Allison transmission fault codes

C Low voltage signal to the inclusion of retarder Off. Retarder is not included. C High voltage signal at the inclusion of retarder Off. Intermittent or low level signal The default value for.

The loss of one or more gears could be experienced depending on transmission condition. TR-P sensor circuit duty cycle low input. TR-P sensor signal frequency is out of normal range. TR-P sensor error detected. Engine may not crank. TFT out of range during onboard diagnostics. Transmission overtemp condition indicated.

Allison transmission fault codes

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Ignores the signal. U J data Off.

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To make work easier auto component makers have relied on the fault code system. These fault codes are supposed to cu the guesswork out of doing car repairs. The Allison fault code system uses 3 letters to identify the source and location of the problem. Those letters are C, P, and U. However, be careful of the instructions as they may throw the letter D in there as well. To learn these codes and how to read them, just continue to read our article. It has the information you want to know about so you can figure out your transmission issue faster than you could before the fault code system was implemented. Diagnostic Transmission Codes- D.

Allison transmission fault codes

Error code. Check trans. Control system response. Retarder trigger low voltage. Retarder does not turn on.

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TR-P sensor signal frequency is out of normal range. Engine may not crank. PF Auto determination of Off. Allison DOC 7. Gear ratio error. Circuit open or TCM drive failure during on-board diagnostics. P Output speed sensor no signal ON. Shift errors may also be due to other internal transmission concerns stuck valves, damaged friction material. Symptom No 5th or 6th gears. TR-P sensor circuit duty cycle low input. Only 1st, 2nd and 5th gears availabl e. Function disables the RELS. At Re5r05a At Re5r05a.

Access to Allison HUB is available to everyone. Likewise, Allison HUB provides approximately 1, Allison Authorized Distributors and Dealers worldwide additional resources that support the service of Allison transmissions. Allison also offers Allison HUB Premium, a subscription service, which is available to all global customers and provides premium Allison HUB access to official Allison service information, technical publications and literature.

No 2nd, 4th or 6th gears availabl e. What is Scribd? Includes and I-I transfer. TFT out of range during onboard diagnostics. P Incorrect gear ratio on the back of the transfer ON. Report this Document. Ignores the signal P High level signal from the current transfer. Carousel Next. Disables adaptation P Oil temperature too high Off. DNS, tries to include 6-n,. Retarder is not included. TCM detected a loss of intermediate shaft speed sensor signal during operation.