U0426/2: Immobilizer Error (System) - Yanmar 3TNV82A Troubleshooting Manual

FAILURE DIAGNOSIS

(3) U0426/2: Immobilizer Error (system)

DTC U0426/2
DTC Detecting Conditions
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
1. Key switch ON.
2. (1) Authorization by CAN communication is NG.
(2) Immobilizer CAN communication is faulty, and authorization by immobilizer
pulse communication is NG.
3. Four flashes followed by two flashes
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 starter does not rotate.
Recovery No.
Conditions
Remarks
Estimation of Failure cause/Error condition
• Unconformity of the immobilizer authorization key
Diagnosis Description
1) Initial diagnosis
with the diagnosis
tool
1-132
DTCs (Diagnostic Trouble Codes) General Description
• Check that the immobilizer authorization key is correct.
Immobilizer Error (system)
TNV DI Service Manual
Check points
Immobilizer
authorization key