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Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (15 - 24)
47 Chapter 4
TEST
CODE CONDITION FAULT CODE DEFINITION
15 C Power Interruption to computer memory or
EEC (PCM) Keep Alive Memory (KAM) test
failed
15 O Read Only Memory test failed
16 O (Cars ONLY): Signal from Ignition
Diagnostic Monitor (IDM) not received
16 R RPM too low to perform HEGO (HO2S) test
16 R Idle RPM high with ISC retracted
16 R RPM above self test limit with ISC off
17 R (Cars ONLY): RPM below self-test limit
17 R Idle RPM low with ISC retracted
17 R Idle RPM high with ISC retracted
18 R SPOUT circuit open or Spark Angle Word
(SAW) circuit failure
18 C Loss of tachometer input/IDM circuit
failure / SPOUT circuit grounded
19 O Failure in EEC (PCM) internal voltage
19 R (Cars ONLY): Erratic RPM signal at idle /
too low
19 C (Cars ONLY): Cylinder Identification (CID)
sensor failure
19 O Power processor check
21 O, R Cooling Temperature sensor out of specified
range or ECT out of range
22 O, R, C Manifold Absolute Pressure (MAP) or
BARO sensor out of range
23 O, R, C (Cars ONLY): Throttle Position (TP) sensor
signal out of range
23 O, R (Trucks ONLY): Throttle Position (TP)
sensor signal out of range
23 O, R Fuel injector pump lever sensor input is out
of self test range (Diesel)
24 O, R Intake Air Charge Temperature (ACT, IAT)
sensor or Vane Air Temperature (VAT)
sensor out of range
24 C Coil #1 primary circuit failure
4
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