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Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (536 - 568)
Chapter 4 62
TEST
CODE CONDITION FAULT CODE DEFINITION
536 R, C Brake On/Off (BOO) circuit not activated
during KOER
538 R Insufficient RPM change during KOER
Dynamic Response Test/
538 R (Trucks ONLY): invalid cylinder balance
test due to throttle movement during test
539 O A/C on/Defrost on during KOEO
542 O, C Fuel pump secondary circuit fault
543 O, C Fuel pump secondary circuit fault
551 O Idle Air Control solenoid circuit fault
552 O Thermactor air bypass solenoid circuit fault
552 * Air management circuit 1 failure
553 O Thermactor air diverter solenoid circuit
fault
553 * Air management circuit 2 failure
554 O (Cars ONLY): Fuel Pressure Regulator
Control (FPRC) circuit failure
554 * Fuel pressure regulator control circuit
failure
555 * Supercharger bypass solenoid circuit
failure
556 O, C Fuel pump relay primary circuit fault
557 O, C Fuel pump primary circuit failure
558 O EGR valve regulator solenoid circuit fault
559 O (Cars ONLY): Air conditioning ON relay
circuit failure
562 * Auxiliary electric fan circuit failure
563 O (Cars ONLY): High Speed Electro Drive
Fan circuit fault
564 O (Cars ONLY): Electro Drive Fan circuit
fault
565 O Canister purge solenoid circuit fault
566 O 3-4 shift solenoid circuit failure
567 * Speed control vent circuit failure
568 * Speed control vacuum circuit failure
4
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