TRANSMISSION AND TORQUE CONVERTER CD3340B/YB4411
7-16
Published 04/07/2015 Control # 569-00
Electrical Troubleshooting Chart
Problem Possible Cause Remedy
No drive at engine start up.
1. Blown ECU fuse.
2. ECU connector loose.
1. Check ECU fuse (also check fuse to shift
lever.)
2. Check that connector is mating correctly with
ECU.
No drive and continuous
warning buzzer.
1. Attempting to select drive with
parking brake engaged.
1. Release the parking brake.
No drive.
1. Faulty shift control.
2. Parking brake sticking.
3. Faulty transmission harness.
1. Check control and wiring.
2. Check parking brake assembly.
3. Check harness continuity and connector.
Missing gears.
1. Faulty solenoid(s).
2. Faulty shift control.
3. Low oil pressures.
1. Check solenoid(s) and wiring.
2. Check control and wiring.
3. Check clutch pack and mainline pressures.
No 4th gear.
1. Faulty speed signal. 1. Check speed sensor and wiring.
2. Check speed sensor installation (i.e.
distance from transfer case).
Down speed protection
does not seem to be
working.
1. Faulty speed signal. 1. Check speed sensor and wiring.
Will not downshift and
repeating double beep
sounded
1. Speed too high for selected
downshift.
1. Slow machine with brakes. Deselect
downshift.
Lower gear than lever
selected.
1. Kickdown engaged. 1. Check kickdown switch and wiring.
Kickdown will not engage
and double beep sounded.
1. Speed too high to engage lower
gear.
1. Slow machine and try to engage kickdown
again.
Kickdown not operating. 1. Faulty kickdown input. 1. Check kickdown switch and wiring.
Machine will not perform a
reversal of direction and
repeating double beep
sounded.
1. Speed too high for reversal of
direction.
1. Slow machine with brakes.
2. Deselect reversal.
Sporadic gear changes.
1. Moisture in ECU connectors. 1. Check that connector seals are installed and
are in good cond
ition.
Reference Only
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