PAGE 62 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
ENGINE FAULT CODES
ENGINE FAULT CODES
Table 7. GCP ECU Fault Code List for ZPP 416 Engine (continued)
NO.
FAULT DESCRIPTION
TURNS ON MIL?
MIL FLASH CODE
78
Gasoline fuel pump relay control wire short to 12 V
Yes
629
79
Pin 85 (AUX_PWM4) open/short to GND
Yes
637
80
5V Reference #1 voltage low
Yes
642
81
5V reference #1 voltage high
Yes
643
82
MIL control ground short
Yes
644
83
MIL control short to power
No
645
84
Malfunction Indicator Lamp open
Yes
651
85
5V Reference #2 voltage low
Yes
652
86
5V Reference #2 voltage high
Yes
653
87
Power relay coil open
Yes
685
88
Power relay short to GND
Yes
686
89
Power relay short to 12V
Yes
687
90
Secondary fuel pressure low
Yes
1087
91
Secondary fuel pressure high
Yes
1088
92
NG Closed-loop: A/F is too lean
Yes
153
93
NG Closed-loop: A/F is too rich
Yes
159
94
LPG Adaptive-learn: A/F is too lean
Yes
161
95
LPG Adaptive-learn: A/F is too rich
Yes
162
96
NG Adaptive-learn: A/F is too lean
Yes
163
97
NG Adaptive-learn: A/F is too rich
Yes
164
98
EPR delivery pressure higher than expected
Yes
371
99
EPR delivery pressure lower than expected
Yes
372
100
EPR-ECU communications lost
Yes
173
101
EPR voltage supply high
Yes
174
102
EPR voltage supply low
Yes
175
103
EPR internal actuator fault detected
Yes
176
104
EPR internal circuitry fault detected
Yes
177
105
EPR internal communications fault detected
Yes
178
106
EPR secondary pressure higher than expected
Yes
1271
107
EPR secondary pressure lower than expected
Yes
1272
108
EPR secondary comm lost
Yes
1273
109
EPR secondary voltage supply high
Yes
1274
110
EPR secondary voltage supply low
Yes
1275
111
EPR secondary internal actuator fault
Yes
1276
112
EPR secondary internal circuitry fault
Yes
1277
113
EPR secondary internal comm fault
Yes
1278
114
Spark Plug or Coil Failure
Yes
1351
115
AUX 5V ANALOG INPUT 4 open or high
No
515
116
AUX 5V ANALOG INPUT 4 low
No
516