New Holland WorkMaster 50 Service Manual page 804

DTC 17E-02-Number of desired injections exceeds threshold
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the requested number of fuel injections. If the ECU A-9000 deter-
mines that the number of requested injections is greater than the current capability of the fuel injection system, this
fault will occur,
Cause:
The ECU A-9000 has determined that the number of requested fuel injections has exceeded the current capability of
the fuel injection system.
Possible failure modes:
1. Faulty battery, low voltage.
2. Faulty ECU A-9000 power supply.
3. Faulty ECU A-9000, software.
Solution:
1. Check battery voltage.
Load test the battery. There should be approximately 12.0 V.
A. If the battery passes the load test, continue to Step 2.
B. If the battery fails the load test, the battery has failed. Replace the battery.
2. Check the ECU A-9000 voltage supply wiring.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
Place a jumper wire between X-9102 pin K28 and chassis ground. This will energize the main relay K-9102.
Use a multimeter to perform the following voltage checks on the engine harness (EN) side :
From
X-9102 pin K01
X-9102 pin K03
X-9102 pin K05
A. If there is not approximately 12.0 V, there is a faulty ECU A-9000 voltage supply. Use the appropriate service
manual, if necessary, to locate and repair the failed conductor.
B. If there is approximately 12.0 V, continue to Step 3.
3. Check the ECU A-9000 for the appropriate software and re-flash, if necessary.
A. If the fault has been resolved, return the machine to service.
B. If the fault has not been resolved, escalate an ASIST concern.
Wiring harnesses - Electrical schematic sheet 01 – Power distribution and glow plugs (engine schematics)
(55.100.DP-C.20.E.01)
Wiring harnesses - Electrical schematic sheet 02 – Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
Electrical systems - FAULT CODES
To
X-9102 pin K02
X-9102 pin K04
X-9102 pin K06
47866583_ 02/12/2015
55.12 [55.DTC] / 83
Value
There should be approximately
12.0 V.
There should be approximately
12.0 V.
There should be approximately
12.0 V.