Yanmar 4BY - Page 274

TROUBLESHOOTING
BY Service Manual
13-13
After Troubleshooting or Repair
AFTER TROUBLESHOOTING OR REPAIR
The engine control unit (ECU) may have generated
trouble codes due to the current fault or during
troubleshooting. Remember to check and clear any
trouble codes after repairs are complete.
P0653
Sensor Supply
Monitoring 3
Short circuit reduce yes alarm
P0670
Glow Plug Control
Module
Failure, short circuit, over-current yes yes alarm
P0671
Glow System - Glow
Spark No. 1
Not connected, short circuit yes yes alarm
P0672
Glow System - Glow
Spark No. 2
Not connected, short circuit yes yes alarm
P0673
Glow System - Glow
Spark No. 3
Not connected, short circuit yes yes alarm
P0674
Glow System - Glow
Spark No. 4
Not connected, short circuit yes yes alarm
P0675
Glow System - Glow
Spark No. 5
Not connected, short circuit yes yes alarm
P0676
Glow System - Glow
Spark No. 6
Not connected, short circuit yes yes alarm
P0689 Main Relay Power relay sense short circuit low no no alarm
P0690 Main Relay Power relay sense short circuit high no no alarm
P2049
4BY - Injector Bank 1
6BY - Injector Bank 1
Short circuit on high side to Ground / B+
Short circuit on high side to Ground / B+
no
reduce
no
no
alarm
P2052
4BY - Injector Bank 2
6BY - Injector Bank 2
Short circuit on high side to Ground / B+
Short circuit on high side to Ground / B+
reduce
reduce
yes
yes
alarm
P2227
Atmospheric
Pressure
Plausibility check with BPS (boost pressure sensor) fail yes yes alarm
P2228
Atmospheric
Pressure
Short circuit low yes yes alarm
P2229
Atmospheric
Pressure
Short circuit high yes yes alarm
P2614
Camshaft Speed
Sensor
No connection / short circuit reduce yes alarm
P2617
Crankshaft Speed
Sensor
No connection / short circuit no no alarm
U0001 CAN Throttle Signal No signal idle yes alarm
U0426 Immobilizer Manipulation error no no alarm
* Relative value is the value read on a pressure gauge attached to the intake pipe.
** Absolute is the value reported by the ECU and displayed at the helm digital display.
Code Fail Mode
Run or
Condition
Engine
Can
Start
Check
Engine
Alarm