2003.25 - 2004 Ford 6.0L Throttle Control Diagnostics

Technical Support Subject 2003.25 - 2004 Ford 6.7L Throttle Control Diagnostics Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VRTC-008 A Tech Document Release SP 31 Jul 2015 Db 31 Jul 2015 N/A 31 Jul 2015 Page 1 of 2 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 System or Parts affected Underhood70 V900080 Underhood150 V910006  Throttle Control P/N# 3550723  Throttle Control P/N# 3550723 Before you start Most Throttle Control issues are due to poor electrical connections and/or poor grounding. VMAC recommends that all electrical connections (with the exception of the clutch connector in the engine bay) be soldered and shrink wrapped. We do not recommend using bullet connectors. Overview Figure 1 Check Pins 4) Check Ground 1) Measure Voltage 2) Measure Voltage 5) Check Connection 3) Check Ground 6) Check Connection Technical Support Subject 2003.25 - 2004 Ford 6.7L Throttle Control Diagnostics Document Version Department Revision Details Revised by Tech Engineering Implemented EXT-VRTC-008 A Tech Document Release SP 31 Jul 2015 Db 31 Jul 2015 N/A 31 Jul 2015 Page 2 of 2 Knowledge Base: www.kb.vmacair.com Email: tech@vmacair.com Web: www.vmacair.com Technical Support: 1(888)241-2289 Toll Free:1(800)738-8622 Fax: 1(877)740-3201 Isolate Issues: 1) With the engine off, key in the run position and park brake applied, measure the voltage to the RED throttle control +12V wire (Should be +12V DC). This will be powered when compressor is turned on. 2) With the engine off, key in the run position and park brake applied, measure voltage on the RED wire running to the WHITE interface connector (Should be +12V DC). This will be powered when key switch is on. 3) Measure the resistance of the GREEN ground connection from the throttle controller to the vehicle battery’s negative terminal. This reading should be less than 1 ohm. 4) Measure resistance between WHITE interface connector ground terminal and battery negative terminal. This reading should be less than 1 ohm. 5) Check the BLACK wire from the WHITE interface connector, ensure it is a good soldered connection to the BLACK DDC wires and the light GREEN wire with RED stripe going to the Park Brake Switch. The DDC switch is only used with Automatic Transmissions, if Manual Transmission check connection between the BLACK wire from WHITE interface connector to the light GREEN wire with RED stripe going to the Park Brake Switch. 6) Check the WHITE wire from the throttle controller to the “clean tach out” circuit 76 (see wiring diagram) at the blunt-cut harness. Ensure this is a good soldered connection.