Shut-Off Path Mes1, Shorted To Low Source - New Holland CX720 Repair Manual

0440.4-SHUT-OFF PATH MES1, SHORTED TO LOW SOURCE

(SERVICE TOOL FAULT CODE 161) (B.20.A.92 - G.30.B.53)
CX840
0440.4 - SHUT-OFF PATH MES1, SHORTED TO LOW SOURCE (SERVICE TOOL FAULT CODE 161)
Context:
Engine Disabled - fuel pump shut off
Cause:
Internal fault within either the fuel injection pump or engine ECU
Possible failure modes:
1. Faulty fuel injection pump assembly
2. Faulty engine ECU
Solution:
1. Remove the fuel injection pump and have it tested at an authorised Bosch fuel injection agent.
NOTE : Prior to replacing the fuel injection pump inspect the connector to the pump and ensure the fit is good
and that there is no pin damage within the connector.
A. If the pump is confirmed as faulty by the authorised Bosch agent then replace the pump assembly.
B. If the pump is okay continue with step 2.
2. If the pump is okay or a new pump is installed and the fault still exists it is likely that the engine ECU is faulty.
NOTE : Prior to replacing the Engine ECU inspect the connectors to the ECU and ensure the fit is good and that
there is no pin damage within the connectors.
A. Reload the engine software into the ECU using the Electronic Service Tool. Attempt to operate the engine.
If the engine runs without producing further faults continue with vehicle operation.
B. If the ECU will not accept software or still does not allow engine operation replace the engine ECU.
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
2 4/7/2006
B.20.A / 170