Actuator Related Failures - Yanmar 3TNV82A Troubleshooting Manual

Method and Procedure of Failure Diagnosis

Actuator Related Failures

Rack actuator
Related DTC
P1212/4
DTC P1213/3
P1211/7
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.
[Check items]: Fault Code
Failure diagnosis flow
1. Check of rack
actuator coil resistance
(actuator only)
2. Check of rack
actuator coil resistance
(actuator + harness)
OK
4. Check of rack actuator
movement
TNV DI Service Manual
Failure with Rack Actuator (Low Voltage)
Failure with Rack Actuator (High Voltage)
Rack Actuator Mechanical Failure
DTC in the failure history indication
NG
NG
3. Check the harness
continuity.
NG
OK
FAILURE DIAGNOSIS
Check the failure
conditions.
Replace the
sensor.
NG
Replace the
harness.
OK
Replace the E-ECU
or
fuel injection pump.
Replace the E-ECU.
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