Allison

Main code 62 indicates the retarder temperature sensor or circuitry is providing a signal outside the usable range of the ECU. Retarder temperature sensor failed low (?45?C; ?49?F) Main code 62 can be the result of a hardware failure or an actual extremely high or low temperature condition.

Main code 62 indicates the retarder temperature sensor or circuitry is providing a signal outside the usable range of the ECU. Retarder temperature sensor failed high (178?C; 352?F) Main code 62 can be the result of a hardware failure or an actual extremely high or low temperature condition. NOTE: A combination of codes 62 23, 33 23, and 21 23 indicates a problem with one of the branches of the common ground wire (wire 135) between the throttle and temperature sensors.

Code 63 00 is set when one of the two inputs for an input function Auxiliary Function Range Inhibit (Special) is in a different state (on or off) from the other input for longer than two minutes. When this condition is detected, Code 63 00 is set, the Service Indicator output is turned on. The transmission will not be inhibited in shifting from neutral to range. If Code 63 00 is set and the ECU was programmed after 9/26/94, the SERVICE icon on the shift selector will be illuminated.

Subcode 26 is set when this function (Kickdown) is selected by calibration, the calibration designated input is active but not failed, and throttle position is less than the calibration value defined. The kickdown shift schedule is inhibited when subcode 26 is active. The service indicator will be turned on if it is selected by the calibration. The kickdown shift schedule is not inhibited, the code is cleared and the service indicator will be turned off if the kickdown input remains inactive for the calibration time period while throttle position is less than the calibration value.

Subcode 40 is set when this function (Service Brake Status) is selected by calibration, and the specified input remains active for a calibration number of consecutive acceleration events. The service indicator will be turned on if it is selected by the calibration. A vehicle acceleration event is defined as an increase in transmission output speed from 1 rpm to a calibration value. The operation of the Automatic Neutral For Refuse Packer will be limited when this code is active. The active inhibit for this code is self-cleared and the service indicator will be turned off if the designated input for...