3
CF65/75/85 series Automatic gearbox
DIAGNOSTICS
5-3
5.2 TABLE OF FAULT CODES
Main code Sub-code RECOMMENDED PROCEDURES
Electronic control unit (ECU) supply
13 12 Low
23 High
Check the following points:
a. Earth and positive battery cables connected, firmly attached and
clean.
b. Batteries are charged.
c. Vehicle loading system fails to load or loads too little or too much.
d. VIM fuse (Vehicle Interface Module).
e. VIM connections are firmly attached, clean and undamaged.
f. The correct wiring is used.
g. ECU connections are firmly attached, clean and undamaged.
If all points are in order, contact your Allison dealer.
Accelerator pedal sensor
21 12
23
Check the following points:
a. Accelerator pedal sensor connector is connected.
b. No interruptions or short circuits between wires or earth in wiring
harness to accelerator pedal sensor.
Replace the accelerator pedal sensor if necessary.
If all points are in order, contact your Allison dealer.
Speed sensors
22 14
15
16
Check the following points:
a. Connectors are firmly attached, clean and undamaged.
b. The speed sensor attachment bolt is tightened to the specified
torque.
c. No interruptions or short circuits between wires or earth in wiring
harness to sensor.
If all points are in order, contact your Allison dealer.
Selector keypad
23 12
13
14
15
23
24
Check the following points:
a. ECU connections - connectors are connected and clamped.
b. Selector keypad is connected and the wire loop has been cut
through.
c. No interruptions or short circuits between wires or earth in wiring
harness to selector.
Replace the selector if necessary.
If all points are in order, contact your Allison dealer.
1
ᓻ 200337
https://www.truck-manuals.net/
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