Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Comfort Seat Wheel Module (CSWM) DTCs and record on the repair order.
2. With the scan tool, erase CSWM DTCs.
3. Turn the ignition off for ten seconds.
4. Turn the ignition on.
5. Operate the Driver Seat Switch in each position/direction.
6. Allow 30 seconds for the DTC maturation time to accumulate.
7. With the scan tool, read CSWM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (P239) DRIVER SEAT SWITCH REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the CSWM 12 pin connector.
3. Disconnect the Driver Seat Switch.
4. Measure the resistance of the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit between the CSWM 12 pin connector and the Driver Seat Switch connector.
  Is the resistance above 2.0 Ohms?
  
  Yes
  - Repair the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (P239) DRIVER SEAT SWITCH REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR A SHORT TO GROUND
1. Check the continuity between ground and the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit.
  Is there continuity between ground and the (P239) Driver Seat Position Lift/Horizontal Switch Mux circuit?
  
  Yes
  - Repair the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (P239) DRIVER SEAT SWITCH REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage of the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit.
  Is there any voltage present?
  
  Yes
  - Repair the (P239) Driver Seat Switch Rear Vertical/Horizontal Switch Mux circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK DTCS WITH A KNOWN GOOD SWITCH INSTALLED
1. Turn the ignition off.
2. Connect the CSWM 12 pin connector.
3. Connect a known good Driver Seat Switch.
4. Turn the ignition on.
5. With the scan tool, erase CSWM DTCs.
6. Turn the ignition off for ten seconds.
7. Turn the ignition on.
8. Operate the Driver Seat Switch in each position/direction.
9. Allow 30 seconds for the DTC maturation time to accumulate.
10. With the scan tool, read CSWM DTCs.
  Did the DTC return?
  
  Yes
  - Install the original Driver Seat Switch.
  - Go To 6
  No
  - Replace the Driver Seat Switch. Refer to SWITCH, SEAT, POWER, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED WIRING AND HARNESS CONNECTIONS
1. Turn the ignition off.
2. Check the related component and module power supply and ground circuits.
3. Disconnect the CSWM harness connector(s).
4. Disconnect all related in-line harness connections (if equipped).
5. Disconnect the related component harness connectors.
6. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
7. Reconnect all harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
10. With the scan tool, erase DTCs.
11. Using the recorded information along with the When Monitored and Set Conditions, operate the vehicle within the conditions that set the DTC.
12. With the scan tool, read CSWM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the CSWM in accordance with the Service Information. Refer to MODULE, COMFORT SEAT AND WHEEL (CSWM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.