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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1098 (MULTIFUNCTION Electronic Modules System) >> Diagnostic Tests >> Smart Junction Box (SJB) >> Inspection and Verification

Inspection and Verification

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of electrical damage.
    VISUAL INSPECTION CHART

    Electrical
    • Battery junction box (BJB) MEGA fuse (100A)
    • Smart junction box (SJB) fuse 53 (30A)
    • Circuitry
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    4. NOTE: Make sure to use the latest scan tool software release.
  4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
    5. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  5. If the scan tool does not communicate with the VCM:
    • Check the VCM connection to the vehicle.
    • Check the scan tool connection to the VCM.
    • Refer to MODULE COMMUNICATIONS NETWORK , No Power to The Scan Tool, to diagnose no communication with the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • Verify the ignition key is in the ON position.
    • Verify the scan tool operation with a known good vehicle.
    • Refer to MODULE COMMUNICATIONS NETWORK to diagnose no response from the PCM.
  7. Carry out the network test.
    • If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
    • If the network test passes, retrieve and record the continuous memory DTCs.
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
  9. If the DTCs retrieved are related to the concern, go to Diagnostic Trouble Code (DTC) Chart .
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
SMART JUNCTION BOX (SJB) DTC CHART

DTC Description Action
B106E Solid State Driver Disabled Due to Short Circuit Go to Pinpoint Test A .
B106F Module Disabled Due to External Fault Go to Pinpoint Test A .
B2048 Left Rear Turn Lamp Circuit Short to Ground Go to Pinpoint Test B .
B2050 Right Rear Turn Lamp Circuit Short to Ground Go to Pinpoint Test B .
B2477 Module Configuration Failure REFER to MODULE CONFIGURATION .
B2949 Global Opening/Closing Circuit Short to Battery Go to Pinpoint Test B .
B2A2B Left Corner Lamp Output Circuit Short to Ground Go to Pinpoint Test B .
B2A2C Right Corner Lamp Output Circuit Short to Ground Go to Pinpoint Test B .
B2A38 Floor Lamp Output Circuit Short to Ground Go to Pinpoint Test B .
U0155 Lost Communication With Instrument Panel Cluster (IC) Control Module
NOTE: Diagnose SJB or instrument cluster (IC) DTC B1318 (if present) before diagnosing this DTC.
CARRY OUT the IC self-test using the scan tool.
  • If DTC U0155 is present in both the IC and the SJB, INSTALL a new IC. REFER to INSTRUMENT CLUSTER . CLEAR the DTCs. REPEAT the self-test.
  • If DTC U0155 is not present in the IC, INSTALL a new SJB. REFER to Smart Junction Box (SJB) . REPEAT the self-test.
U2050 No Application Present CONFIGURE the SJB. REFER to MODULE CONFIGURATION . CLEAR the DTCs. REPEAT the self-test. If DTC U2050 is retrieved again, INSTALL a new SJB. REFER to Smart Junction Box (SJB) . TEST the system for normal operation.
All other DTCs - REFER to Diagnostic Trouble Code (DTC) Chart .
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