The debris has the potential to stick the 3-4 Shift Pressure or 3-4 Holding valves. The debris can be a very small sliver that is visibly unnoticable unless flushing onto a fine filter paper.
#Scanmaster elm abs bleed proceedure code#
With the scan tool, check environmental data for P1731.ĭid the environmental data show the code setting during a 3-4 upshift or 4-3 downshift?ĭebris may enter through the vents in the top of the valve body. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure
#Scanmaster elm abs bleed proceedure verification#
Perform NAG1 TRANSMISSION VERIFICATION TEST. Is the fluid level and condition correct?Ĭorrect the fluid level in accordance with the Service Information If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from either new or transmission service, a fluid level check is unnecessary.Ĭheck the transmission fluid level and condition in accordance with the Service Information. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level in accordance with the Service Information. Low fluid level can be the cause of many transmission problems. With the scan tool, check for other transmission DTCs.Īre there any transmission solenoid, speed sensor and/or any other transmission electrical related DTCs present? CHECK IF TRANSMISSION SOLENOID DTCS ARE PRESENT.Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.
INTERMITTENT STICKING VALVE IN THE VALVE BODYĪlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. TRANSMISSION SOLENOID, SPEED SENSOR AND/OR OTHER ELECTRICAL RELATED DTCS PRESENT During Downshift - actual (calculated) gear is greater than target (expected) gear.
During an Upshift - actual (calculated) gear is less than target (expected) gear. No shifting operation - actual (calculated) gear differs from the target (expected) gear, no plausible gear is calculated, actual (calculated) turbine speed is greater than 300 RPM or calculated transmission ratio is above threshold. No shifting operation and actual gear differs from the target gear. When this occurs, the transmission will remain in neutral until the vehicle slows to 29 Km/h (18 mph).Įngine RPM greater than 450 RPM, no N2 - N3 input speed sensor errors present, no gear selector lever errors present, no ABS system errors, and vehicle speed above 10 Km/h (6 mph). Placing the transmission in neutral prevents potential catastrophic failure. These codes indicate that the transmission experienced an unknown or incorrect gear ratio. The transmission control module is programmed to immediately place the transmission into neutral if P0730 or P1731 codes are set. The intent of this diagnostic is to detect if the transmission is trying to mechanically shift into a different gear than the TCM intends.
The Transmission Control Module (TCM) constantly calculates the transmission ratio based on the input speed sensor 1 and 2 (N2-N3) signals and the calculated output shaft speed.
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