STARTING/CHARGING – Buick LaCrosse CX 2009 – SYSTEM WIRING DIAGRAMS

STARTING/CHARGING

Charging Wiring Diagram for Buick LaCrosse CX 2009

List of elements for Charging Wiring Diagram for Buick LaCrosse CX 2009:

• (in i/p wiring harness, 21 cm from lamp assembly switch)
• (not used) a
• 10 volt ref
• 3.8l
• 5.3l
• Batt +
• Battery
• Battery current sensor (near battery)
• Body control module (bcm) (left side of dash)
• Charge indicator
• Clstr fuse 10a
• Computer data lines system
• Current sensor low ref
• Current sensor sig
• Driver information center (dic) display
• Ecm class 2 serial data
• Engine control module (ecm) (left front of engine compt)
• G102 (3.8l: near battery)
• G111 (3.8l: lower left rear of engine)
• G202 (left side of dash)
• Generator
• Generator field duty cycle sig
• Generator turn on sig
• Gnd
• Ground
• Hot at all times
• I/p class 2 serial data
• I/p fuse block (right side of dash)
• Instrument panel cluster (ipc)
• Interior lights system
• J204
• J211
• Jx205 (clipped to knee bolster panel, right of data link connector)
• Logic
• Pcm class 2 serial data
• Power distribution system
• Powertrain control module (pcm)
• Red
• Remote st sensor sig
• Starter motor

3.8L VIN 2

3.8L VIN 2, Starting Wiring Diagram for Buick LaCrosse CX 2009

List of elements for 3.8L VIN 2, Starting Wiring Diagram for Buick LaCrosse CX 2009:

• (not used)
• 12-volt ref
• Acc
• Automatic transmission
• Automatic transmission internal mode
• Battery
• Battery positive
• Body control module (bcm) (left side of dash)
• C11
• C12
• Charging circuit
• Class 2 serial data
• Clstr fuse 10a
• Crank relay
• Crank voltage
• Driver information center (dic) display
• G101 (left front of engine compt)
• G102 (near battery)
• G111 (lower left rear of engine)
• G113 (lower left rear of engine, near starter)
• Ground distribution system
• Hood ajar switch (front of engine compt)
• Hood ajar switch sig
• Hot at all times
• Hot w/ ign 1 relay energized
• I/p fuse block (right side of dash)
• Ignition 1 voltage
• Ignition switch
• Instrument panel cluster (ipc)
• J101
• J112
• J200
• Jx205 (clipped to knee bolster panel, right of data link connector)
• Lock
• Logic
• Pcm fuse 15 10a
• Pnk
• Power distribution system
• Powertrain control module (pcm)
• Red
• Run
• Start
• Start enable rly ctrl
• Starter fuse 33 40a
• Starter motor
• Switch (ims)
• Underhood fuse block (right front strut tower)
• W/ remote keyless entry

5.3L VIN C

5.3L VIN C, Starting Wiring Diagram for Buick LaCrosse CX 2009

List of elements for 5.3L VIN C, Starting Wiring Diagram for Buick LaCrosse CX 2009:

• 12-volt ref
• Acc
• Automatic transmission
• Automatic transmission internal mode
• Battery
• Battery positive
• Body control module (bcm) (left side of dash)
• Charging circuit
• Class 2 serial data
• Clstr fuse 10a
• Crank voltage
• Driver information center (dic) display
• Ecm ign fuse 10a
• Engine control module (ecm) (left front of engine compt)
• G101 (left front of engine compt)
• G102
• G111
• G115 (left side of engine)
• Ground distribution system
• Hood ajar switch (front of engine compt)
• Hood ajar switch sig
• Hot at all times
• Hot w/ ign main pcb relay energized
• I/p fuse block (right side of dash)
• Ignition 1 voltage
• Ignition switch
• Instrument panel cluster (ipc)
• J112
• J125
• J200
• Jx205 (clipped to knee bolster panel, right of data link connector)
• Lock
• Logic
• Park/neutral sig
• Pnk
• Red
• Run
• Start
• Start enable rly ctrl
• Starter motor
• Strtr fuse 40a
• Strtr relay
• Switch (ims)
• Underhood fuse block (right front strut tower)
• W/ remote keyless entry
• X100