LaCrosse FWD L4-2.4L (2011)
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
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Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Connector
Repairs/Connector Repairs)
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Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
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Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Circuit/System Verification
1. Headlights ON, verify that the center console multifunction switch backlight is illuminated.
‹› If the backlight is not illuminated, refer to Interior Backlighting Malfunction (See: Lighting and Horns/Testing and Inspection/Interior
Backlighting Malfunction)
2. Ignition ON, transaxle in P (park), command the rear window sunshade to EXTEND and RETRACT by pressing the sunshade switch. The rear
window sunshade should EXTEND and RETRACT each time the sunshade switch is pressed
‹› If the rear window sunshade does not EXTEND or RETRACT, refer to Rear Window Sunshade Malfunction.
3. Engine running, verify the rear window sunshade is extended, observe the function of the rear window sunshade while shifting the transaxle in R
(reverse). The rear window sunshade should RETRACT when the transaxle is in R (reverse).
‹› If the rear window sunshade does not RETRACT, refer to Reverse Override Malfunction.
Circuit/System Testing
Rear Window Sunshade Malfunction
1. Ignition OFF, disconnect the harness connector at the K50 rear window sunshade module.
2. Test for less than 35 ohm between the ground circuit terminal 1 and ground.
‹› If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.
‹› If the test lamp does not illuminate and the ignition circuit fuse is open, test the ignition circuit for a short to ground. If the circuit tests normal,
replace the K50 rear window sunshade module.
‹› If the test lamp does not illuminate and the ignition circuit fuse is normal, test the ignition circuit for an open/high resistance. If the circuit tests
normal, refer to Ignition Main Relay Malfunction.
4. Connect a test lamp between the signal circuit terminal 8 and B+.
5. Command the rear window sunshade motor to EXTEND and RETRACT by pressing the sunshade switch, the test lamp should turn ON as the
switch is pressed and turn OFF when the switch is released.
‹› If the test lamp is always OFF, test the signal circuit for a short to B+ or an open/high resistance. If the circuit tests normal, test or replace the
S48E multi-function switch-center console.
‹› If the test lamp is always ON, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the S48E multi-function
switch-center console.
6. Ignition OFF, connect the harness connector at the K50 rear window sunshade module and disconnect the harness connector at the at the M44 rear
window sunshade motor.
7. Test for less than 35 ohm between the control circuit terminal listed below and ground:
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Control terminal 1
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Control terminal 2
‹› If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K50 rear window sunshade module.
8. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
9. Ignition ON, command the M44 rear window sunshade motor to EXTEND and RETRACT by pressing the sunshade switch. The test lamp should
turn ON when commanding the EXTEND and RETRACT states.
‹› If the test lamp is OFF during either command, test either control circuit for a short to ground. If the circuit tests normal, replace the K50 rear
