Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2009RV CUTAWAY 6.8 SREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 175 (MODULE COMMUNICATIONS NETWORK)DIAGNOSIS AND TESTINGCOMMUNICATIONS NETWORKSYMPTOM CHART

2009 Ford RV Cutaway 6.8 S

Symptom Chart

2009 Ford RV Cutaway 6.8 SSECTION Symptom Chart

WARNING: This page is about a different car, the 2009 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The PCM does not respond to the scan tool	Wiring, terminals or connectors PCM	REFER to the INTRODUCTION - GASOLINE MODELS , Section 5, pinpoint test QA before proceeding to Pinpoint Test A . If pinpoint test QA has been completed, Go To PINPOINT TEST A .
The ABS module does not respond to the scan tool	Fuse Wiring, terminals or connectors ABS module	Go To PINPOINT TEST B .
The Instrument Cluster (IC) does not respond to the scan tool	Fuse Wiring, terminals or connectors IC	Go To PINPOINT TEST C .
The Restraints Control Module (RCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors RCM	Go To PINPOINT TEST D .
The Trailer Brake Control (TBC) module does not respond to the scan tool	Fuse Wiring, terminals or connectors TBC module	Go To PINPOINT TEST E .
The Smart Junction Box (SJB) does not respond to the scan tool	Fuse Wiring, terminals or connectors SJB	Go To PINPOINT TEST F .
NOTE: The base ACM does not communicate on the Medium Speed Controller Area Network (MS-CAN). Refer to INFORMATION AND ENTERTAINMENT SYSTEMS . The premium sound Audio Control Module (ACM) does not respond to the scan tool	Fuse Wiring, terminals or connectors ACM	Go To PINPOINT TEST G .
The Parking Aid Module (PAM) does not respond to the scan tool	Fuse Wiring, terminals or connectors PAM	Go To PINPOINT TEST H .
No Medium Speed Controller Area Network (MS-CAN) communication, all modules are not responding	Wiring, terminals or connectors SJB ACM (if equipped) In-dash computer (if equipped) PAM (if equipped) IC	Go To PINPOINT TEST I .
Intermittent no Medium Speed Controller Area Network (MSCAN) communication, communication can be intermittently established	Wiring, terminals or connectors	Go To PINPOINT TEST J .
No High Speed Controller Area Network (HS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ABS module IC PCM RCM TBC module (if equipped) Telematics module (if equipped)	Go To PINPOINT TEST K .
Intermittent no High Speed Controller Area Network (HS-CAN) communication, one or more modules are not responding during network test.	Wiring, terminals or connectors	Go To PINPOINT TEST L .
No power to the scan tool	Fuse Wiring, terminals or connectors Scan tool Data Link Connector (DLC)	Go To PINPOINT TEST M .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.