WITH PROGNOSTICS + WITHOUT OIL LEVEL SENSOR
11
Diagnostic Codes
To enter the diagnostic code function:
1. Bring the vehicle to a complete stop.
Apply the parking brake.
2. For a pushbutton shift selector, simultaneously
press the UP and DOWN arrows four times.
For a bump lever shift selector,
press the DIAGNOSTICS button four times.
3. Up to five codes may be recorded in memory.
4. Each code remains in the display until the MODE button is
pushed, then the next code is shown. Active codes are shown first,
newest to oldest, followed by any inactive codes still in the memory.
ACTIVE CODES: INACTIVE CODES:
For a detailed list of Diagnostic Transmission Codes for 5th Generation
Electronic Controls Shift Selectors, see pages 17 through 21.
To exit the diagnostic code function:
Any of the following methods may be used.
1. For a pushbutton shift selector, press the N (NEUTRAL)
range button.
2. For a bump lever shift selector, press the DIAGNOSTICS
range button until back to range display.
3. Wait approximately 10 minutes and the system will
automatically return to normal operating mode.
4. Turn off the vehicle engine ignition switch.
Drive the vehicle and check for code recurrence. If codes continue to
recur, bring the vehicle to an Allison Authorized Service Network to
diagnose and repair the problem causing the codes.
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