P1234/2: Intermittent Failure With Start Assist Relay - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

(3) P1234/2: Intermittent Failure with Start Assist Relay

DTC P1234/2
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
1. Engine running.
2. Unconfirmed error detected 10 times.
3: Does not 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.
• Wiring defect of the harness
The start assist relay wiring may be disconnected or short-circuited with POWER SUPPLY.
•
• The E-ECU internal circuitry may be faulty.
1-76
DTCs (Diagnostic Trouble Codes) General Description
Intermittent Failure with Start Assist Relay
Check points
Connector
Harness
Start Assist Relay
E-ECU
TNV DI Service Manual