Steering Column Switches: Overview Ford Fusion I рестайлинг

The steering column switches consist of the following

1. Multifunction switch
2. Ignition switch

The steering column switches receive driver inputs and send signals to various components. The multifunction switch controls the windshield wipers, hazard flasher, turn signal, headlamp low/high beam and headlamp dimmer/flash-to-pass. The ignition switch is used in conjunction with the lock cylinder key to start the vehicle. When the lock cylinder key is switched to different positions, it moves linkages which enable the ignition switch to send battery voltage to various components.

Special Tools Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent Flex Probe Kit 105-R025B or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

Scheme 1

Scheme 2

Principles of Operation

Note. The Smart Junction Box (SJB) is also identified as the Generic Electronic Module (GEM).

Steering Column Switches - The steering column switches include the ignition switch and the multifunction switch (high beam/low beam, flash-to-pass, turn signal and windshield wiper). The ignition switch is controlled by the ignition lock cylinder with a key. When the ignition lock cylinder is turned using the key, a mechanical connection positions the ignition switch to the selected position and allows the ignition switch to send voltage to specific components. The multifunction switch controls the various components electrically. The headlamp switch sends constant voltage to the headlamps when placed in the ON position, while the flash-to-pass is a momentary switch used to send voltage to the headlamp high beams only. The headlamp high beam/low beam switch sends voltage to the low or high beam headlamps while the headlamps are on. The turn signal switch portion of the multifunction switch operates the left and right turn signals. The windshield wiper switch function uses a ground signal to activate the various wiper modes and the wiper/washer.

Normal Operation

The ignition switch receives fused battery voltage from Battery Junction Box (BJB) fuse 14 (15A) along circuit SBB14 (BN/RD). The ignition switch has 4 possible states

1. OFF
2. ACC
3. RUN
4. START

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Ignition switch
4. BJB

The ignition switch ACC circuit provides fused ignition voltage, along circuit CDC33 (VT/GN) to the Smart Junction Box (SJB), when the key is in the ACC position.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Ignition switch
3. SJB

The ignition switch RUN circuit provides fused ignition voltage, along circuit CDC34 (WH/OG) to the Smart Junction Box (SJB), when the key is in the RUN position.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Ignition switch
3. SJB

The ignition switch START circuit provides fused ignition voltage, along circuit CDC35 (BU/WH) to the Smart Junction Box (SJB), when the key is in the START position.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Ignition switch
3. SJB