Overview:The Fuller Advantage transmission is equipped with an auto-neutral function. This function shifts the transmission to neutral when the vehicle is brought to a complete stop while the transmission is in gear and the park brake is set. Fault Code 21 indicates a problem with the Auto-Neutral Park Brake Switch circuit. Detection:The TECU has two options that can be configured depending on component setup. For a TECU configured for a Hard-Wired Park Brake Switch, this fault can be detected anytime the ignition key is on. For a TECU configured for a J1939 Park Brake Switch input, the fault can be...

Overview:The Fuller Advantage transmission is equipped with an auto-neutral function. This function shifts the transmission to neutral when the vehicle is brought to a complete stop while the transmission is in gear and the park brake is set. Fault Code 21 indicates a problem with the Auto-Neutral Park Brake Switch circuit. Detection:The TECU has two options that can be configured depending on component setup. For a TECU configured for a Hard-Wired Park Brake Switch, this fault can be detected anytime the ignition key is on. For a TECU configured for a J1939 Park Brake Switch input, the fault can be...

Overview:The Fuller Advantage transmission is equipped with Hill Start Aid (HSA) which prevents roll-back and roll-forward while launching on grades that are 1% and greater. The HSA holds for 3 seconds using vehicle foundation wheel brakes. The Transmission Electronic Control Unit (TECU) and ABS Module communicate over the J1939 Data Link and control the HSA function. Fault Code 22 sets if the TECU loses communication with the ABS or the ABS communicates that the HSA is not available. Detection:The TECU communicates with the ABS module over the J1939 Data Link. If communication is lost with the ABS module or the...

Overview:The Fuller Advantage transmission is equipped with Hill Start Aid (HSA) which prevents roll-back and roll-forward while launching on grades that are 1% and greater. The HSA holds for 3 seconds using vehicle foundation wheel brakes. The Transmission Electronic Control Unit (TECU) and ABS Module communicate over the J1939 Data Link and control the HSA function. Fault Code 22 sets if the TECU loses communication with the ABS or the ABS communicates that the HSA is not available. Detection:The TECU communicates with the ABS module over the J1939 Data Link. If communication is lost with the ABS module or the...

Overview:The Fuller Advantage transmission is equipped with Hill Start Aid (HSA) which prevents roll-back and roll-forward while launching on grades that are 1% and greater. The HSA holds for 3 seconds using vehicle foundation wheel brakes. The Transmission Electronic Control Unit (TECU) and ABS Module communicate over the J1939 Data Link and control the HSA function. Fault Code 22 sets if the TECU loses communication with the ABS or the ABS communicates that the HSA is not available. Detection:The TECU communicates with the ABS module over the J1939 Data Link. If communication is lost with the ABS module or the...