22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 53 FMI: Oncoming ratio test (during shift), 5 to 3 Main code 54 indicates a failed oncoming ratio test. 5?3 downshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 54 FMI: Oncoming ratio test (after shift), 5 to 4 Main code 54 indicates a failed oncoming ratio test. 5?4 downshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 56 FMI: Oncoming ratio test (after shift), 5 to 6 Main code 54 indicates a failed oncoming ratio test. 5?6 upshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 64 FMI: Oncoming ratio test (after shift), 6 to 4 Main code 54 indicates a failed oncoming ratio test. 6?4 downshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 65 FMI: Oncoming ratio test (after shift), 6 to 5 Main code 54 indicates a failed oncoming ratio test. 6?5 downshift The ratio test after a shift is failed when...
22 March, 2025 Allison WTEC II Fault Code: 54 PID: SPN: 70 FMI: Oncoming ratio test (after shift), R to L Main code 54 indicates a failed oncoming ratio test. R?L shift The ratio test after a shift is failed when...