Pinpoint Test N: The FDIM Is Inoperative - Vehicles With Navigation
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 will result in false resistance readings. REFER to
BATTERY, MOUNTING AND CABLES
.
- N1 CHECK THE FDIM VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: FDIM C2123.
- Measure the voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C2123-1 SBP14 (BN/RD) - Ground - Is the voltage greater than 11 volts?
- Yes : GO to N2.
- No : VERIFY the Smart Junction Box (SJB) fuse 14 (10A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible causes of the circuit short.
- N2 CHECK THE FDIM GROUND CIRCUIT FOR CONTINUITY
- Disconnect: Negative Battery Cable.
- Measure the resistance
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C2123-7 GD115 (BK/GY) - Ground - Is the resistance less than 3 ohms?
- Yes : GO to N3.
- No : REPAIR the circuit. TEST the system for normal operation.
- N3 CHECK THE FDIM ENABLE CIRCUIT FOR CORRECT VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Turn the audio system on using the power button on the Front Controls Interface Module (FCIM).
- Measure the voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C2123-5 CMN23 (WH/BU) - Ground - Is the voltage between 4.5 and 9.5 volts?
- Yes : GO to N6.
- No : GO to N4.
- N4 CHECK THE FDIM ENABLE CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C290C.
- Ignition ON.
- Measure the voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C2123-5 CMN23 (WH/BU) - Ground - Is any voltage present?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to N5.
- N5 CHECK THE FDIM ENABLE CIRCUIT FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C2123-5 CMN23 (WH/BU) C290C-4 CMN23 (WH/BU) C2123-5 CMN23 (WH/BU) - Ground - Is the resistance less than 3 ohms between the FDIM and the ACM, and greater than 10, 000 ohms between the FDIM and ground?
- Yes : GO to N6.
- No : REPAIR the circuit. TEST the system for normal operation.
- N6 ISOLATE THE VIDEO CABLE
- Connect: ACM C290C.
- Substitute each video cable one at a time by routing a new component. Do not remove the original antenna cable at this time.
- Connect: FDIM C2123.
- Ignition ON.
- Operate the audio system and observe the FDIM screen.
- Does the system operate correctly?
- Yes
: INSTALL a new video cable for the inoperative cable.
REFER to VIDEO CABLE .
- No : GO to N7.
- N7 ISOLATE THE FDIM
- INSTALL a new FDIM. REFER to FRONT DISPLAY INTERFACE MODULE (FDIM) .
- Ignition ON.
- Operate the audio system and observe the FDIM screen.
- Does the system operate correctly?
- Yes
: The cause of the concern was an inoperative FDIM.
The system is now operating correctly.
- No : GO to N8.
- N8 CHECK FOR CORRECT ACM OPERATION
- Ignition OFF.
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new ACM. REFER to AUDIO CONTROL MODULE (ACM) . 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.