Spare Speed Sensor (Option); P1340/4: Failure With Spare Speed Sensor - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

Spare speed sensor (option)

(1) P1340/4: Failure with Spare Speed Sensor

DTC P1340/4
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
1. Engine running.
2. Spare speed sensor signal below 0[min
3. One flash followed by another flash.
Movement at Error occurrence
Error Mode [Run As Is]:
After detecting the error, the system lets
the engine continue to run without any
restrictions.
Run restricted? No.
Recovery No.
Conditions
Remarks
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Output pulse voltage defect by low engine speed
• Output pulse defect by the battery over-charge
• Wiring defect of the harness
The spare speed sensor's signal wires may be disconnected or short-circuited with GND.
•
The alternator's terminals B and IG may be disconnected or short-circuited with GND.
•
• Output pulse defect by the alternator failure
• The E-ECU internal circuitry may be faulty.
1-62
DTCs (Diagnostic Trouble Codes) General Description
Failure with Spare Speed Sensor
-1
].
Main speed sensor error detection
Unavailable
Connector
Harness
alternator
E-ECU
Available
[Stop Immediately]:
The engine stops running.
Yes: The rack actuator relay is turned
OFF, and the rack position is forcibly
set to the engine stop position.
Yes:Key switch START
TNV DI Service Manual
Check points