Facebook-f Twitter Github Bitbucket
Shop
Account
Cart $0.00
0
0
Subtotal: $0.00
No products in the cart.

Allison WTEC II Fault Code: 64 PID: SPN: 12 FMI: Retarder modulation request sensor, failed low

Main code 64 indicates the ECU has detected a voltage signal from the retarder request modulation sensor (consisting of a module and a retarder control device) in either the high or low error zone. These codes can be caused by faulty wiring, faulty connections to the resistance module or retarder control device, a faulty resistance module, a faulty retarder control device, or a faulty ECU. Power wire 133 and ground wire 135 for the retarder modulation request sensor share a common power and ground with the TPS and OLS devices. A short-to-ground on the common power wire causes a ?sensor failed low? code for the other devices (Codes 21 12, and 14 12). An open or a short-to-ground on retarder modulation request sensor signal wire 164 results in a Code 64 12 only.

Categories , , Tags , , , , , , , , , , , , , , ,
Facebook Twitter Youtube
Wiring Diagrams
Component Locators

Related products