Page 689 of 4284

Symptom:
HORIZONTAL SENSOR OUT OF RANGE HIGH
When Monitored and Set Condition:
HORIZONTAL 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 HORIZONTAL POSITION SIGNAL CIRCUIT
HORIZONTAL SENSOR HIGH
CHECK HORIZONTAL SENSOR SHORT TO MOTOR
MEMORY SEAT MIRROR MODULE HORIZONTAL SENSOR HIGH
STORED DIAGNOSTIC TROUBLE CODE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, 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
Ye s®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 Horizontal Position Sensor connector.
Measure the resistance of the Seat Position Sensor Ground circuit at the driver
power seat Horizontal connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 3
No®Go To 8
660
MEMORY SEAT
Page 690 of 4284

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
Ye s®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
Ye s®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 DRBIIItin Body Memory Seat Sensors
Read the Horizontal Position Sensor voltage.
Is the voltage above 0.2 volts?All
Ye s®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 DRBIIItin 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
Ye s®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.
661
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE HIGH ÐContinued
Page 691 of 4284
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
Ye s®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.
662
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE HIGH ÐContinued
Page 692 of 4284

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 DRBIIIt, 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
Ye s®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
Ye s®Go To 3
No®Go To 7
663
MEMORY SEAT
Page 693 of 4284

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
Ye s®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
Ye s®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 DRBIIItselect Body Memory Seat Sensors.
Read the Horizontal Position Sensor voltage.
Is the voltage above 4.5 volts?All
Ye s®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
Ye s®Repair the Seat 5 Volt Supply circuit for a short to ground.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Go To 8
664
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE LOW ÐContinued
Page 694 of 4284
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 Sensor 5 Volt Supply wire between the Horizontal
Sensor connector and the C2 connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 9
No®Repair the Seat Sensor 5 Volt Supply circuit for an open.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
9 If there are no possible cause remaining, view repair. All
Repair
Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
665
MEMORY SEAT
HORIZONTAL SENSOR OUT OF RANGE LOW ÐContinued
Page 695 of 4284

Symptom:
LEFT MIRROR HORIZONTAL SENSOR OUT OF RANGE HIGH
When Monitored and Set Condition:
LEFT MIRROR HORIZONTAL SENSOR OUT OF RANGE HIGH
When Monitored: Continuously when the PCI bus is active
Set Condition: This code is set when the mirror sensor feedback to the Memory Seat
Mirror Module is greater than the mirror out of range high value stored in EEPROM. Code
will remain for 50 ignition cycles.
POSSIBLE CAUSES
LEFT MIRROR HORIZONTAL POSITION WIRE SHORTED TO VOLTAGE
LEFT MIRROR SENSOR GROUND WIRE OPEN
STORED DIAGNOSTIC TROUBLE CODE
LEFT MIRROR HORIZONTAL POSITION SIGNAL OPEN
LEFT POWER MIRROR
MEMORY SEAT MIRROR MODULE HORIZONTAL POSITION SIGNAL
MEMORY SEAT MIRROR MODULE SENSOR GROUND
TEST ACTION APPLICABILITY
1 With the DRBIIIt, 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
Ye s®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 the ignition off.
Disconnect the Left Power Mirror connector.
Turn the ignition on.
Measure the voltage of the Left Mirror Horizontal Position Signal circuit in the Left
Power Mirror harness connector.
Is the voltage between 4.5 and 5.5 volts?All
Ye s®Go To 3
No®Go To 6
666
MEMORY SEAT
Page 696 of 4284

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Left Power Mirror connector.
Measure the resistance of the Left Mirror Sensor Ground circuit in the harness
connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Go To 5
4 If there are no possible causes remaining, view repair. All
Repair
Replace the Left Power Mirror.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the Left Power Mirror connector.
Disconnect the Memory Seat Mirror Module C1 connector.
Measure the resistance of Left Mirror Sensor Ground circuit between the Memory
Seat Mirror Module connector and the Left Power Mirror connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Repair the open Sensor Ground circuit.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the Left Power Mirror connector.
Disconnect the Memory Seat Mirror Module C1 connector.
Turn the ignition on.
Measure the voltage of Left Mirror Horizontal Position Signal circuit.
Is there any voltage present?All
Ye s®Repair the Left Mirror Horizontal Position Signal circuit for a
short to voltage.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Go To 7
7 Turn the ignition off.
Disconnect the Memory Seat Mirror Module C1 connector.
Disconnect the Left Power Mirror connector.
Measure the resistance of the Left Mirror Horizontal Position Signal circuit from the
Left Power Mirror connector to the Memory Seat Mirror Module connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Repair the open Left Mirror Horizontal Position Signal wire.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
667
MEMORY SEAT
LEFT MIRROR HORIZONTAL SENSOR OUT OF RANGE HIGH ÐContinued