Pinpoint Test

CHECK THE Infotainment Controller Area Network (I-CAN) TERMINATION RESISTANCE
1. Ignition OFF.
2. Measure:
  
  Fig 1: Measuring Infotainment Controller Area Network (I-CAN) Connector Terminals
  Courtesy of FORD MOTOR CO.
  - Is the resistance between 54 and 66 ohms?
  1. Yes: GO to 3 on page 3.
  2. No: GO to 2 on page 2.
CHECK THE Infotainment Controller Area Network (I-CAN) TERMINATION RESISTANCE WITH THE Audio Control Module (ACM) DISCONNECTED
1. Disconnect: Audio Control Module (ACM) C240A.
2. Measure:
  
  Fig 2: Measuring Infotainment Controller Area Network (I-CAN) Connector Terminal
  Courtesy of FORD MOTOR CO.
  - Is the resistance between 108 and 132 ohms?
  1. Yes: GO to 5 on page 5.
  2. No: REFER to DIAGNOSTIC ROUTINE H .
CHECK THE Audio Control Module (ACM) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
1. Ignition OFF.
2. Disconnect: Audio Control Module (ACM) C240A.
3. Ignition ON.
4. Measure:
  
  Fig 3: Measuring Audio Control Module (ACM) Connector Terminal
  Courtesy of FORD MOTOR CO.
  - Are the voltages greater than 11 volts?
  1. Yes: GO to 4 on page 4.
  2. No: VERIFY the Body Control Module (BCM) fuse 29 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
CHECK THE Audio Control Module (ACM) GROUND CIRCUIT FOR AN OPEN
1. Ignition OFF.
2. Measure:
  
  Fig 4: Measuring Audio Control Module (ACM) Connector Terminal
  Courtesy of FORD MOTOR CO.
  - Is the resistance less than 3 ohms?
  1. Yes: GO to 8 on page 7.
  2. No: REPAIR the circuit.
CHECK THE Infotainment Controller Area Network (I-CAN) CIRCUITS BETWEEN THE Audio Control Module (ACM) AND THE Data Link Connector (DLC) FOR AN OPEN
1. Measure:
  
  Fig 5: Measuring Infotainment Controller Area Network (I-CAN) Connector Terminals
  Courtesy of FORD MOTOR CO.
  - Are the resistances less than 3 ohms?
  1. Yes: GO to 6 on page 5.
  2. No: REPAIR the circuit in question.
CHECK THE Infotainment Controller Area Network (I-CAN) CIRCUITS FOR A SHORT TO POWER
1. Connect: Audio Control Module (ACM) C240A.
2. Ignition ON.
3. Measure:
  
  Fig 6: Measuring Infotainment Controller Area Network (I-CAN) Connector Terminals
  Courtesy of FORD MOTOR CO.
  - Is the voltage greater than 3 volts on either circuit?
  1. Yes: REPAIR the circuit in question.
  2. No: GO to 7 on page 6.
CHECK THE Infotainment Controller Area Network (I-CAN) CIRCUITS FOR A SHORT TO GROUND
1. Ignition OFF.
2. Measure:
  
  Fig 7: Measuring Infotainment Controller Area Network (I-CAN) Connector Terminals
  Courtesy of FORD MOTOR CO.
  - Are the resistances greater than 10,000 ohms?
  1. Yes: GO to 8 on page 7.
  2. No: REPAIR the circuit in question.
CHECK FOR CORRECT Audio Control Module (ACM) OPERATION
1. Ignition OFF.
2. Disconnect and inspect the Audio Control Module (ACM) connectors.
3. Repair:
  - corrosion (replace connector or terminals - clean module pins)
  - damaged or bent pins - replace terminals/pins
  - pushed-out pins - replace pins as necessary
4. Reconnect the Audio Control Module (ACM) connectors. Make sure they seat and latch correctly.
5. Operate the system and verify the concern is still present.
  - Is the concern still present?
  1. Yes: CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, discontinue this test and follow Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new Audio Control Module (ACM). REFER to AUDIO CONTROL MODULE (ACM) (Premium), REFER to AUDIO CONTROL MODULE (ACM) (Premium Plus) or REFER to AUDIO CONTROL MODULE (ACM) (Sony® Sound).
  2. No: The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.