P0123/3: Accelerator Sensor Error (High Voltage) - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

(2) P0123/3: Accelerator Sensor Error (High Voltage)

DTC P0123/3
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s);
3 - Flashing pattern of failure indicator
1. Key switch ON.
2. Sensor voltage 4.6 [V] or higher.
3. Five flashes.
Movement at Error occurrence
Error Mode [Run Under Restrictions]:
The engine runs at a constant rotational
speed.
Run restricted? Yes: The target speed is set to the "on-
Recovery Yes: This error will be automatically reset
Conditions
Remarks
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Wiring defect of the harness
The SENSOR GND wire may be disconnected.
•
The sensor signal wire may be short-circuited with POWER SUPPLY.
•
• The accelerator sensor may be faulty.
Sensor output defect by a short circuit with power supply of the accelerator sensor inner wiring
•
• The E-ECU internal circuitry may be faulty.
1-14
DTCs (Diagnostic Trouble Codes) General Description
Spare Accelerator Sensor Function
Unavailable
error target speed (standard value:
-1
1500[min ])" or "pre-error target
speed".
when a normal voltage (0.2 to
4.6[V]) is input.
Accelerator Sensor Error (High Voltage)
Harness
Accelerator sensor
[Stop Immediately]:
The engine continues to run using the
spare accelerator sensor instead.
No.
Yes: This error will be automatically reset
when a normal voltage (0.2 to
4.6[V]) is input.
TNV DI Service Manual
Check points
Available