E0174-03-Ccm2 Battery Voltage Shorted To High Source (A.50.A.91.82 - G.30.B.54) - New Holland CX720 Repair Manual

E0174-03-CCM2 Battery Voltage Shorted to High Source
(A.50.A.91.82 - G.30.B.54)
E0174-03 - CCM2 Battery Voltage Shorted to High Source
Cause:
The CCM2 Battery Voltage circuit is shorted to a higher than normal source.
Possible failure modes:
1. Circuit wiring is shorted to a high voltage source.
2. Faulty alternator/regulator.
3. Controller internal failure (internal regulator failure).
Solution:
1. Battery voltage is used as "keep alive memory" power in the module to retain settings and configuration infor-
mation.
A. The module will not initialize (wake-up at "key on") if battery voltage drops below 9 V, but there is no
shutdown for excessive voltage.
2. Enter InfoView monitor - "Diagnose info" screen.
Select "Supply" sub menu.
Select "CCM2 Battery Voltage" and check voltage range.
The proper voltage is 10.0 - 18.0 volts.
A. If the voltage reading is greater than 18 volts, continue with Step 2.
B. If the voltage reading is between 10 - 18 volts, go to Step 5.
3. Shut off the combine engine, and then turn the key switch on again. Enter the InfoView Monitor - "Diagnose
info" screen.
Select "Supply" sub menu.
Select "CCM1 Key switch Voltage" and check voltage range.
The acceptable voltage range for the module is 10 - 18 volts.
A. If the voltage reading is between 10 - 18 volts, the alternator and/or regulator has failed, and is producing
excessive voltage. Refer to Alternator - Testing (A.30.A.82 - G.40.A.20) for additional alternator testing
information.
B. If the voltage reading is greater than 18 volts, continue with Step 3.
4. Turn the key switch off to power down the system. Check the voltage at fuse F39 using a multi-meter.
A. If the voltage reading is greater than 18 volts , then the batteries have been mistakenly connected in
series (7.5L units), or there is a fault in the wiring of the 24 V starting system (Iveco units). Refer to
DISTRIBUTION SYSTEMS - Troubleshooting (A.80.A.90 - G.40.A.10) for additional information.
B. If the voltage reading is between 10 - 18 volts, continue with Step 4.
5. Remove the buddy seat and storage bin to gain access to connector X015 on CCM2. Check the voltage at
connector X015 pin J1-1.
A. If the voltage reading is greater than 18 volts, then a high voltage source has been connected to one of
the following wires in the cab main harness:
wire 047 red, fuse F39 to harness splice
wire 052 red, harness splice to CCM1 connector X018 pin J1-1
wire 049 red, harness splice to CCM3 connector X012 pin J1-1
wire 050 red, harness splice to CCM2 connector X015 pin J1-1
wire 051 red, harness splice through connector X001 pin 2 to RHM connector X026 pin 13
wire 057 red, harness splice to InfoView monitor connector X064 pin D
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
A.50.A / 105
2 4/7/2006