Retrieving Diagnostic Trouble Codes

Turn ignition off. Move seat to a non-memorized position. Press and hold all 3 Driver's Position Memory Systems (DPMS) switch buttons simultaneously. Turn ignition on. Wait at least one second, then release all buttons. After one more second, position setting buttons will blink to indicate DTC.
If no DTCs are stored, position setting button LEDs will only blink one 3-second long blink. If DTCs are stored, first digit of DTC is indicated by one-second blinks. Second digit of DTC is indicated by short (.26 second) blinks. Each DTC is followed by a 3 second pause before any other DTCs are displayed.
Record all DTCs and see appropriate procedure to locate cause of problem. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table. Up to 4 DTCs will be stored at once.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC

Description

Possible Fault/Procedure

Seat Can Not Be Adjusted At All

Unable To Store Or Retrieve Driving Position Using Switch (Driver's Power Seat Control Unit)

Unable To Store Or Retrieve Driving Position Using Switch (Passenger's Multiplex Control Unit)

Seat Can Not Be Adjusted, Or Seat Can Be Adjusted Even When Vehicle Is Moving

⁽¹⁾ Transmission Range Switch

⁽²⁾ Countershaft Speed Sensor

⁽²⁾ Vehicle Speed Sensor Circuit

⁽¹⁾	See A/T GEAR POSITION SWITCH TEST under COMPONENT TESTS in INSTRUMENT PANELS - MDX article.

⁽²⁾	See VEHICLE SPEED SENSOR (VSS) CIRCUIT TEST under SYSTEM TESTS in INSTRUMENT PANELS - MDX article.