New Holland WorkMaster 50 Service Manual page 903

DTC 2E1-02-Starter relay low side driver circuit open
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 controls the starter control relay K-9104 using a low side and high side driver.
If the ECU A-9000 detects an open circuit in the high side driver circuit, this fault will occur.
Cause:
The ECU A-9000 has detected an open circuit in the starter control relay K-9104 high side driver circuit.
Possible failure modes:
1. Faulty starter control relay K-9104 wiring, open circuit.
2. Faulty starter control relay K-9104, internal failure.
3. 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 4.
2. Check the starter control relay K-9104 coil for an internal failure.
Remove the starter control relay K-9104.
Use a multimeter to measure the relay coil resistance on the starter control relay K-9104 pins :
From
X-9120 pin 85
A. If there is approximately 70 - 130 Ω, leave the starter control relay K-9104 disconnected and continue to Step
3.
B. If there is not approximately 70 - 130 Ω, the relay has failed. Replace the starter control relay K-9104.
3. Check the starter control relay K-9104 vehicle harness (VE) wiring for an open circuit.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9102.
With the key in the OFF position, use a multimeter to perform the following continuity check for an open circuit on
the vehicle harness (VE) side :
From
X-9120 pin 86
X-9120 pin 85
NOTE: Wiggle the harness during the check to promote an intermittent electrical connection.
A. If there is no continuity, there is an open circuit in the starter control relay K-9104 wiring in the vehicle harness
(VE). Use the appropriate service manual, if necessary, to locate and repair the broken conductor.
B. If there is continuity, check the ECU A-9000 for the appropriate service manual and re-flash, if necessary.
Electrical systems - FAULT CODES
To
X-9120 pin 86
To
X-9102 pin K53
X-9102 pin K27
47866583_ 02/12/2015
55.12 [55.DTC] / 182
Value
There should be approximately 70 -
130 Ω.
Value
There should be continuity.
There should be continuity.