P1601/2, P0605/12, P1605/2, P1606/2, P1620/12: Ecu Internal Errors - Yanmar 3TNV82A Troubleshooting Manual

DTCs (Diagnostic Trouble Codes) General Description

(2) P1601/2, P0605/12, P1605/2, P1606/2, P1620/12: ECU internal errors (2)

P1601/2
P0605/12
DTC P1605/2
P1606/2
P1620/12
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
1. Key switch ON.
2. E-ECU detects an error of the internal circuit.
3. Four flashes followed by one flash.
Movement at Error occurrence
Error Mode [Stop Immediately]:
The engine does not start up.
Run restricted? Yes: The rack actuator relay is turned OFF, and the rack position is forcibly set to the
Recovery No.
Conditions
Remarks
Estimation of Failure cause/Error condition
• ROM data error of E-ECU
Checksum error of EEPROM initial individual information
•
Checksum error of control application, map data or initial individual information in FlashROM
•
* Checksum A: control application, checksum B: map data, checksum C: initial individual information
Unconformity of the map data format
•
Diagnosis Description
1) Initial diagnosis
with the diagnosis
tool
TNV DI Service Manual
engine stop position.
• Check the fault indication.
• Rewrite the E-ECU software.
• Turn the key switch on/off to check the fault indication again.
*For details of the method and the procedure of diagnosis, see P.1-197
EEPROM error (Checksum)
FlashROM error (Checksum A)
FlashROM error (Checksum B)
FlashROM error (Checksum C)
Map format error
FAILURE DIAGNOSIS
Check points
E-ECU
1-123