Pgm-Fi Self-Diagnosis Malfunction Indicator Failure Codes - Honda GL1800 Service Manual

PGM-FI SELF-DIAGNOSIS MALFUNCTION INDICATOR FAILURE
CODES
• The PGM-FI malfunction indicator lamp (MIL) denotes the failure codes (the number of blinks from 0 to 41). The MIL has
two types of blinks, a long blink and short blink. The long blink lasts for 1.3 seconds, the short blink lasts for 0.5
seconds. When a long blink occurs, that counts for 10 blinks of the MIL. The short blink counts for one MIL blink.
Therefore, if the MIL blinks two long blinks, and one short blink, that problem code is 21 (two long blinks = 20 blinks,
one short blink = 1 blink). Then, go to the flow chart and see problem code 21.
• When the Engine Control Module (ECM) stores some failure codes, the MIL shows the failure codes in the order from
the lowest number to highest number. For example, when the MIL blinks once, then blinks seven times, two failures
have occurred. Follow the flow charts for failure codes 1 and 7.
Number of MIL
blinks
• Open circuit in the power input and
• Faulty bank angle sensor
• Open circuit in bank angle sensor related
No
• Faulty FI IGN relay
blinks
• Open circuit in FI IGN relay related wires
• Faulty engine stop switch
• Open circuit in engine stop switch related
• Faulty ECM
• Blown FI IGN fuse (20 A)
0
• Blown ST. KILL fuse (10 A)
• Open circuit in MIL wire
• Faulty combination meter
• Faulty ECM
No
blinks
• Short circuit in service check connector
• Short circuit in MIL wire
• Faulty ECM
Stays lit
• Loose or poorly connected MAP sensor
• Open or short circuit in MAP sensor wire
1
• Faulty MAP sensor
Blinks
• Loose or poorly connected ECT sensor
• Open or short circuit in ECT sensor wire
7
• Faulty ECT sensor
Blinks
• Loose or poorly connected TP sensor
• Open or short circuit in TP sensor wire
8
• Faulty TP sensor
Blinks
• Loose or poorly connected IAT sensor
• Open or short circuit in TP sensor wire
9
• Faulty IAT sensor
Blinks
• Loose or poorly connected BARO sensor
• Open or short circuit in BARO sensor wire
10 • Faulty BARO sensor
Blinks
Cause
ground wires of the ECM
wires
wires
wire
connector
connector
connector
connector
connector
FUEL SYSTEM (Programmed Fuel Injection)
Symptoms
(Fail-safe contents)
• Engine does not start
• Engine operates normally
• Engine operates normally
• Engine operates normally
• Hard to start at a low temper-
ature (ECM controls using
preset value; coolant temper-
ature: 85° C/185° F)
• Poor engine response when
operating the throttle quickly
(ECM controls using preset
value; throttle opening: 0° )
• Engine operates normally
(ECM controls using preset
value; intake air temperature:
28° C/82° F)
• Engine operates normally at
low altitude
• Engine idles roughly at a high
altitude
(ECM controls using preset
value; barometric pressure:
760 mm Hg/1,013 hPa)
Refer to
page
5-71
5-12
–
5-16
5-18
5-19
5-22
5-23
5-13