Yanmar 6LY3 series Service Manual page 361

Troubleshooting by DTC Fault Codes
12/05
DTC Fault Code
DTC / FMI
1. Key switch ON
2. ECU diagnosis shows an open or short condition of the advanced / retarded
P1220/7
timer output circuit.
P1225/7
3. —
4. PWR REDUCTION, CHECK ENGINE on the TELEFLEX display
Fail Mode
Limited Operation
Fail Release
Remarks
Fault
DTC / FMI
P1220/7
P1225/7
Troubleshooting Procedure
Check the injection timer solenoid and solenoid wire harness.
P1230/0, 1 (5V Sensor Voltage)
DTC
ECU Connector Pin Configuration
Figure 13-37
1
11
21
31
No. 24: +5V
No. 35: Sensor Ground
6LY3 Service Manual
1. Condition, 2. Fault, 3. Time to Detect, 4. Display
Engine cannot control the injection timer during an injection timer control failure code. The injection timing
will default to fully retarded.
Maximum engine speed is limited to 1800 rpm.
No
Require key off to reset fail mode
White smoke or black smoke may increase more than usual because of a failure code of the injection
timing control. This DTC is for open or short status of wire harness and timer solenoid. Timer device
malfunctions are logged by other DTC.
1. Timer actuator connector is disconnected
2. Timer actuator related wire harness open or short
P1230/0, 1
1 2 4
3
RA TARD TAAD AHR1 AHR2
11 12 13 14
G-P MNR RAR
STSW
21 22 23 24
CAMP
STR STHL SNS5
31 32 33 34
OUT1 OUT2 G_P1 G_P2
© 2007 Yanmar Marine International
Probable Cause
5V Sensor Voltage
5 6
CRK- CAM-
15 16
B1 CRK+ CAM+
25 26
B2 CANL PLO
35 36
G_S CANH THW
Figure 13-37
TROUBLESHOOTING
Wire harness
Timer solenoid
7 9 10
8
10
IGN2
ST STHS
17 18 19 20
20
NTS IGN1 EMS
27 28 29
30
30
THF RPS
STH
40
37 38 39
40
AN1 THLO PBST
0006139
Check Point
13-71