Diagnostic Test

WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Memory Seat Module-Passenger (MSMP) DTCs and record on the repair order.
2. With the scan tool, erase MSMP DTCs.
3. Turn the ignition off.
4. Turn the ignition on.
5. Cycle the Power Seat Switch to all positions.
6. With the scan tool, read MSMP DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION. Refer to TESTING FOR AN INTERMITTENT CONDITION .

CHECK THE PASSENGER SEAT SWITCH

Passenger Seat Switch Continuity
Switch Position	Continuity Between	Resistance Value (± 5%)
Off	10-4	Open
Off	10-11	Open
Off	1-4	47 Ohms
Off	1-11	47 Ohms
Rear Tilt Up	10-11	169 Ohms
Rear Tilt Down	10-11	76 Ohms
Horizontal Forward	10-11	43 Ohms
Horizontal Rearward	10-11	10 Ohms
Recliner Up	10-4	43 Ohms
Recliner Down	10-4	10 Ohms
Front Tilt Up	10-4	169 Ohms
Front Tilt Down	10-4	76 Ohms

Turn the ignition off.
Disconnect the Passenger Seat Switch harness connector.
Using the Passenger Seat Switch Continuity chart, measure the resistance of the Passenger Seat Switch in the Off position.
Is the resistance within proper specifications?

Yes
- Go To 3
No
- Replace the Passenger Seat Switch in accordance with the Service Information. Refer to SWITCH, SEAT, REMOVAL AND INSTALLATION .
- Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST .

CHECK THE (P224) PASSENGER SEAT SWITCH MUX RETURN CIRCUIT FOR AN OPEN
1. Disconnect the MSMP C4 harness connector.
2. Measure the resistance of the (P224) Passenger Seat Switch Mux Return circuit between the MSMP C4 harness connector and the Passenger Seat Switch harness connector.
  Is the resistance below 1.0 Ohm?
  
  Yes
  - Go To 4
  No
  - Repair the (P224) Passenger Seat Switch Mux Return circuit for an open or high resistance.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST .
CHECK THE (P346) PASSENGER SEAT SWITCH FRONT VERTICAL/RECLINER SWITCH MUX CIRCUIT FOR AN OPEN
1. Measure the resistance of the (P346) Passenger Seat Switch Front Vertical/Recliner Switch Mux circuit between the MSMP C4 harness connector and the Passenger Seat Switch harness connector.
  Is the resistance below 1.0 Ohm?
  
  Yes
  - Go To 5
  No
  - Repair the (P346) Passenger Seat Switch Front Vertical/Recliner Switch Mux circuit for an open or high resistance.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST .
CHECK THE (P348) PASSENGER SEAT SWITCH REAR VERTICAL/HORIZONTAL SWITCH MUX CIRCUIT FOR AN OPEN
1. Measure the resistance of the (P348) Passenger Seat Switch Rear Vertical/Horizontal Switch Mux circuit between the MSMP C4 harness connector and the Passenger Seat Switch harness connector.
  Is the resistance below 1.0 Ohm?
  
  Yes
  - Replace and program the Memory Seat Module-Passenger (MSMP) in accordance with the Service Information. Refer to MODULE, MEMORY SEAT (MSM), REMOVAL AND INSTALLATION .
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST .
  No
  - Repair the (P348) Passenger Seat Switch Rear Vertical/Horizontal Switch Mux circuit for an open or high resistance.
  - Perform the POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST .