Chrysler Town, Dodge Caravan. Manual — part 863
TEST
ACTION
APPLICABILITY
3
Disconnect the Driver Power Seat Horizontal 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 Horizontal Position Sensor Connector.
Disconnect the Memory Seat Mirror Module C1 Connector.
Turn ignition on.
Measure the voltage between Horizontal Position Signal circuit and ground.
Is the voltage above 0.2 volts?
All
Yes
→ Repair the Horizontal 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 Horizontal 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 Horizontal 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 Horizontal motor is
operational.
With the DRBIII
t in Body Memory Seat Sensors monitor the Horizontal Position
sensor while operating the seat Horizontal motor 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.
688
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE HIGH —
Continued
TEST
ACTION
APPLICABILITY
8
Turn ignition off.
Disconnect the Memory Seat Mirror Module C2 connector.
Disconnect the Driver Power Seat Horizontal Position Sensor connector.
Measure the resistance of the Seat Position Sensor Ground wire between the
Horizontal Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No
→ Repair the open Seat Sensor Ground wire.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
689
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE HIGH —
Continued
Symptom:
HORIZONTAL SENSOR OUT OF RANGE LOW
When Monitored and Set Condition:
HORIZONTAL SENSOR OUT OF RANGE LOW
When Monitored:
Continuously when the PCI bus is active.
Set Condition:
This condition is immediately set when the seat motor potentiometer
feeds a value lower than the Memory Seat Mirror Module has stored in EEPROM. Code
will remain for 50 ignition cycles.
POSSIBLE CAUSES
SEAT 5 VOLT SUPPLY WIRE SHORT TO GROUND
SEAT SENSOR 5 VOLT SUPPLY WIRE OPEN
HORIZONTAL POSITION SIGNAL CIRCUIT OPEN
HORIZONTAL POSITION SIGNAL CIRCUIT SHORT TO GROUND
MEMORY SEAT MIRROR MODULE 5 VOLT SUPPLY
HORIZONTAL SENSOR LOW
MEMORY SEAT MIRROR MODULE HORIZONTAL LOW
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
Ensure the Memory Seat Mirror Module is fully connected before proceeding.
Disconnect the Driver Power Seat Horizontal Position Sensor connector.
Turn ignition on.
Measure the voltage of the Seat Sensor 5 Volt Supply circuit at Horizontal sensor
connector.
Is the voltage above 4.5 volts?
All
Yes
→ Go To 3
No
→ Go To 7
690
MEMORY SEAT
TEST
ACTION
APPLICABILITY
3
Turn ignition off.
Disconnect the Driver Power Seat Horizontal Position Sensor Connector.
Disconnect the Memory Seat Mirror Module C1 Connector.
Measure the resistance of the Horizontal Position Signal circuit between the
Horizontal sensor and the Memory Seat Mirror Module connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Horizontal Position Signal circuit for an open.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
4
Turn ignition off.
Disconnect the Memory Seat Mirror Module C1 connector.
Disconnect the Driver Power Seat Horizontal Position Sensor connector.
Measure the resistance of the Horizontal Position Signal circuit to ground.
Is the resistance below 1000 ohms?
All
Yes
→ Repair the Horizontal Position Signal circuit a short to ground.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn ignition off.
Ensure the Memory Seat Mirror Module is fully connected before proceeding.
Disconnect the Driver Power Seat Horizontal Position Sensor Connector.
Connect a jumper wire between Seat Sensor 5 volt Supply and Horizontal Position
Signal circuits.
Turn ignition on.
With the DRBIII
t select Body Memory Seat Sensors.
Read the Horizontal Position Sensor voltage.
Is the voltage above 4.5 volts?
All
Yes
→ Replace the Seat Track Assembly.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No
→ Go To 6
6
If there are no possible causes remaining, view repair.
All
Repair
Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
7
Turn ignition off.
Disconnect the Memory Seat Mirror Module C2 connector.
Measure the resistance of the Seat Sensor 5 volt supply circuit to body ground.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Seat 5 Volt Supply circuit for a short to ground.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No
→ Go To 8
691
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE LOW —
Continued
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