Secondary/Configurable Control Schematic Icons
Secondary/Configurable Control 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 . 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 | Steering Wheel Control Switch Assembly - Upper Left (STW) |
| 2 | Passlock Sensor Connector (w/o BAE) |
| 3 | Ignition Key Alarm Switch |
| 4 | Ignition Lock Cylinder Control Actuator |
| 5 | Ignition Lock Cylinder Control Actuator Connector |
| 6 | Ignition Switch |
| 7 | Ignition Key Cylinder |
| 8 | Steering Wheel Control Switch Assembly - Upper Right (STW) |
| 9 | Horn Switch |
| 10 | Steering Wheel Control Switch Assembly - Lower Right (STW) |
| 11 | C277 |
| 12 | Steering Wheel Control Switch Assembly - Lower Left (STW) |
| 13 | Turn Signal/Multifunction Switch |
Scheme 3
| Connector Part Information OEM: 50-57-9404 Service: Service by Harness - See Part Catalog Description: 4-Way F (BK) |
|---|
| Terminal Part Information Terminal/Tray: See Terminal Repair Kit Core/Insulation Crimp: See Terminal Repair Kit Release Tool/Test Probe: See Terminal Repair Kit |
Steering Wheel Control Switch Assembly - Lower Left (STW) Connector Parts Information
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | BN | 230 | Instrument Panel Lamps Dimming Control |
| 2 | YE | 1327 | DIC Fuel Signal |
| 3 | D-BU | 894 | DIC Toggle Switch Signal |
| 4 | BK | 2250 | Ground |
Steering Wheel Control Switch Assembly - Lower Left (STW) Connector Terminal Identification
Scheme 4
| Connector Part Information OEM: 50-57-9405 Service: Service by Harness - See Part Catalog Description: 5-Way F (BK) |
|---|
| Terminal Part Information Pins: 1-4 Terminal/Tray: See Terminal Repair Kit Core/Insulation Crimp: See Terminal Repair Kit Release Tool/Test Probe: See Terminal Repair Kit |
Steering Wheel Control Switch Assembly - Lower Right (STW) Connector Parts Information
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | BN | 230 | Instrument Panel Lamps Dimming Control |
| 2 | D-GN | 1358 | DIC Switch Signal |
| 3 | OG | 1816 | DIC Set/Reset Switch Signal |
| 4 | BK | 2250 | Ground |
| 5 | Not Used |
Steering Wheel Control Switch Assembly - Lower Right (STW) Connector Terminal Identification
Circuit/System Description
The body control module (BCM) supplies voltage 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 voltage 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.
Description and Operation
Steering Wheel Controls Description and Operation
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 diagnosis 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.