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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1440 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test B: All Dimmable Switch Illumination Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

When the parking lamps are on, the Smart Junction Box (SJB) sends a Pulse Width Modulated (PWM) voltage to the hardwired dimmable illumination sources based on the input received from the instrument panel dimmer switch.

DTC FAULT TRIGGER CONDITIONS TABLE

DTC Description Fault Trigger Conditions
  • B106E - Solid State Driver Disabled Due to Short Circuit
 A continuous DTC that sets when the SJB has temporarily shut down the output driver. The module has temporarily disabled the backlighting output because an excessive current draw exists (such as a short to ground). The SJB cannot enable the backlighting output until the cause of the short is corrected, the DTCs have been cleared and a successful self-test is run.
  • B106F - Module Disabled Due to External Fault
 A continuous DTC that sets when the SJB has permanently shut down the output driver. The module has permanently disabled the backlighting output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the SJB can withstand. The cause of the excessive current draw MUST be corrected before a new SJB is installed.
  • B2A32 - LED Backlighting Output Circuit Open
 An on-demand DTC that sets when the SJB detects an open from the backlighting output circuit.
  • B2A33 - LED Backlighting Output Circuit Short To Ground
 A continuous and on-demand DTC that sets when the SJB detects a short to ground from the backlighting output circuit. The DTC also sets when fuse 10 (15A) has failed or is removed.
  • B29B7 - White Lighting Output Circuit Open
 An on-demand DTC that sets when the SJB detects an open from the white lighting (backlighting) output circuit.
  • B29B8 - White Lighting Output Circuit Short to Ground
 A continuous and on-demand DTC that sets when the SJB detects a short to ground from the white lighting (backlighting) output circuit. This DTC also sets when fuse 10 (15A) has failed or is removed.

This pinpoint test is intended to diagnose the following: 

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