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HOMESERVICE MANUALSFORD2009RANGER 2D PICKUP, 2.3 D, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 153 (CRUISE CONTROL SYSTEM)DIAGNOSTIC TESTSSPEED CONTROLPINPOINT TESTSPINPOINT TEST F: FLASH CODE 4 - VEHICLE SPEED SIGNAL CIRCUIT FAILURE
2009 Ford Ranger 2D Pickup, 2.3 D, Automatic

Pinpoint Test F: Flash Code 4 - Vehicle Speed Signal Circuit Failure

2009 Ford Ranger 2D Pickup, 2.3 D, AutomaticSECTION Pinpoint Test F: Flash Code 4 - Vehicle Speed Signal Circuit Failure
WARNING: This page is about a different car, the 2008 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Speed Control for schematic and connector information.

Normal Operation 

The vehicle speed signal is sent from the PCM to the speed control actuator through circuit VMCO5 (VT/OG).

This pinpoint test is intended to diagnose the following:

  • Wiring, terminals or connectors
  • Speed control actuator

PINPOINT TEST F: FLASH CODE 4 - VEHICLE SPEED SIGNAL CIRCUIT FAILURE 

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connectors.
  1. F1 CHECK THE SPEEDOMETER OPERATION 
    • Check the speedometer for correct operation by driving the vehicle.
    • Does the speedometer operate correctly? 
    1. YES  : Go to  F2.
    2. NO  : REFER to INSTRUMENT CLUSTER (IC) & WARNING CHIMES article to continue diagnosis of the speedometer.
  2. F2 CHECK CIRCUIT VMCO5 (VT/OG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Speed Control Actuator C122
    • Disconnect: PCM C175b
      • Fig 1: Measuring Resistance
      GF0010778Courtesy of FORD MOTOR CO.
    • Measure the resistance between the PCM C175b-1, circuit VMCO5 (VT/OG), harness side and the speed control actuator C122-3, circuit VMCO5 (VT/OG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new speed control actuator. REFER to Speed Control Actuator . REPEAT the self-test.
    2. NO  : REPAIR the circuit. REPEAT the self-test.
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