DIAGNOSTIC CODES
COMPONENT
CONDITION
SPN
FMI
Idle Air Control
Driver Circuit
Open/Grounded
634
5
Driver Circuit Short
to B+
634
3
Driver Circuit
Grounded
634
4
Position Out of
Range
634
7
Starter Enable
Circuit
Driver Circuit
Open/Grounded
1321
5
Driver Circuit Short
to B+
1321
3
Driver Circuit
Grounded
1321
4
Chassis Relay
Driver Circuit
Open/Grounded
520208
5
Driver Circuit Short
to B+
520208
3
Driver Circuit
Grounded
520208
4
All Wheel Drive
Control
Driver Circuit
Open/Grounded
520207
5
Driver Circuit Short
to B+
520207
3
Driver Circuit
Grounded
520207
4
System Power
Voltage Too High
168
3
Voltage Too Low
168
4
Throttle Safety
Signal
Voltage Too High
520194
3
Voltage Too Low
520194
4
Signal Out of
Range
520194
2
171