Chrysler Voyager. Manual — part 320

Symptom:

REAR RISER DOWN POSITION STUCK

When Monitored and Set Condition:

REAR RISER DOWN POSITION STUCK

When Monitored:

Continuously when the PCI bus is active.

Set Condition:

If the seat switch is active for 30 seconds, this code will set and the

Memory Seat Mirror Module will ignore the input until the state has changed. Three
seconds after the stuck condition is removed, the seat will resume to normal operation.
Code will remain for 50 ignition cycles.

POSSIBLE CAUSES

STORED DIAGNOSTIC TROUBLE CODE

DRIVER POWER SEAT SWITCH

SEAT REAR DOWN SWITCH SENSE WIRE SHORT TO VOLTAGE

MEMORY SEAT MIRROR MODULE

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, erase the DTC from Memory Seat Mirror Module.

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 DRB check for the same DTC to reset in the MSMM.
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 MEMORY SYSTEM VERIFICATION TEST - VER 1.

2

Disconnect the Power Seat Switch connector.
Measure the voltage of the Seat Rear Down Switch Sense circuit.
Is there any voltage present?

All

Yes

→ Go To 3

No

→ Replace the Power Seat Switch.

Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

3

Disconnect the Power Seat Switch connector.
Disconnect the Memory Seat Mirror Module C1 connector.
Turn the ignition on.
Measure the voltage of the Seat Rear Down Switch Sense circuit to ground..
Is there any voltage present?

All

Yes

→ Repair the Seat Rear Down Switch Sense wire for a short to

voltage.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

No

→ Go To 4

707

MEMORY SEAT

TEST

ACTION

APPLICABILITY

4

If there are no possible causes remaining, view repair.

All

Repair

Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

708

MEMORY SEAT

REAR RISER DOWN POSITION STUCK —

Continued

Symptom:

REAR RISER SENSOR OUT OF RANGE HIGH

When Monitored and Set Condition:

REAR RISER SENSOR OUT OF RANGE HIGH

When Monitored:

Continuously when the PCI bus is active.

Set Condition:

This condition is immediately set when the seat motor potentiometer

feeds a value higher than the Memory Seat Mirror Module has stored in EEPROM. Code
will remain for 50 ignition cycles.

POSSIBLE CAUSES

MEMORY SEAT MIRROR MODULE SENSOR GROUND OPEN

SEAT SENSOR GROUND WIRE OPEN

5 VOLT SUPPLY SHORTED HIGH

CHECK VOLTAGE ON REAR RISER POSITION SIGNAL CIRCUIT

REAR RISER SENSOR HIGH

CHECK REAR RISER SHORT TO MOTOR

MEMORY SEAT MIRROR MODULE REAR RISER HIGH

STORED DIAGNOSTIC TROUBLE CODE

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, erase the DTC from Memory Seat Mirror Module.

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 DRB check for the same DTC to reset in the MSMM.
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 MEMORY SYSTEM VERIFICATION TEST - VER 1.

2

Turn ignition off.
Disconnect the Driver Power Seat Rear Riser Position Sensor connector.
Measure the resistance of the Seat Position Sensor Ground circuit at the driver
power seat rear riser connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

No

→ Go To 8

709

MEMORY SEAT

TEST

ACTION

APPLICABILITY

3

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

All

Yes

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

Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn ignition off.
Disconnect the Driver Power Seat Rear Riser Position Sensor Connector.
Disconnect the Memory Seat Mirror Module C1 Connector.
Turn ignition on.
Measure the voltage between Rear Riser Position Signal circuit and ground.
Is the voltage above 0.2 volts?

All

Yes

→ Repair the Rear Riser Position Signal circuit for a short to

voltage.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

No

→ Go To 5

5

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

t in Body Memory Seat Sensors

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

All

Yes

→ Go To 6

No

→ Replace the Seat Track Assembly.

Perform MEMORY 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 Body Memory Seat Sensors monitor the Rear Riser Position

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 MEMORY SYSTEM VERIFICATION TEST - VER 1.

No

→ Go To 7

7

If there are no possible causes remaining, view repair.

All

Repair

Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.

710

MEMORY SEAT

REAR RISER SENSOR OUT OF RANGE HIGH —

Continued