Accelerator Sensor - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

Accelerator sensor

Related DTC
P0122/4
DTC P0123/3
P0124/2
Work flow
*For details of the work, see after-mentioned "<Work Description>."For the operation of the
diagnosis tool, see "Diagnosis tool Operation Manual" separately.
Initial diagnosis with the diagnosis tool
A. Check the current
failure display
Current failure
exists.
B. Check the detected
value to estimate the
cause of failure.
Failure diagnosis flow
1. Check of sensor
resistance value
(sensor only)
OK
2. Sensor replacement
Check of sensor resistance value
(sensor + harness)
OK
4. Check of the
accelerator sensor output voltage
(when fit to sensor)
1-140
Method and Procedure of Failure Diagnosis
Accelerator Sensor Error (Low Voltage)
Accelerator Sensor Error (High Voltage)
Intermittent Failure with Accelerator Sensor
DTC in the failure history indication
[Check items]:
Accelerator sensor position (%) "Signal Data(SD)"
• SD ≤ 200 (0.2V)
• 200 (0.2V) < SD < 4600(4.6V)
• 4600 (4.6V) ≤ SD
NG
NG
3. Check the harness
continuity.
NG
OK
Check the failure
conditions.
Signal wire disconnected?
Normal
GND wire disconnected?
Replace the
sensor.
NG
Replace the
harness.
OK
Replace the ECU
or
sensor.
Replace the
E-ECU.
TNV DI Service Manual
017536-00E