Chrysler Pacifica. Manual — part 241
Symptom:
DRIVER HORIZONTAL SENSOR OUT OF RANGE LOW - MHSAPM
When Monitored and Set Condition:
DRIVER HORIZONTAL SENSOR OUT OF RANGE LOW - MHSAPM
When Monitored:
Continuously.
Set Condition:
This code is immediately set when the seat motor potentiometer feeds a
value lower than the Memory/Heated Seat Adjustable Pedal Module has stored in
EEPROM. Code will remain for 50 ignition cycles.
POSSIBLE CAUSES
DRIVER SEAT SENSOR 5 VOLT SUPPLY WIRE OPEN
DRIVER SEAT SENSOR 5 VOLT SUPPLY WIRE SHORT TO GROUND
DRIVER SEAT HORIZONTAL POSITION SIGNAL CIRCUIT OPEN
DRIVER SEAT HORIZONTAL POSITION SIGNAL CIRCUIT SHORT TO GROUND
MEMORY/HEATED SEAT ADJUSTABLE PEDALS MODULE 5 VOLT SUPPLY
DRIVER HORIZONTAL SENSOR LOW
MEMORY/HEATED SEAT ADJUSTABLE PEDALS MODULE HORIZONTAL LOW
STORED DIAGNOSTIC TROUBLE CODE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, erase the DTC from Memory/Heated Seat Adjustable Pedal
Module (MHSAPM).
Operate the driver’s power seat and memory system.
Turn the ignition switch to the Off position then start the engine and let run for one
minute.
With the DRBIII check for the same DTC to reset in the MHSAPM.
Did the same DTC reset?
All
Yes
→ Go To 2
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
2
Ensure the MHSAPM is fully connected before proceeding.
Disconnect the Driver Horizontal Seat Position Sensor connector.
Turn ignition on.
Measure the voltage of the Driver Seat Sensor 5 Volt Supply circuit at Driver
Horizontal Seat Position Sensor connector.
Is the voltage above 4.5 volts?
All
Yes
→ Go To 3
No
→ Go To 7
961
POWER SEATS
TEST
ACTION
APPLICABILITY
3
Turn ignition off.
Disconnect the Driver Horizontal Seat Position Sensor Connector.
Disconnect the MHSAPM C2 Connector.
Measure the resistance of the Driver Seat Horizontal Position Signal circuit between
the Horizontal sensor and the MHSAPM connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Driver Seat Horizontal Position Signal circuit for an
open.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
4
Turn ignition off.
Disconnect the MHSAPM C2 connector.
Disconnect the Driver Horizontal Seat Position Sensor connector.
Measure the resistance of the Driver Seat Horizontal Position Signal circuit to
ground.
Is the resistance below 1000 ohms?
All
Yes
→ Repair the Driver Seat Horizontal Position Signal circuit a for
short to ground.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.
No
→ Go To 5
5
Turn ignition off.
Ensure the MHSAPM is fully connected before proceeding.
Disconnect the Driver Horizontal Seat Position Sensor Connector.
Connect a jumper wire between Driver Seat Sensor 5 volt Supply and Driver Seat
Horizontal Position Signal circuits.
Turn ignition on.
With the DRBIII
t select MHSAPM Sensors.
Read the Driver Seat Horizontal Sensor voltage.
Is the voltage above 4.5 volts?
All
Yes
→ Replace the Seat Track Assembly.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.
No
→ Go To 6
6
If there are no possible causes remaining, view repair.
All
Repair
Replace the Memory/Heated Seat Adjustable Pedal Module.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
7
Turn ignition off.
Disconnect the MHSAPM C2 connector.
Measure the resistance of the Driver Seat Sensor 5 volt supply circuit to body ground.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Driver Seat Sensor 5 Volt Supply circuit for a short to
ground.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.
No
→ Go To 8
962
POWER SEATS
DRIVER HORIZONTAL SENSOR OUT OF RANGE LOW - MHSAPM —
Continued
TEST
ACTION
APPLICABILITY
8
Turn ignition off.
Disconnect the MHSAPM C2 connector.
Disconnect the Driver Horizontal Seat Position Sensor connector.
Measure the resistance of the Driver Seat Sensor 5 Volt Supply wire between the
Horizontal Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the Driver Seat Sensor 5 Volt Supply circuit for an open.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
9
If there are no possible cause remaining, view repair.
All
Repair
Replace the Memory/Heated Seat Adjustable Pedal Module.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
963
POWER SEATS
DRIVER HORIZONTAL SENSOR OUT OF RANGE LOW - MHSAPM —
Continued
Symptom:
DRIVER HORIZONTAL SWITCH STUCK - DDM
When Monitored and Set Condition:
DRIVER HORIZONTAL SWITCH STUCK - DDM
When Monitored:
Continuously.
Set Condition:
If the switch is held in the on position for over 30 seconds, this code will
set.
POSSIBLE CAUSES
DTC PRESENT
DRIVER POWER SEAT SWITCH
DRIVER SEAT HORIZONTAL/LUMBAR IN SWITCH MUX
DRIVER DOOR MODULE
TEST
ACTION
APPLICABILITY
1
Check the seat switches mechanical operation and also check for a possible obstruc-
tion. Correct if necessary.
Turn the ignition on.
With the DRBIII
t, erase DTCs.
Cycle the ignition switch from Off to Run.
Operate the Seat Switch in all positions several times.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display DRIVER HORIZONTAL SWITCH STUCK?
All
Yes
→ Go To 2
No
→ The condition that caused this code to set is not present at this
time. Operate the switch several times to ensure it does not stick.
If the switch ever sticks, replace it.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
2
Disconnect the Driver Power Seat Switch connector.
Turn the ignition on.
With the DRBIII
t, erase DTCs.
Cycle the ignition switch from Off to Run and wait 30 seconds.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display DRIVER HORIZONTAL SWITCH STUCK?
All
Yes
→ Go To 3
No
→ Replace the Driver Power Seat Switch.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.
964
POWER SEATS
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