Lucerne V6-3.9L (2009)
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)
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Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
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Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for Scan Tool Information
Circuit/System Verification
Ignition ON, observe the following scan tool parameters in the Driver Door Switch and Passenger Door Switch input data lists while pressing and
releasing the related switch. The readings should change between Active and Inactive.
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Seat Back Heat Mode Sw.
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Seat Heat Mode Sw.
Circuit/System Testing
Driver Heated Seat Inoperative
1. Ignition OFF, disconnect the harness connector at the driver heated seat switch.
2. Ignition OFF, test for less than 10 ohms of resistance between the heated seat switch low reference circuit terminal 3 and ground.
‹› If greater than 10 ohms, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the door module.
3. Ignition ON, verify the scan tool Seat Heat Mode Sw. parameter is Inactive.
‹› If not Inactive, test the signal circuit terminal 8 for a short to ground. If the circuit tests normal, replace the door control module.
4. Install a 3A fused jumper wire between the signal circuit terminal 8 and ground. Verify the scan tool Seat Heat Mode Sw parameter is Active.
‹› If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door control module.
5. Ignition ON, verify the scan tool Seat Back Heat Mode Sw. parameter is Inactive.
‹› If not Inactive, test the signal circuit terminal 11 for a short to ground. If the circuit tests normal, replace the door control module.
6. Install a 3A fused jumper wire between the signal circuit terminal 11 and ground. Verify the scan tool Seat Back Heat Mode Sw parameter is
Active.
‹› If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door control module.
7. If all circuits test normal, test or replace the heated seat switch.
Passenger Heated Seat Inoperative
1. Ignition OFF, disconnect the harness connector at the passenger heated seat switch.
2. Ignition OFF, test for less than 10 ohms of resistance between the heated seat switch low reference circuit terminal 5 and ground.
‹› If greater than 10 ohms, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the door module.
3. Ignition ON, verify the scan tool Seat Heat Mode Sw. parameter is Inactive.
‹› If not Inactive, test the signal circuit terminal 14 for a short to ground. If the circuit tests normal, replace the door control module.
4. Install a 3A fused jumper wire between the signal circuit terminal 14 and ground. Verify the scan tool Seat Heat Mode Sw parameter is Active.
‹› If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the door control module.
5. Ignition ON, verify the scan tool Seat Back Heat Mode Sw. parameter is Inactive.
‹› If not Inactive, test the signal circuit terminal 11 for a short to ground. If the circuit tests normal, replace the door control module.
6. Install a 3A fused jumper wire between the signal circuit terminal 11 and ground. Verify the scan tool Seat Back Heat Mode Sw parameter is
Active.
