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