Pinpoint Test D: DTC B1987, B1991 Or B2275

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

D1 CHECK THE DSM HALL-EFFECT CIRCUITS FOR AN OPEN

Ignition OFF.
Disconnect: Adjustable Pedal Motor C2159.
Disconnect: DSM C341C.

Measure the resistance between DSM C341C, harness side and adjustable pedal motor C2159, harness side as indicated in the following chart:

DSM REFERENCE CHART

DSM	Circuit	Adjustable Pedal Motor
C341C-15	RPP06 (GN)	C2159-3
C341C-3	LPP06 (YE/BU)	C2159-4

Fig 1: Measuring Resistance Between DSM C341C, Harness Side And Adjustable Pedal Motor C2159, Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes: Go to D2 .
No: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.

D2 CHECK THE DSM HALL-EFFECT CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between ground and:
  - DSM C341C-3, circuit LPP06 (YE/BU), harness side.
  - DSM C341C-15, circuit RPP06 (GN), harness side.
    
    Fig 2: Measuring Resistance Between Ground And DSM C341C-3, Circuit LPP06 (YE/BU), Harness Side
    Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
- Yes: Go to D3 .
- No: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.
D3 CHECK THE DSM HALL-EFFECT CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between DSM C341C-15, circuit RPP06 (GN), harness side and DSM C341C-3, circuit LPP06 (YE/BU), harness side.
  
  Fig 3: Measuring Resistance Between DSM C341C-15, Circuit RPP06 (GN) And DSM C341C-3, Circuit LPP06 (YE/BU)
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: Go to E4 .
- No: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.
D4 CHECK THE DSM HALL-EFFECT CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition ON.
- Measure the voltage between ground and:
  - DSM C341C-3, circuit LPP06 (YE/BU), harness side.
  - DSM C341C-15, circuit RPP06 (GN), harness side.
    
    Fig 4: Measuring Voltage Between Ground And DSM C341C-3, Circuit LPP06 (YE/BU), Harness Side
    Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes: REPAIR the affected circuit (s). CLEAR the DTCs. REPEAT the self-test.
- No: If DTC B1987 was retrieved, go to PINPOINT TEST B .
  For all other DTCs, INSTALL a new adjustable accelerator pedal assembly. Refer to ACCELERATION CONTROL SYSTEM . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.