Command Valve Header Lift Valve - Short Circuit To Ground (G.10.A.12.20 - G.30.B.53) - Case IH AFX8010 Repair Manual

Command valve Header lift valve - Short circuit to ground
(G.10.A.12.20 - G.30.B.53)
AFX8010
E0049-04 - Header Raise / Lower Current Sense
Context:
The Header Raise/Lower Current Sense circuit is the ground path for the header raise and header lower PWM
solenoids. By monitoring current flow on the return path of the solenoids, the module can provide precise control of
solenoid engagement. When this error message is reported, this is an indication that the output is engaged, but the
sense line does not detect any current flow - the circuit is grounded externally from the module.
Cause:
The header raise (L-11) or header lower (L-12) circuits are grounded at an external point.
Possible failure modes:
1. Bad solenoid.
2. Return side wiring shorted to ground.
3. Controller internal failure (internal regulator failure).
Solution:
1. Enter the Universal Display Plus "DIAG" screen. Select the "HDR HEIGHT/TILT" sort menu, and select
"RAISE VLV" or "LOWER VLV" to monitor the current flow. Use the "COMMAND" and "ENGAGE" functions to
power the circuit at 100% output. Test both header raise and lower circuits.
The proper current for both header raise and header lower should be approximately 1.0 - 1.5 amps. The fault
code is triggered by current flow greater than 3.3 amps.
A. If there is no current reading on either circuit, the circuit is grounded externally from the module.
Continue with Step 2.
B. If the readings are normal (1.0 - 1.5 amps), continue the troubleshooting at Step 4.
NOTE: If the current reading is high, immediately shut off the circuit after verifying the reading to prevent
module damage.
2. Turn the key switch to the OFF position and disconnect the main valves connector X022. Use a multimeter to
check for continuity between the header raise solenoid L-11 connector X022 pins 4 or 6 and chassis ground.
Repeat this continuity check between the header lower solenoid L-12 connector X022 pins 5 or 7 and chassis
ground. There should not be continuity to ground.
A. If there is continuity to ground on either solenoid, replace the solenoid.
B. If there is no continuity to ground on either solenoid, continue with Step 3.
3. Carefully disconnect connector X019 on the bottom of CCM1 module. Use a multimeter to check for continuity
between the harness end of connector X022 pin 6 and chassis ground. Repeat this continuity check between
the harness end of connector X022 pin 7 and chassis ground. There should not be continuity to ground.
A. If there is continuity to ground, there is a short to ground in the main frame (MF) harness between
connector X008 and connector X019 pin J2-20 wire 1117 black, 1118 black or 1114 black. Locate
the short and repair.
B.
If there is no continuity to ground, continue with Step 4.
4. Visually inspect the harness and connectors for damage, bent or dislocated pins, corroded terminals or
broken wires.
A.
If no damage is found, erase the error code and continue operation.
TOOL POSITIONING - LIFTING
9706 1 27/05/2004
G.10.A / 7