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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
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