• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
5 Volt Reference | B2860 06, B2880 06 | B2860 06, B2880 06 | B2860 01, B2880 01 | -- |
Steering Column Tilt Sensor Signal | B2880 06 | B2880 06 | B2880 01 | B2880 5A |
Steering Column Telescope Sensor Signal | B2860 06 | B2860 06 | B2860 01 | B2860 5A |
Steering Column Tilt Motor Control - Up | B2880 61 | B2880 61 | B2880 61 | -- |
Steering Column Tilt Motor Control - Down | B2880 61 | B2880 61 | B2880 61 | -- |
Steering Column Telescope Motor Control - Forward | B2860 61 | B2860 61 | B2860 61 | -- |
Steering Column Telescope Motor Control - Reverse | B2860 61 | B2860 61 | B2860 61 | -- |
Low Reference | -- | B2860 06, B2880 06 | B2860 01 | -- |
The memory seat module (MSM) determines the position of the steering column based on inputs received from the tilt position sensor, built into the tilt actuator. The MSM supplies a 5-volt reference and a low reference to the sensor and monitors the column position via the steering column tilt sensor signal circuit.
Ignition ON
The steering column tilt sensor signal voltage is greater than 4.8 volts for more than 2 seconds.
The steering column tilt sensor signal voltage is less than 0.2 volt for more than 2 seconds.
An incorrect steering column tilt sensor signal voltage is seen.
The steering column tilt sensor signal voltage does not change when the telescope actuator is commanded.
Steering column tilt operation are suspended.
• | A current DTC will clear when the malfunction is no longer present |
• | A history DTC will clear after 40 malfunction-free ignition cycles. |
The power column features such as the power tilt/telescope switch, tilt/telescope actuator, and tilt/actuator assembly are all internal to the steering column assembly. These items are non-serviceable and a steering column replacement needs to be done upon the failure of any of these components.
Tilt/Telescoping Steering Column Schematics
Steering Wheel and Column Description and Operation
Control Module References for Scan Tool Information
⇒ | If the parameters do not cycle between the specified values, refer to Steering Column Tilt/Telescoping Inoperative |
⇒ | If not within the specified range, refer to Tilt Sensor Circuit Malfunction. |
⇒ | If the column does not operate as specified, refer to Tilt Actuator Circuit Malfunction. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If greater than the specified range, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If the test lamp does not illuminate, test both control circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the MSM. |
⇒ | If greater than the specified range, replace the steering column. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for MSM replacement, setup, and programming |