B2860

DTC B2860

Circuit Description

The memory seat and telescoping steering column position settings are stored in the left hand seat control module (SCM). The SCM measures and stores the steering column position by using a position sensor, which is an internal part of the telescoping actuator. The SCM provides the position sensor with a 5-volt reference and ground. The SCM monitors the position sensor signal voltage, which ranges from 0.1-4.78 volts depending on the steering column position. The steering column position sensor becomes active only when the SCM detects a steering column switch input.

DTC Descriptor

This diagnostic supports the following DTC:

DTC B2860 Telescope Position Sensor

Conditions for Setting the DTC

The steering column position sensor signal, to the SCM, is less than 0.1 volt or greater than 4.78 volts for 2 seconds or more.

Action Taken When the DTC Sets

* A history DTC B2860 is stored in the SCM memory.
* This DTC can only be set as a history code even if the malfunction is current.
* No driver warning message will be displayed for this DTC.
* The memory operation/function of the faulted position sensor is disabled.

Conditions for Clearing the DTC

* The steering column position sensor input, to the SCM, is within 0.1-4.78 volts for 2 seconds or more.
* A scan tool can clear this DTC.

Diagnostic Aids

* If the DTC does not reset after the code is cleared the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can often cause the malfunction to occur. Refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
* The following conditions may also cause an intermittent malfunction:
^ There is an intermittent open, short to ground, or short to voltage in steering column telescope motor signal circuit.
^ The steering column position sensor is open or shorted internally.
* If the SCM is unable to determine the correct steering column position, limited manual operation of the telescoping steering column will be functional, but the SCM will be unable to recall the correct memory settings.
* Using a scan tool, select SCM data display and monitor the Column Position Feedback data. Operate the steering column in both directions while monitoring the position sensor data. The voltage should range from 0.1-4.78 volts depending on the steering column position.

Test Description

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for the proper operation of the circuit in the high voltage range.
4. This step tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
5. This step tests for a short to ground in the 5-volt reference circuit.

Step 1 - Step 6:

Step 7 - Step 15: