Chrysler Pacifica. Manual — part 243

TEST

ACTION

APPLICABILITY

3

Disconnect the Driver Rear Riser Seat Position Sensor connector.
Measure the voltage between Driver Seat Sensor 5 volt supply circuit and ground.
Turn ignition on.
Is the voltage above 5.5 volts?

All

Yes

→ Repair the Driver Seat Sensor 5 Volt Supply circuit for a short to

battery.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.

No

→ Go To 4

4

Turn ignition off.
Disconnect the Driver Rear Riser Seat Position Sensor Connector.
Disconnect the MHSAPM C2 Connector.
Turn ignition on.
Measure the voltage between Driver Seat Rear Riser Seat Position Signal circuit and
ground.
Is the voltage above 0.2 volts?

All

Yes

→ Repair the Driver Seat Rear Riser Position Signal circuit for a

short to voltage.
Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.

No

→ Go To 5

5

Turn ignition off.
Disconnect the Driver Rear Riser Seat Position Sensor Connector.
Ensure the MHSAPM is fully connected before proceeding.
Turn ignition on.
With the DRBIII

t in Body MHSAPM Sensors

Read the Driver Seat Rear Riser Sensor voltage.
Is the voltage above 0.2 volts?

All

Yes

→ Go To 6

No

→ Replace the Seat Track Assembly.

Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.

6

Ensure all seat and sensor connectors are connected and rear riser motor is
operational.
With the DRBIII

t in MHSAPM Sensors monitor the Driver Seat Rear Riser sensor

while operating the seat rear riser to both limits.
Did the voltage ever go above 7.0 volts only when the motor was in operation?

All

Yes

→ Replace the Seat Track Assembly.

Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.

No

→ Go To 7

7

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.

969

POWER SEATS

DRIVER REAR RISER SENSOR OUT OF RANGE HIGH - MHSAPM —

Continued

TEST

ACTION

APPLICABILITY

8

Turn ignition off.
Disconnect the MHSAPM C2 connector.
Disconnect the Driver Rear Riser Seat Position Sensor connector.
Measure the resistance of the Driver Seat Position Sensor Ground wire between the
Driver Rear Riser Seat Position Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the Memory/Heated Seat Adjustable Pedal Module.

Perform POWER SEAT SYSTEM VERIFICATION TEST - VER
1.

No

→ Repair the Driver Seat Position Sensor Ground wire for an open.

Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.

970

POWER SEATS

DRIVER REAR RISER SENSOR OUT OF RANGE HIGH - MHSAPM —

Continued

Symptom:

DRIVER REAR RISER SENSOR OUT OF RANGE LOW - MHSAPM

When Monitored and Set Condition:

DRIVER REAR RISER 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

MEMORY/HEATED SEAT ADJUSTABLE PEDAL MODULE 5 VOLT SUPPLY

DRIVER SEAT REAR RISER POSITION SIGNAL CIRCUIT OPEN

DRIVER SEAT REAR RISER POSITION SIGNAL CIRCUIT SHORT TO GROUND

DRIVER REAR RISER SEAT POSITION SENSOR LOW

MEMORY/HEATED SEAT ADJUSTABLE PEDAL MODULE REAR RISER LOW

STORED DIAGNOSTIC TROUBLE CODE

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, erase the DTC from the 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

t 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 Rear Riser Seat Position Sensor connector.
Turn ignition on.
Measure the voltage of the Driver Seat Sensor 5 Volt Supply circuit at rear riser
connector.
Is the voltage above 4.5 volts?

All

Yes

→ Go To 3

No

→ Go To 7

971

POWER SEATS

TEST

ACTION

APPLICABILITY

3

Turn ignition off.
Disconnect the Driver Rear Riser Seat Position Sensor Connector.
Disconnect the MHSAPM C2 Connector.
Measure the resistance of the Driver Seat Rear Riser Position Signal circuit between
the rear riser sensor and the MHSAPM C2 connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 4

No

→ Repair the Driver Seat Rear Riser 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 Rear Riser Seat Position Sensor connector.
Measure the resistance of the Driver Seat Rear Riser Position Signal circuit to
ground.
Is the resistance below 1000 ohms?

All

Yes

→ Repair the Driver Seat Rear Riser Position Signal circuit a 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 Rear Riser Seat Position Sensor Connector.
Connect a jumper wire between Driver Seat Sensor 5 volt Supply and Driver Seat
Rear Riser Position Signal circuits.
Turn ignition on.
With the DRBIII

t select MHSAPM Sensors.

Read the Driver Seat Rear Riser 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.
Disconnect the Driver Rear Riser Seat Position Sensor connector.
Measure the resistance of the Driver Seat Sensor 5 Volt Supply wire between the
Rear Riser Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 8

No

→ Repair the Driver Seat Sensor 5 Volt Supply circuit for an open.

Perform POWER SEAT SYSTEM VERIFICATION TEST - VER 1.

972

POWER SEATS

DRIVER REAR RISER SENSOR OUT OF RANGE LOW - MHSAPM —

Continued