Pinpoint Test A: The Ic Is Inoperative

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 will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .

A1 RETRIEVE THE RECORDED DTCs FROM THE IC SELFTEST
- Check for recorded IC DTCs from the self-test.
- Is DTC U2472 recorded?
- Yes : Go To PINPOINT TEST AX .
- No : GO to A2.
A2 CHECK THE IC B+ VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: IC C220.
- Measure the voltage between the IC C220-19, circuit SBP26 (YE/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between IC C220-19, Circuit SBP26 (YE/RD) And Ground
  Courtesy 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 for an open. TEST the system for normal operation. If not OK, REFER to the appropriate Systems Wiring Diagram to identify the possible causes of the circuit short.
A3 CHECK THE IC GROUND CIRCUIT GD114 (BK/BU) FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the IC C220-9, circuit GD114 (BK/BU), harness side and ground.
  
  Fig 2: Measuring Resistance Between IC C220-9, Circuit GD114 (BK/BU) And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to A4.
- No : REPAIR the circuit. TEST the system for normal operation.
A4 CHECK FOR CORRECT IC OPERATION
- Disconnect the IC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new IC . REFER to INSTRUMENT CLUSTER (IC) . 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.