Retrieving codes – Equus 3145 - Digital Ford Code Reader (1981 - 1995) User Manual
Page 64
Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (452 - 533)
61
Chapter 4
TEST
CODE
CONDITION
FAULT CODE DEFINITION
452
R
(Cars ONLY): Vehicle Speed Sensor (VSS)
signal fault
452
C
(Trucks ONLY): Vehicle Speed Sensor
(VSS) signal fault
453
*
Servo leaking down during test
454
*
Servo leaking up during test
455
*
Insufficient RPM increase during speed
456
*
Insufficient RPM decrease during test
457
*
Speed control command switches circuit
not functioning
458
*
Speed control command switches stuck or
circuit control
459
*
Speed control ground circuit open
511
O
Read Only Memory (ROM) test failure
512
C
Keep Alive Memory (KAM) test failure
513
C
PCM internal voltage failure
519
O
Power Steering Pressure Switch circuit
open
521
R
Power Steering Pressure Switch circuit
fault
522
O
Vehicle not in Park or Neutral during
KOEO
524
O, C
(Cars ONLY): Low speed fuel pump circuit
open - battery to ECA
525
O
(Cars ONLY): Vehicle was in gear or A/C
on during self-test
526
O
(Cars ONLY): Neutral Pressure Switch
NPS (PNP) circuit closed; A/C on
527
O
(Cars ONLY): Neutral Drive Switch NDS
(PNP) circuit open; A/C on
528
C
Clutch switch circuit fault
529
C
(Cars ONLY): Data communications link
or EEC circuit fault
532
*
Cluster control assembly circuit failure
533
C
(Cars ONLY): Data communications link
or EIC circuit fault
4