22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 17 FMI: Oncoming ratio test (after shift), 1 to R Main code 54 indicates a failed oncoming ratio test. 1?R shift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 21 FMI: Oncoming ratio test (after shift), 2 to 1 Main code 54 indicates a failed oncoming ratio test. 2?1 downshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 23 FMI: Oncoming ratio test (after shift), 2 to 3 Main code 54 indicates a failed oncoming ratio test. 2?3 upshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 24 FMI: Oncoming ratio test (during shift), 2 to 4 Main code 54 indicates a failed oncoming ratio test. 2?4 upshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 27 FMI: Oncoming ratio test (after shift), 2 to R Main code 54 indicates a failed oncoming ratio test. 2?R shift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 32 FMI: Oncoming ratio test (after shift), 3 to 2 Main code 54 indicates a failed oncoming ratio test. 3?2 downshift The ratio test after a shift is failed when...