B0856

CIRCUIT DESCRIPTION
The telescoping steering column actuator and seat adjuster motors are equipped with position sensors. The position sensors are supplied with a common 5 volt reference circuit and low reference circuit from the memory seat module. The memory seat module receives a signal voltage from each position sensor whenever a memory seat module output function is active.

CONDITIONS FOR RUNNING THE DTC
The memory seat module detects a switch signal active or a memory function request.

CONDITIONS FOR SETTING THE DTC
^ The memory seat module detects the position sensor 5 volt reference circuit under 4.0 volts or over 5.2 volts.
^ The condition must be present for 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ A history DTC is stored in the memory seat module.
^ Memory seat module DTCs can only be set as history codes even if the malfunction is current.
^ Memory functions will be disabled as long as the fault is current.

CONDITIONS FOR CLEARING THE DTC
Memory seat module DTCs may be cleared only by using a scan tool or the IPC clearing DTCs feature.

DIAGNOSTIC AIDS
^ Monitor the position sensor reference parameter in the SCM data list, if the fault is current disconnecting position sensor connectors or the in line connector to the steering column may help to determine where the fault is occurring.
^ If the fault is not current and all the adjuster motors operate through the full range of adjustment the problem may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST DESCRIPTION

Steps 1-8:

The number(s) below refer to the step number(s) on the diagnostic table.
3. This step determines if the fault is in the position sensor 5 volt reference circuit.