Test Steps Description

X1 - CHECK BATTERY VOLTAGE
X2 - CHECK BATTERY GROUND
X3 - GROUND FAULT ISOLATION
X4 - PROCESSOR GROUND FAULT ISOLATION
X5 - CHECK SIG RTN CIRCUIT CONTINUITY
X6 - MEASURE VOLTAGE AND GROUND TO IRCM
X7 - CHECK KEY POWER TO IRCM
X8 - CHECK VPWR CIRCUIT CONTINUITY
X9 - MEASURE CONTINUITY OF POWER GROUND TO IRCM
X11 - CHECK POWER-TO-PUMP(S) CIRCUIT VOLTAGE
X12 - CHECK POWER-TO-PUMP(S) CIRCUIT CONTINUITY
X13 - CHECK POWER TO IRCM
X14 - CHECK POWER-TO-PUMP(S) CIRCUIT FOR SHORTS TO POWER
X15 - SERVICE CODE 87/83: CHECK CONTINUITY OF FUEL PUMP CIRCUIT
X16 - CHECK APPROPRIATE FUEL PUMP CIRCUIT FOR SHORTS TO POWER AND GROUND
X17 - CHECK FUEL PUMP RELAY COIL RESISTANCE
X18 - NO HIGH OR LOW FAN
X19 - CHECK FAN MOTOR OPERATION CHECK FAN MOTOR OPERATION
X20 - CHECK FAN MOTOR OPERATION CHECK FAN MOTOR OPERATION
X21 - MEASURE BATTERY VOLTAGE SUPPLY AT FAN-BYPASSING INTEGRATED CONTROLLER
X22 - VERIFY COOLING FAN GROUND
X23 - MEASURE BATTERY VOLTAGE SUPPLY AT FAN-BYPASSING IRCM
X25 - CHECK FAN RUNNING MODE (LOW)
X26 - JUMPER HIGH ELECTRIC-DRIVE SIGNAL (HEDF) TO GROUND
X27 - CHECK ECT SENSOR
X30 - SERVICE CODE 83/563 CHECK HEDF RELAY RESISTANCE
X31 - CHECK HEDF CIRCUIT CONTINUITY
X32 - CHECK HEDF CIRCUIT FOR SHORTS TO GROUND
X33 - CHECK HEDF CIRCUIT FOR SHORTS TO POWER
X35 - LOW SPEED FAN ALWAYS ON: CHECK EDF CIRCUIT CONTINUITY
X36 - CHECK EDF CIRCUIT FOR SHORT TO POWER
X37 - EDF CIRCUIT FAULT ISOLATION
X40 - CHECK FAN VOLTAGE
X41 - CHECK FAN MOTOR
X42 - CHECK FAN RUNNING MODE
X43 - MEASURE BATTERY VOLTAGE SUPPLY AT FAN-BYPASSING INTEGRATED CONTROLLER
X44 - CHECK EDF CIRCUIT FOR SHORT TO GROUND
X45 - VERIFY COOLING FAN GROUND
X46 - CHECK ECT SENSOR
X50 - CHECK FOR VOLTAGE AT A/C CLUTCH
X51 - CHECK FOR CONTINUITY FROM INTEGRATED CONTROLLER TO A/C CLUTCH
X52 - ENTER OUTPUT STATE CHECK (REFER TO QUICK TEST APPENDIX)
X53 - CHECK WAC OUTPUT FOR PROPER ELECTRICAL OPERATION
X54 - CHECK FOR VOLTAGE AT A/C CLUTCH SWITCH
X55 - CHECK CONTINUITY OF ACCS TO INTEGRATED CONTROLLER
X56 - CHECK CONTINUITY OF ACCS CIRCUIT
X57 - CHECK CONTINUITY IN WAC TO INTEGRATED CONTROLLER CIRCUIT
X58 - CHECK WAC CIRCUIT FOR SHORTS TO GROUND
X59 - CHECK WAC CIRCUIT FOR SHORTS TO POWER
X60 - CHECK FOR VOLTAGE AT A/C CLUTCH
X80 - SERVICE CODE 88: CHECK EDF PROCESSOR SIGNAL TO INTEGRATED CONTROLLER FOR SHORTS TO GROUND
X81 - CHECK FAN RUNNING MODE
X82 - FAN ALWAYS ON WITH 88: CHECK EDF PROCESSOR SIGNAL TO INTEGRATED CONTROLLER FOR OPEN CIRCUIT
X83 - CHECK EDF CIRCUIT FOR SHORTS TO POWER
X84 - CHECK EDF SHORT TO GROUND
X90 - SERVICE CODE 95: CHECK INERTIA SWITCH
X91 - VERIFY THAT FUEL PUMP IS OFF
X92 - CHECK FOR FUEL PUMP RELAY ALWAYS CLOSED
X93 - CHECK CONTINUITY OF FPM CIRCUIT
X94 - CHECK FOR CONTINUITY BETWEEN FPM CIRCUIT AND GROUND
X95 - SERVICE CODE 59 OR 96: CHECK CONTINUITY OF POWER-TO-PUMP CIRCUIT
X96 - VERIFY FUEL PUMP OPERATION
X100 - CONTINUOUS MEMORY CODE 95: CHECK EEC-IV HARNESS
X101 - CHECK FPM CIRCUIT
X102 - CONTINUOUS MEMORY CODE 59 OR 96 CHECK FOR CONTINUOUS MEMORY CODE 83 OR 87
X103 - CHECK EEC-IV HARNESS
X104 - CONTINUOUS MEMORY CODE 83 OR 87: CHECK EEC-IV HARNESS