Page 701 of 4284

Symptom:
LEFT MIRROR VERTICAL SENSOR OUT OF RANGE LOW
When Monitored and Set Condition:
LEFT MIRROR VERTICAL SENSOR OUT OF RANGE LOW
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 less than the mirror out of range low value stored in EEPROM. Code will
remain for 50 ignition cycles
POSSIBLE CAUSES
MSMM VERTICAL POSITION LOW
STORED DIAGNOSTIC TROUBLE CODE
LEFT MIRROR VERTICAL POSITION SIGNAL WIRE SHORT TO GROUND
LEFT POWER MIRROR
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 Vertical Position Signal circuit in the Left
Power Mirror harness connector.
Is the voltage between 4.5 and 5.5 volts?All
Ye s®Replace the Left Power Mirror.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Go To 3
672
MEMORY SEAT
Page 702 of 4284
TEST ACTION APPLICABILITY
3 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 Vertical Position Signal circuit to ground
at the Left Power Mirror harness side connector.
Is the resistance below 1000.0 ohms?All
Ye s®Repair the Left Mirror Vertical Position Signal wire for a short to
ground.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Replace the Memory Seat Mirror Module.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
673
MEMORY SEAT
LEFT MIRROR VERTICAL SENSOR OUT OF RANGE LOW ÐContinued
Page 709 of 4284

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 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 Disconnect the Power Seat Switch connector.
Measure the voltage of the Seat Rear Down Switch Sense circuit.
Is there any voltage present?All
Ye s®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
Ye s®Repair the Seat Rear Down Switch Sense wire for a short to
voltage.
Perform MEMORY SYSTEM VERIFICATION TEST - VER 1.
No®Go To 4
680
MEMORY SEAT
Page 710 of 4284
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.
681
MEMORY SEAT
REAR RISER DOWN POSITION STUCK ÐContinued
Page 711 of 4284

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 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 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
Ye s®Go To 3
No®Go To 8
682
MEMORY SEAT
Page 712 of 4284

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
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 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
Ye s®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 DRBIIItin Body Memory Seat Sensors
Read the Rear Riser 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 rear riser motor is
operational.
With the DRBIIItin 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
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.
683
MEMORY SEAT
REAR RISER SENSOR OUT OF RANGE HIGH ÐContinued
Page 713 of 4284
TEST ACTION APPLICABILITY
8 Turn ignition off.
Disconnect the Memory Seat Mirror Module C2 connector.
Disconnect the Driver Power Seat Rear Riser Position Sensor connector.
Measure the resistance of the Seat Position Sensor Ground wire between the Rear
Riser 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.
684
MEMORY SEAT
REAR RISER SENSOR OUT OF RANGE HIGH ÐContinued
Page 714 of 4284

Symptom:
REAR RISER SENSOR OUT OF RANGE LOW
When Monitored and Set Condition:
REAR RISER 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
MEMORY SEAT MIRROR MODULE 5 VOLT SUPPLY
SEAT 5 VOLT SUPPLY WIRE SHORT TO GROUND
SEAT SENSOR 5 VOLT SUPPLY WIRE OPEN
REAR RISER POSITION SIGNAL CIRCUIT OPEN
REAR RISER POSITION SIGNAL CIRCUIT SHORT TO GROUND
REAR RISER SENSOR LOW
MEMORY SEAT MIRROR MODULE REAR RISER 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 Rear Riser Sensor connector.
Turn ignition on.
Measure the voltage of the Seat Sensor 5 Volt Supply circuit at rear riser connector.
Is the voltage above 4.5 volts?All
Ye s®Go To 3
No®Go To 7
685
MEMORY SEAT