New Holland WorkMaster 50 Service Manual page 853

DTC 1E7-03-ECU 5 volt sensor supply 2 out of range
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 provides three independent five volt sensor supplies. The ECU A-9000 mon-
itors each sensor supply voltage to ensure they operate within a given range. If the ECU A-9000 determines that the
voltage for sensor supply 2 is out of range, this fault will occur.
The ECU A-9000 pin numbers associated with sensor supply 2 are K12, K13, K14, K15, and K16.
Cause:
The ECU A-9000 has determined that the sensor supply 2 voltage is out of range.
Possible failure modes:
1. Faulty battery voltage.
2. Faulty ECU A-9000 supply voltage.
3. Faulty ECU A-9000 sensor supply 2 pins.
4. Faulty ECU A-9000 connector X-9102, corrosion or damage.
5. 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 6.
2. Check the battery voltage.
Charge the battery, then, perform a load test on the battery.
A. If the battery passes the load test, continue to Step 3.
B. If the battery fails the load test, the battery has failed. Replace the battery.
3. Check the ECU A-9000 supply voltage.
Disconnect the ECU A-9000 connector X-9102.
Place a jumper wire between X-9102 pin K28 and chassis ground. This will energize the main relay K-9102.
With the key in the ON position, use a multimeter to perform the following voltage check on the vehicle harness
(VE) side :
From
X-9102 pin K03
X-9102 pin K05
X-9102 pin K01
A. If there is approximately 12 V, leave the ECU A-9000 connector X-9102 disconnected and continue to Step 4.
B. If there is not approximately 12 V, there is a failure in the ECU A-9000 supply wiring. Use the appropriate
service manual, if necessary, to locate and repair the failed conductor.
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] / 132
Value
There should be approximately 12 V.
There should be approximately 12 V.
There should be approximately 12 V.