Memory Seat/Mirror Module Diagnostic Modes

In order to enter the manual diagnostic modes of the memory seat/mirror module, the ignition switch must be in the OFF position. If the ignition is set to the RUN or START positions while the module is in a diagnostic mode, the module will exit diagnostics and sound 3 chimes.

Mode 1 diagnostics of the memory seat/mirror module is used in order to test all memory, seat and mirror switch inputs. In order to enter mode 1 of the manual diagnostics, the memory seat/mirror diagnostic connector must be grounded. The diagnostic connector may be taped into the harness. When the connector is grounded, the module will chime once in order to acknowledge entrance into mode 1 diagnostics. This connector must remain grounded throughout mode 1 diagnostics. If ground at the connector is lost for more than 5 seconds, then the module will exit diagnostics and sound 3 chimes. All memory, seat and mirror functions are disabled during mode 1. In order to test the inputs, the memory, seat or mirror switch is operated as if performing that function. Each time the memory seat/mirror module sees an input from a switch, the module chimes once. If a switch is operated and the module does not chime, the module did not receive the input. This may indicate a problem with the switch or the wiring from the switch to the module.

Mode 2 diagnostics is used in order to test the seat and mirror position sensor inputs. In order to enter mode 2 of the manual diagnostics, while in mode 1 diagnostics, the ground is removed from the memory seat/mirror diagnostic connector and then reapplied within 5 seconds. The module will then chime twice in order to acknowledge that the module has entered mode 2 diagnostics. Again, if ground at the connector is lost for more than 5 seconds, the module will exit diagnostics and sound three chimes. In order to test the inputs, the LH seat switch or outside mirror switch is operated to command the seat or mirror to move and the position sensor input for that direction is tested. For example, if the seat is commanded to move forward, the module will test the horizontal position sensor. If the module sounds a chime when a switch is being operated, then the module senses a discontinuity in that direction's position sensor. That means there may be a problem with the position sensor or the wiring from the module to the position sensor.

In order to exit the diagnostic mode, either remove the ground from the memory seat/mirror module diagnostic connector for more than 5 seconds or turn the ignition to the RUN or START position. When the module exits the diagnostic mode, the module will sound 3 chimes in order to acknowledge that it is no longer in diagnostic mode.