• | 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 |
---|---|---|---|---|
Steering Column Tilt Up Switch Signal | 1 | 1 | B2870 01 | -- |
Steering Column Tilt Down Switch Signal | 1 | 1 | B2875 01 | -- |
Steering Column Telescope Reverse Switch Signal | 2 | 2 | B2855 01 | -- |
Steering Column Telescope Forward Switch Signal | 2 | 2 | B2850 01 | -- |
1. Tilt Malfunction 2. Telescope Malfunction |
The memory seat module (MSM) receives voltage inputs from the tilt/telescope switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt or telescope motor control circuits depending on which direction of movement is requested.
Ignition ON.
The MSM detects a telescope forward switch input for more than 30 consecutive seconds after forward movement of the motor has stopped.
• | The telescope motor will be deactivated. |
• | Memory recall functions will be disabled. |
• | A current DTC will clear when the failed switch input is no longer active. |
• | A history DTC will clear after 100 ignition cycles. |
• | An intermittently stuck telescope switch may cause this DTC to set. |
• | The power column features such as the power tilt steering wheel and the telescopic steering wheel are internal to the steering column and only replaced as a complete unit. So any power actuator or switch replacement can only be done as a complete unit. |
Tilt/Telescoping Steering Column Schematics
Steering Wheel and Column Description and Operation
Control Module References for Scan Tool Information
Ignition ON, view the scan tool Telescope IN/OUT Switch parameter while cycling the tilt/telescope switch between the forward and neutral position. The parameter should change between Active and Inactive.
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
⇒ | If not the specified value, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the MSM. |
⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
• | B+ terminal 1 and signal terminal 5 |
• | B+ terminal 1 and signal terminal 6 |
• | B+ terminal 1 and signal terminal 2 |
• | B+ terminal 1 and signal terminal 3 |
⇒ | If less than the specified range, replace the tilt/telescope switch. |
⇒ | If greater than the specified range, replace the steering column. |
⇒ | If greater than the specified range, replace the steering column. |
⇒ | If greater than the specified range, replace the steering column. |
⇒ | 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 |