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Pinpoint Tests

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Shift Interlock for schematic and connector information. Refer to appropriate SYSTEM WIRING DIAGRAMS article, Transmission Controls for schematic and connector information.

PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY 

  1. A1 TEST FUSE 32 (5A) 
    • Key in OFF position.
    • Check fuse: Fuse 32 (5A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A3.
    2. NO  : Go to  A2.
  2. A2 TEST CIRCUIT SBP32 (VT/RD) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Remove fuse 32 (5A).
    • Disconnect: Brake Pedal Position (BPP) Switch C278
      • Fig 1: Measuring Resistance
      GF0007060Courtesy of FORD MOTOR CO.
    • Measure the resistance between BPP switch C278-3, circuit SBP32 (VT/RD), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A3.
    2. NO  : REPAIR circuit SBP32 (VT/RD) for a short to ground. TEST the system for normal operation.
  3. A3 TEST CIRCUIT SBP32 (VT/RD) FOR AN OPEN 
    • Disconnect: Smart Junction Box (SJB) C2280B
      • Fig 2: Measuring Resistance Of Circuit SBP32A (VT/RD) Between SJB C2280B-28 & BPP Switch C278-3
      GF0010395Courtesy of FORD MOTOR CO.
    • Measure the resistance between SJB C2280B-28 and BPP switch C278-3, circuit SBP32 (VT/RD), harness side.
    • Is resistance less than 5 ohms? 
    1. YES  : Go to  A4.
    2. NO  : REPAIR circuit SBP32 (VT/RD) for an open. TEST the system for normal operation.
  4. A4 TEST THE BPP SWITCH 
      Fig 3: Measuring Resistance Of Brake Pedal Position (BPP) Switch Between C278-2 & C278-3 While Open & Closed
      GF0010396Courtesy of FORD MOTOR CO.
    • Measure the resistance between BPP switch C278-3 and C278-4, component side while applying (ON) and releasing (OFF) the brake pedal.
    • Is the resistance less than 5 ohms with the BPP switch applied and greater than 10,000 ohms with the BPP switch released? 
    1. YES  : Go to  A5.
    2. NO  : INSTALL a new BPP switch. TEST the system for normal operation.
  5. A5 TEST CIRCUIT CCB15 (BN/GN) FOR A SHORT TO GROUND 
    • Disconnect: Brake Shift Interlock Actuator (BSIA) C2008
    • Disconnect: PCM C175B
    • Disconnect: ABS C135
    • Disconnect: Speed Controller C122
    • Disconnect: SJB C2280D
    • Disconnect: 4X4 Control Module C281A (if equipped)
      • Fig 4: Measuring Resistance Of Circuit CCB15C (BN/GN) Between Shift Interlock Actuator C2008-3 & Ground
      GF0010397Courtesy of FORD MOTOR CO.
    • Measure the resistance between BSIA C2008-3, circuit CCB15 (BN/GN) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A6.
    2. NO  : REPAIR circuit CCB15 (BN/GN) for a short to ground. TEST the system for normal operation.
  6. A6 TEST CIRCUIT CCB15 (BN/GN) FOR AN OPEN 
      Fig 5: Measuring Resistance Of Circuit CCB15C (BN/GN) Between C2008-3 & (BPP) Switch C278-4
      GF0010398Courtesy of FORD MOTOR CO.
    • Measure the resistance between BSIA switch C2008-3 and BPP, circuit CCB15 (BN/GN), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A7.
    2. NO  : REPAIR circuit CCB15 (BN/GN) for an open. TEST the system for normal operation.
  7. A7 TEST CIRCUIT CDC58 (YE/GN) FOR A SHORT TO GROUND 
    • Disconnect: Ignition Switch C250
      • Fig 6: Measuring Resistance Of Circuit CBP20G (YE/VT) To Ground At Shift Interlock Actuator C2008-1
      GF0010399Courtesy of FORD MOTOR CO.
    • Measure the resistance between BSIA C2008-1, circuit CDC58 (YE/GN), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  A8.
    2. NO  : REPAIR circuit CDC58 (YE/GN) for a short to ground. TEST the system for normal operation.
  8. A8 TEST CIRCUIT CDC58 (YE/GN) FOR AN OPEN 
      Fig 7: Measuring Resistance
      GF0047323Courtesy of FORD MOTOR CO.
    • Measure the resistance between BSIA C2008-1 and C250-13, circuit CDC58 (YE/GN), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A9.
    2. NO  : REPAIR circuit CDC58 (YE/GN) for an open. TEST the system for normal operation.
  9. A9 TEST CIRCUIT GD161 (BK/YE) FOR AN OPEN 
      Fig 8: Measuring Resistance
      GF0007068Courtesy of FORD MOTOR CO.
    • Measure the resistance between BSIA C2008-2, circuit GD161 (BK/YE), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new BSIA. TEST the system for normal operation.
    2. NO  : REPAIR circuit GD161 (BK/YE) for an open. TEST the system for normal operation.

PINPOINT TEST B: SHIFT CONTROL IS OUT OF CORRECT GEAR RELATIONSHIP 

  1. B1 CHECK THE SELECTOR LEVER LINKAGE 
    • Key in ON position.
    • Apply the brake pedal.
    • Gain access to the selector lever linkage.
    • Move the selector lever in all ranges.
    • Observe all linkages during operation.
    • Is the linkage damaged? 
    1. YES  : INSTALL new components. TEST the system for normal operation.
    2. NO  : Go to  B2.
  2. B2 CHECK THE SELECTOR LEVER CABLE 
    • Check the selector lever cable and the bracket installation and tightness.
    • Is the selector lever cable correctly installed and adjusted? 
    1. YES  : VERIFY the selector lever cable adjustment. REFER to Selector Lever Cable Adjustment . ADJUST the selector lever cable if necessary. VERIFY the Transmission Range (TR) sensor for correct adjustment. REFER to AUTOMATIC TRANSMISSION - 5R44E & 5R55E article. ADJUST the TR sensor if necessary. Go to  B3 .
    2. NO  : REPAIR as necessary. TEST the system for normal operation.
  3. B3 CHECK THE SELECTOR LEVER LINKAGE/CABLE FOR CORRECT GEAR RELATIONSHIP 
    • Apply the brake pedal.
    • Move the selector lever in all ranges.
    • Does the indicator match the gear selection? 
    1. YES  : System OK. TEST the system for normal operation.
    2. NO  : REFER to Selector Lever Cable Adjustment . TEST the system for normal operation.

PINPOINT TEST C: THE Transmission Control Switch (TCS) IS NOT OPERATING CORRECTLY 

  1. C1 TEST FUSE 20 (10A) 
    • Key in OFF position.
    • Check fuse: 20 (10A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C3.
    2. NO  : Go to  C2.
  2. C2 CHECK THE VOLTAGE TO THE TCS 
    • Key in OFF position.
    • Disconnect: Transmission Control Switch (TCS) C279
    • Key in ON position.
      • Fig 9: Measuring Voltage On Circuit CBP20E (YE/VT) At TC Switch C279-1 & Ground
      GF0010401Courtesy of FORD MOTOR CO.
    • Measure the voltage between TCS C279-A, circuit CBP20 (YE/VT), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  C3.
    2. NO  : REPAIR circuit CBP20 (YE/VT). TEST the system for normal operation.
  3. C3 CHECK THE TCS 
      Fig 10: Measuring Resistance Between TC Switch C279-1 & TC Switch C279-2
      GF0010402Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCS C279-A and C279-B, component side, while pressing and releasing the TCS.
    • Is the resistance less than 5 ohms with the TCS pressed and greater than 10,000 ohms with the TCS released? 
    1. YES  : Go to  C4.
    2. NO  : INSTALL a new TCS. TEST the system for normal operation.
  4. C4 CHECK CIRCUIT CET34 (BN/GN) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: PCM C175B
      • Fig 11: Measuring Resistance Of Circuit CET34A (BN/GN) Between TC Switch C279-2 & PCM C175B-29
      GF0010403Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TCS C279-B and PCM C175B-29, circuit CET34 (BN/GN), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new PCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit CET34 (BN/GN). TEST the system for normal operation.
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