Steering Wheel and Column Schematic Icons
Steering Wheel and Column Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs
Scheme 1
Scheme 2
| Callout | Component Name |
|---|---|
| 1 | Upper Trim Cover |
| 2 | Lower Trim Cover |
| 3 | Shift Lever Seal |
| 4 | Shift Lever Screw |
| 5 | Shift Lever |
| 6 | Flanged Prevailing Torque Nut |
| 7 | Retaining Ring |
| 8 | SIR Coil |
| 9 | SIR Coil and Harness Assembly |
| 10 | Wave Washer |
| 11 | Bearing Retainer |
| 12 | Cam Orientation Plate |
| 13 | Turn Signal Cancel Cam Assembly |
| 14 | Upper Bearing Spring |
| 15 | Upper Bearing Inner Race Seat |
| 16 | Inner Race |
| 17 | Turn Signal Switch Housing |
| 18 | TORX® Head Screw |
| 19 | Pan Head Tapping Screws |
| 20 | Ignition Lock Cylinder Case Assembly |
| 21 | Pan Head Tapping Screw |
| 22 | Ignition Switch Assembly |
| 23 | Pan Head Tapping Screws |
| 24 | Turn Signal and Multifunction Switch Assembly |
| 25 | Axial Position Assurance Connector |
| 26 | Steering Column Tilt Head Assembly |
| 27 | Spring Guide |
| 28 | Tilt Spring |
| 29 | Release Lever Pin |
| 30 | Bearing Assembly |
| 31 | Steering Column Shaft Assembly |
| 32 | Tilt Knob |
| 33 | Pan Head Tapping Screws |
| 34 | Oval Head Soc Tap Screws |
| 35 | Linear Shift Assembly |
| 36 | TORX® Head Screws |
| 37 | Pivot Pins |
| 38 | Steering Column Support Assembly |
| 39 | Steering Column Jacket Assembly |
| 40 | Automatic Transmission Shift Lock Control |
| 41 | Adapter and Bearing Assembly |
| 42 | Steering Wheel Position Sensor Assembly |
| 43 | Sensor Retainer |
| 44 | Hexagon Head Nut |
| 45 | Intermediate Shaft |
| 46 | Bolt and Retainer Assembly |
Callouts For (Scheme 2)
Scheme 3
| Callout | Component Name |
|---|---|
| 1 | Upper Trim Cover |
| 2 | Lower Trim Cover |
| 3 | Flanged Prevailing Torque Nut |
| 4 | Retaining Ring |
| 5 | SIR Coil |
| 6 | SIR Coil and Harness Assembly |
| 7 | Wave Washer |
| 8 | Bearing Retainer |
| 9 | Shaft Lock Shield Assembly |
| 10 | Turn Signal Cancel Cam Assembly |
| 11 | Upper Bearing Spring |
| 12 | Upper Bearing Inner Race Seat |
| 13 | Inner Race |
| 14 | Lock Bolt |
| 15 | Lock Bolt Spring |
| 16 | Pan Head Tapping Screws |
| 17 | TORX® Head Screw |
| 18 | Ignition Lock Cylinder Case Assembly |
| 19 | Pan Head Tapping Screw |
| 20 | Ignition Switch Assembly |
| 21 | Steering Column Tilt Head Assembly |
| 22 | TORX® Head Screw |
| 23 | Release Lever Pin |
| 24 | Spring Guide |
| 25 | Tilt Spring |
| 26 | Bearing Assembly |
| 27 | Pan Head Tapping Screws |
| 28 | Turn Signal and Multifunction Switch Assembly |
| 29 | Axial Position Assurance Connector |
| 30 | Tilt Knob |
| 31 | Pan Head Tapping Screws |
| 32 | Steering Column Shaft Assembly |
| 33 | TORX® Head Screws |
| 34 | Pivot Pins |
| 35 | Steering Column Support Assembly |
| 36 | Steering Column Jacket Assembly |
| 37 | Adapter and Bearing Assembly |
| 38 | Bolt and Retainer Assembly |
| 39 | Hexagon Head Nut |
| 40 | Intermediate Shaft Assembly |
Callouts For (Scheme 3)
Scheme 4
| Callout | Component Name |
|---|---|
| 1 | C277 Steering Column Harness to Steering Wheel Harness |
| 2 | Inflatable Restraint Steering Wheel Coil C2 (AOL) |
| 3 | Inflatable Restraint Steering Wheel Coil C1 |
| 4 | Inflatable Restraint Steering Wheel Coil |
| 5 | C201 Steering Wheel Harness to I/P Harness |
| 6 | C221 Steering Wheel Harness to I/P Harness |
| 7 | C277 Steering Wheel Harness to steering Column Harness |
| 8 | Steering Wheel Control Switch Assembly-Upper Right (UK3) |
| 9 | Steering Wheel Control Switch Assembly-Lower Right (UK3) |
| 10 | Steering Wheel Control Switch Assembly-Lower Left (UK3) |
| 11 | Steering Wheel Control Switch Assembly-Upper Left (UK3) |
Callouts For (Scheme 4)
Circuit/System Description
The body control module (BCM) supplies 12 volts to the audio steering wheel control multiple momentary contact switches and monitors the return signal. Each switch is associated to a set resistance value, when pressed a specific voltage drop occurs through a series of resistors unique to that switch. The BCM identifies the selection, then sends a serial data message that is received by the component controlled, activating the feature.
The body control module (BCM) supplies 12 volts to the audio steering wheel control multiple momentary contact switches and monitors the return signal. Each switch is associated to a set resistance value, when pressed a specific voltage drop occurs through a series of resistors unique to that switch. The BCM identifies the selection, then sends a serial data message that is received by the component controlled, activating the feature.
Steering Wheel Controls Description and Operation
The steering wheel control switches duplicate the function of the primary controls of the associated component, through a network of multiple momentary contact switches and a series of resistors. The body control module (BCM) supplies voltage to the switches and monitors the return signal for when a switch is pressed, a specific voltage drop occurs. The BCM identifies the one selected, then sends a serial data message that is received by the component controlled, activating the feature.
This section is intended to diagnose the circuits between the BCM and the steering wheel control switches. If the primary control for the device is inoperative, refer to the appropriate section for the component the steering wheel control switch is functioning.
Steering Wheel and Column Description and Operation
The steering wheel and column has 4 primary functions
- Vehicle steering
- Vehicle security
- Driver convenience
- Driver safety