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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 436 (Information Center - Instrumentation, Message Center, And Warning Chimes) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test A: The Instrument Panel Cluster (IPC) Is Inoperative >> Pinpoint Test A: The IPC Is Inoperative

Pinpoint Test A: The IPC Is Inoperative

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed results in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
  1. A1 RETRIEVE THE DTCs FROM THE IPC SELF-TEST 
    • Check for recorded DTCs from the IPC self-test.
    • Is DTC U300A:94 present? 
  2. A2 CHECK THE IPC VOLTAGE SUPPLY WITH KEY OFF 
    • Ignition OFF.
    • Disconnect: IPC C220.
    • Measure the voltage between the IPC C220-1, circuit SBP26 (YE/RD), harness side and ground.
      Fig 1: Measuring Voltage Between IPC C220-1, Circuit SBP26 (YE/RD) And Ground
      G06403505Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to A3.
    • No  : VERIFY the SJB fuse 26 (10A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short. TEST the system for normal operation.
  3. A3 CHECK THE GROUND CIRCUIT FOR AN OPEN 
    • Disconnect: Negative Battery Cable.
    • Measure the resistance between the IPC C220-8, circuit GD116 (BK/VT), harness side and ground.
      Fig 2: Measuring Resistance Between IPC C220-8, Circuit GD116 (BK/VT) And Ground
      G06403506Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to A4.
    • No  : REPAIR the circuit. TEST the system for normal operation.
  4. A4 CHECK FOR CORRECT IPC OPERATION 
    • Disconnect the IPC connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IPC connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new IPC. REFER to INSTRUMENT PANEL CLUSTER (IPC) . TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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