LaCrosse 2006-2007

Starter

Print

Removal & Installation



3.6L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the battery ground (negative) cable from the battery.
  4.  
  5. Raise and support the vehicle.
  6.  
  7. Remove the radiator air baffle.
  8.  
  9. Remove the starter motor BAT terminal nut and electrical leads.
  10.  
  11. Remove the starter motor bolts.
  12.  
  13. Remove the starter motor.

    Click image to see an enlarged view

    Fig. Starter installation-3.6L engine

  14.  

To install:

  1. Install the starter motor.
  2.  
  3. Install the starter motor bolts. Tighten the starter motor bolts to 37 ft. lbs. (50 Nm).
  4.  
  5. Install the starter motor S terminal electrical connector.
  6.  
  7. Install the battery positive cable and the BAT terminal nut to the starter motor BAT terminal. Tighten the starter motor BAT terminal nut to 115 inch lbs. (13 Nm).
  8.  
  9. Install the radiator air baffle.
  10.  
  11. Lower the vehicle.
  12.  
  13. Install the battery ground (negative) cable to the battery.
  14.  

3.8L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Flexplate inspection cover
     
    Splash shield, if equipped
     
    Electrical connectors
     
    Transaxle cooler line clip from the transaxle, if necessary
     
    Starter motor wiring
     
    Starter motor bolts
     
    Starter

    Click image to see an enlarged view

    Fig. Starter in place with wiring-3.8L engine

     

  4.  

To install:

  1. Install or connect the following:

    Starter and torque the bolts to 32 ft. lbs. (43 Nm)
     
    Wiring and torque the -B- terminal nut to 89 inch lbs. (10 Nm) and the -S- terminal nut to 22 inch lbs. (3 Nm).
     
    Flexplate inspection cover and torque the bolts to 62 inch lbs. (7 Nm)
     
    Splash shield
     
    Negative battery cable
     

  2.  

Testing & Troubleshooting



The starting system includes the battery, starter motor, solenoid switch, ignition switch, inhibitor switch, connection wires and the battery cables. When the ignition key is turned to the start position, current flows and energizes the starter motor solenoid coil. The solenoid plunger and clutch shift lever are activated, and the clutch pinion engages the ring gear. The contacts close and the starter motor cranks the engine. In order to prevent damage caused by excessive rotation of the starter armature when the engine starts, the clutch pinion gear overruns.

  1. Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause a fault symptom.
  2.  
  3. The starter should crank the engine smoothly and steadily. If the starter engages, but cranks the engine erratically, remove it, and inspect the starter drive gear and torque converter ring gear for damage. Check the drive gear overrunning clutch for binding or slipping when the armature is rotated with the drive gear held in place. If damaged, replace the starter drive.
  4.  
  5. If the starter is not turning over the engine, check that the wire connections are fastened securely to the starter solenoid and that battery voltage (12 volts) is supplied to the starter.
  6.  

The Engine Control Module (ECM)/Powertrain Control Module (PCM) controls engine cranking based on a power mode input and the status of the clutch start switch (manual transaxle) or the Park/Neutral Position (PNP) switch (automatic transaxle). With the transaxle in Park/Neutral or the clutch depressed, voltage at the ECM/PCM PNP/clutch start switch signal circuit is high. This indicates to the ECM/PCM that conditions are acceptable for cranking. When a power mode crank request is seen, the ECM/PCM grounds the starter relay coil control circuit. This energizes the coil side of the relay, which pulls the switch side of the relay closed, applying voltage to the starter S-terminal and engaging the starter solenoid.

  1. A misadjusted PNP switch or clutch start switch may result in a starter solenoid that will not engage or click.
  2.  

 
label.common.footer.alt.autozoneLogo