3
CF65/75/85 series Automatic gearbox
DIAGNOSTICS
5-7
Main code Sub-code RECOMMENDED PROCEDURES
Transmission ratio test on the gear to be changed from (during shifting).
51 01
10
12
21
23
45
65
Check the following points:
a. Output shaft engine speed sensor and rev sensor are connected.
The connectors are undamaged and clean.
b. No interruptions or short circuits between wires or earth in sensor
wiring.
c. Let the engine idle in neutral while the vehicle is on the brake.
Check the following points:
1. Specified dip stick.
2. Oil level.
If all points are in order, contact your Allison dealer.
Coupling 3 pressure switch fails to register pressure drop during shifting
52 01
08
32
34
54
56
71
78
79
99
Check the following points:
a. Output shaft engine speed sensor and rev sensor are connected.
The connectors are undamaged and clean.
b. No interruptions or short circuits between wires or earth in sensor
wiring.
c. Let the engine idle in neutral while the vehicle is on the brake.
Check the following points:
1. Specified dip stick.
2. Oil level.
d. Check that there is no interruption or short circuit between wires or
earth connection in the main wiring harness to the gearbox.
If all points are in order, contact your Allison dealer.
Engine and turbine rev test when engaging neutral
53 08
18
28
29
38
39
48
49
58
59
68
69
78
99
Check the following points:
a. Output shaft engine speed sensor and rev sensor are connected.
The connectors are undamaged and clean.
b. No interruptions or short circuits between wires or earth in sensor
wiring.
c. Let the engine idle in neutral while the vehicle is on the brake.
Check the following points:
1. Specified dip stick.
2. Oil level.
If all points are in order, contact your Allison dealer.
1
ᓻ 200337
https://www.truck-manuals.net/
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