New Holland WorkMaster 50 Service Manual page 870

DTC 226-03-Battery voltage is higher than expected
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the battery voltage. If the ECU A-9000 detects a voltage higher than
expected, this fault will occur.
Cause:
The ECU A-9000 has detected a battery voltage of greater than 28.8 V.
Possible failure modes:
1. Faulty alternator, failed regulator.
2. Faulty ECU A-9000, software.
Solution:
1. Verify fault is present and active.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is present and active, continue with Step 2.
B. If the fault is no longer present or in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 3.
2. Start the engine and raise the Revolutions Per Minute (RPM) to approximately 1500 RPM for 1.00 min. Lower the
RPM to idle speed and check the battery voltage with the engine running.
With the engine running, use a multimeter to perform the following voltage check on the battery posts :
From
Battery +
A. If the voltage is high, out of range (normal engine running operating range is approximately 14.8 - 16.2 V, the
alternator has failed. Replace the alternator.
B. If the voltage is within range (normal engine running operating range is approximately 14.8 - 16.2 V, check the
ECU A-9000 for the appropriate software and re-flash, if necessary.
3. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Electrical systems - FAULT CODES
To
Battery -
47866583_ 02/12/2015
55.12 [55.DTC] / 149
Value
14.8 - 16.2 V