4
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (312 - 416)
TEST
CODE
CONDITION
312
R
313
R
314
R
326
R, C
327
O, R, C
327
*
328
O, R, C
332
R, C
334
O, R, C
335
O
336
R, C
336
R, C
337
O, R, C
338
C
339
C
341
R
381
C
411
R
412
R
415
*
416
*
Chapter 4
FAULT CODE DEFINITION
Thermactor air system/fault during engine
run self-test
Thermactor air system/air not bypassed
during self-test
(Cars ONLY): Thermactor air system/fault
during engine run self-test / left side
(Cars ONLY): EGR sensor circuit voltage
lower than expected
EGR valve position circuit below minimum
voltage
EVP/EPT circuit below minimum voltage
EGR closed valve voltage lower than
expected
Insufficient EGR flow detected
EGR closed valve voltage high
EGR sensor circuit voltage higher or lower
than expected during self-test
EGR sensor circuit voltage higher than
expected
(Trucks ONLY): Exhaust pressure high
EGR sensor circuit above maximum voltage
(Cars ONLY): Engine Coolant temperature
(ECT) lower than expected
(Cars ONLY): Engine Coolant temperature
(ECT) higher than expected
(Cars ONLY): Octane adjust service pin
open
Erratic A/C compressor clutch cycling
Cannot control RPM during KOER low
RPM check
Cannot control RPM during KOER high
RPM check
Idle speed control system at minimum
learning limit
Idle air control system at maximum
learning limit
Retrieving Codes
60