Road Testing Vehicle

The Shift Point Road Test and Torque Converter Operation Test provide diagnostic information on transmission shift controls and torque converter operation.

Install a scan tool before proceeding to the road test. Use a scan tool to monitor transmission shift points.

• Verify that the correct program card is inserted in the scan tool.
• Connect J1962/16-way DLC cable adapter to the scan tool.
• Connect the DLC cable adapter securely into the vehicle DLC.
• Turn the ignition switch to the ON position, or start the vehicle if necessary.
• Select VEHICLE & ENGINE SELECTION menu.
• Select NEW VEHICLE YEAR & MODEL.
• Enter year, engine, or model with the appropriate qualifier, if needed (for example, transmission, 49 State or California).
• Select DIAGNOSTIC DATA LINK.
• Select PCM - POWERTRAIN CONTROL MODULE.
• Select the PID DATA MONITOR AND RECORD.
• Select VSS, TFT, TCC, TSS, SS1, SS2, SS3.

Monitor and record the selected PIDs. Compare the recorded results with the shift point charts; refer to Overdrive Range Shift Point Chart in Figure, Drive Range Shift Point Chart in Figure and Low Range Shift Point Chart in Figure.