New Holland WorkMaster 50 Service Manual page 739

DTC 133-04-Intake manifold temperature sensor voltage is lower
than expected
Control Module : ECU
Context:
The Engine Control Unit (ECU) A-9000 monitors the intake manifold temperature sensor B-9001 signal circuit. If
the ECU A-9000 determines that the intake manifold temperature sensor B-9001 signal circuit voltage is less than
266.40 mV, this fault will occur.
Cause:
The ECU A-9000 has determined that the intake manifold temperature sensor B-9001 signal circuit voltage is less
than 266.40 mV.
Possible failure modes:
1. Faulty intake manifold temperature sensor B-9001 wiring, short to ground condition.
2. Faulty intake manifold temperature sensor B-9001, 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 5.
2. Check the intake manifold temperature sensor B-9001 engine harness (EN) wiring.
Disconnect the engine harness (EN) from the intake manifold temperature sensor B-9001 at connector X-9003.
With the key in the OFF position, use a multimeter to perform the following continuity check on the engine harness
(EN) side :
From
X-9003 pin 2
X-9003 pin 2
A. If there is continuity, there is a short to ground condition in the intake manifold temperature sensor B-9001 in
the engine harness (EN) wiring. Locate and repair the shorted conductor.
B. If there no continuity, leave connector X-9003 disconnected and continue to Step 3.
3. Check the intake manifold temperature sensor B-9001 engine harness (EN) wiring.
Disconnect the vehicle harness (VE) from the ECU A-9000 at connector X-9001.
With the key in the OFF position, use a multimeter to perform the following continuity check on the engine harness
(EN) side :
From
X-9001 pin A55
A. If there is continuity, there is a short circuit in the intake manifold temperature sensor B-9001 in the engine har-
ness (EN) wiring. Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there no continuity, leave connector X-9003 disconnected and continue to Step 4.
Electrical systems - FAULT CODES
To
X-9003 pin 1
Chassis ground
To
All pins in connector X-9001
47866583_ 02/12/2015
55.12 [55.DTC] / 18
Value
There should be no continuity.
There should be no continuity.
Value
There should be no continuity.