Related Dtc; Analog Input Related Failures - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

Analog Input Related Failures

Rack position sensor

Related DTC

P1202/4
DTC
P1203/3
Work flow
*For details of the work, see after-mentioned "<Diagnosis 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. Input voltage check
of the rack position sensor
(harness + E-ECU)
OK
3. Execution of
directive rack position control
(use diagnosis tool)
1-136
Method and Procedure of Failure Diagnosis
Rack Position Sensor Error (Low Voltage)
Rack Position Sensor Error (High Voltage)
DTC in the failure history indication
[Check items]:
Rack position sensor voltage (AD value) - "Signal Data (SD)"
• SD=0 (0V) or equivalent
• SD=5000 (5.0V) or equivalent
NG
2. Check the harness
NG
OK
Signal wire disconnected ?
Sensor GND wire disconnected ?
NG
continuity.
OK
Replace the
fuel injection pump.
TNV DI Service Manual
Check the failure
conditions.
Replace the
harness.
Replace the
E-ECU.
017534-00E