Pinpoint Test M: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test M: The Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
The Front Controls Interface Module (FCIM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN). Voltage to the FCIM is provided by circuit SBP16 (VT/RD). Ground is provided by circuit GD114 (BK/BU).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- FCIM
PINPOINT TEST M: THE FCIM DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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M1 CHECK THE FCIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: FCIM C2402 (Without Navigation ACM) or C2403 (With Navigation ACM).
- Ignition ON.
- For vehicles without a navigation ACM, measure the voltage between the FCIM C2402-1, circuit SBP16 (VT/RD), harness side and ground.
- For vehicles with a navigation ACM, measure the voltage between the FCIM C2403-5, circuit SBP16 (VT/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to M2.
No
VERIFY the Smart Junction Box (SJB) fuse 16 (15A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the short circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
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M2 CHECK THE FCIM GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- For vehicles without a navigation ACM, measure the resistance between the FCIM C2402-4, circuit GD114 (BK/BU), harness side and ground.
- For vehicles with a navigation ACM, measure the resistance between the FCIM C2403-8, circuit GD114 (BK/BU), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
For vehicles without a navigation ACM, GO to M3.
For vehicles with a navigation ACM, GO to M4.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
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M3 CHECK THE MS-CAN CIRCUITS BETWEEN THE FCIM AND THE DLC FOR AN OPEN - WITHOUT A NAVIGATION ACM
- Measure the resistance between the FCIM C2402-2, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side.
- Measure the resistance between the FCIM C2402-3, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to M5.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
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M4 CHECK THE MS-CAN CIRCUITS BETWEEN THE FCIM AND THE DLC FOR AN OPEN - WITH A NAVIGATION ACM
- Measure the resistance between the FCIM C2403-1, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side.
- Measure the resistance between the FCIM C2403-2, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to M5.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
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M5 CHECK FOR CORRECT FCIM OPERATION
- Disconnect the FCIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FCIM 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 FCIM. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
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