Pinpoint Test A: No Communication With The Anti-Lock Brake System (Abs) Module

A1 CHECK CIRCUITS 601 (LB/PK), 534 (YE/LG) AND 483 (RD) 

• Key in OFF position.
• Disconnect: ABS Module C135.
• Connect EEC-IV 60-Pin Breakout Box.
• Key in ON position.
• Measure the voltage between EEC-IV 60-Pin Breakout Box pins and ground as follows:
  PIN AND CIRCUIT REFERENCE
  
  

  EEC-IV 60-Pin Breakout Box Pin	Circuit
  20	601 (LB/PK)
  25	483 (RD)
  9	534 (YE/LG)

  Fig 1: Measuring Voltage Between EEC-IV 60-PIN Breakout Box Pins And Ground

  Courtesy of FORD MOTOR CO.
• Are the voltages greater than 10 volts? 

Yes 

GO to A2.

No 

REPAIR the circuit(s) in question. TEST the system for normal operation.

A2 CHECK CIRCUIT 57 (BK) FOR AN OPEN 

• Key in OFF position.
• Measure the resistance between EEC-IV 60-Pin Breakout Box pin 8, circuit 57 (BK) and ground; and between EEC-IV 60-Pin Breakout Box pin 24, circuit 57 (BK) and ground.
  Fig 2: Measuring Resistance Between EEC-IV 60-Pin Breakout Box Pin 8, Circuit 57 And Ground

  Courtesy of FORD MOTOR CO.
• Are the resistances less than 5 ohms? 

Yes 

REFER to MODULE COMMUNICATIONS NETWORK .

No 

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.