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 MANUALSFORD2007FOCUS SES, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1627 (ENGINE CONTROLS - PINPOINT TEST KE: IDLE AIR CONTROL (IAC) VALVE THROUGH PINPOINT TEST Z: INTERMITTENT - (EXCEPT DIESEL & HYBRID))PINPOINT TEST QA: UNABLE TO ACTIVATE SELF-TEST/NETWORK COMMUNICATION ERRORINTRODUCTION
2007 Ford Focus SES, 4D Sedan, Standard
Pinpoint Test QA: Unable To Activate Self-Test/Network Communication Error: Introduction
2007 Ford Focus SES, 4D Sedan, StandardSECTION Introduction
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Milan, and 2006 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
PCM diagnostic tool protocol is dependant upon vehicle application and configuration. Refer to the appropriate SYSTEM WIRING DIAGRAMS
for schematic and connector information. Refer to the appropriate MODULE COMMUNICATIONS NETWORK
article
for description and operation information.
This pinpoint test addresses the following concerns:
- unable to communicate with PCM
- unable to activate the PCM self-test.
Possible causes:
- incorrect self-test procedure
- communication circuit open from PCM to the DLC
- PCM voltage or ground circuits PCM
- VREF circuit short to ground (Ford GT or Ranger)
PCM COMMUNICATION PROTOCOL AND VREF INFORMATION CHART
| Application | Engine | PCM Protocol | Measure the PCM VREF at: |
|---|---|---|---|
| E-150/E-250 | 4.6L | CAN | FRP |
| Escape/Mariner | All | CAN | TPS or FRPT |
| F-150 | 4.6L | CAN | FRP |
| Focus | All | CAN | TPS or FRPT |
| Ford GT | All | SCP | TPS |
| Freestar/Monterey | All | CAN | TPS |
| Fusion/Milan/Zephyr | All | CAN | ETBTPS |
| Lincoln LS | All | CAN | FRP |
| Ranger | All | SCP | TPS |
| Taurus | All | CAN | TPS |
| All Others | All | CAN | FRPT |
RENDER: 1.0x
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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.