New Holland WorkMaster 50 Service Manual page 789

DTC 163-02-Short circuit error of injector in cylinder 3
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the fuel injector power stages for a short circuit condition. If the ECU
A-9000 detects a short circuit condition in the injector number 3 Y-9003 circuit, this fault will occur.
Cause:
The ECU A-9000 has detected a short circuit in the fuel injector number 3 Y-9003 circuit.
Possible failure modes:
1. Faulty fuel injector number 3 Y-9003, wiring.
2. Faulty fuel injector number 3 Y-9003, internal failure.
3. Faulty ECU A-9000, software.
Solution:
1. Verify this fault code is still present and in an active state.
Use the Easy Engine software provided on the Electronic Service Tool (EST) to check the fault status and to
perform the cylinder cut-out test.
A. If the fault is still present and active, continue with Step 2.
B. If the fault is no longer present or is in an inactive state, the fault may be intermittent and not currently active.
Continue with Step 7.
2. Check the fuel injector number 3 Y-9003 internal resistance.
Disconnect the engine harness (EN) from the fuel injector number 3 Y-9003 at connector X-9031.
Use a multimeter to measure the resistance of fuel injector number 3 Y-9003 on the injector pins :
From
X-9031 pin 1
A. If there is between .03 - .05 Ω, leave connector X-9031 disconnected and continue to Step 3.
B. If the resistance is not between .03 - .05 Ω, fuel injector number 3 Y-9003 solenoid coil has failed. Replace
fuel injector number 3 Y-9003.
3. Check the fuel injector number 3 Y-9003 engine harness (EN) wiring for a short to a voltage source.
With the key in the OFF position, use a multimeter to perform the following voltage check on the engine harness
(EN) side :
From
X-9031 pin 1
X-9031 pin 2
With the key in the ON position, use a multimeter to perform the following voltage check on the engine harness
(EN) side :
From
X-9031 pin 1
X-9031 pin 2
A. If there is no voltage, leave connector X-9031 disconnected and continue to Step 4.
Electrical systems - FAULT CODES
To
X-9031 pin 2
To
Chassis ground
Chassis ground
To
Chassis ground
Chassis ground
47866583_ 02/12/2015
55.12 [55.DTC] / 68
Value
There should be between .03 - .05 Ω
Value
There should be no voltage.
There should be no voltage.
Value
There should be no voltage.
There should be no voltage.