• | 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 Wheel Column Tilt Switch B+ | 1 | 1 | -- | -- |
Steering Column Tilt Up Switch Signal | 1 | 1 | B2870 01 | -- |
Steering Column Tilt Down Switch Signal | 1 | 1 | B2875 01 | -- |
1. Tilt Malfunction |
The memory seat module (MSM) receives voltage inputs from the tilt switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt motor control circuits depending on which direction of movement is requested.
The ignition ON.
The MSM detects a tilt switch input for more than 30 consecutive seconds after the tilt motor movement has stopped.
• | The tilt 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• | A current DTC will clear when the failed switch input is no longer active.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 tilt switch may cause a DTC to set.
Steering Wheel and Column Description and Operation
Control Module References for Scan Tool Information
Ignition ON, view the appropriate scan tool Tilt Switch parameter while cycling the appropriate switch between states.The reading should change between Inactive and Active.
⇒ | 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 appropriate control circuit for a short to voltage. If the circuit tests normal, replace the MSM. |
• | Tilt Up Switch - control circuit terminal C |
• | Tilt Down Switch - control circuit terminal A |
⇒ | If not the specified value, test the appropriate control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
⇒ | If less than the specified range, replace the tilt switch. |
• | Tilt Up Switch - control terminal C |
• | Tilt Down Switch - control terminal A |
⇒ | If greater than the specified value, replace the tilt switch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for MSM replacement, setup, and programming |