sig
• Battery temperature sensor (below battery tray)
• Brake sw sens
• C13
• C18
• Calif
• Charging system
• 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
• Ex. calif.
• F42
• Fuel lev sensor
• Fuel pmp rly
• Fuse 10a
• Fuse 20a
• Gen source
• Hot at all times
• Hot in start or run
• Instrument cluster
• Junction block (behind left side of dash)
• K106
• K107
• K151
• K21
• K22
• K226
• K24
• K25
• K251
• K29
• K31
• K51
• K52
• Leak det pmp
• Leak det pump
• Leak detection pump (below air cleaner housing)
• Nca
• O2s heater relay down- stream (cali- fornia)
• O2s heater relay up- stream (cali- fornia)
• Oxygen sensor 1/1 upstream (below right exhaust manifold) (federal) (below left exhaust manifold) (california)
• Oxygen sensor 1/2 downstream (downstream of in-line converter) (federal) (outlet of left mini converter) (california)
• Oxygen sensor 2/1 upstream (california) (below right exhaust manifold)
• Oxygen sensor 2/2 downstream (california) (outlet of right mini converter)
• Pci bus
• Pnk
• Power distribution center (next to battery)
• Powertrain control module (on right side of firewall)
• S106
• S108
• S111
• S112
• S125 (at breakout to pcm conn c3)
• S129
• S130 (near pdc)
• S131 (near pdc)
• S316
• Sci receive
• Sci transmit
• Sensor ground
• Shift interlock system
• Side of dash, near steering column)
• Spd ctrl pow
• Spd ctrl sw
• T10
• T99
• 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