• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
OSS Supply Voltage | P0722 | P0722 | -- | -- |
OSS Signal | P0722, P0723 | P0722, P0723 | P0722, P0723 | -- |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running, normal operating temperature Parameter Normal Range: 0-7,000 RPM | |||
ISS/OSS Supply Voltage (Pin B) | Out of Range | Out of Range | OK |
Transmission OSS (Pin C) | 0 RPM | 0 RPM | 0 RPM |
The output speed sensor (OSS) is a hall-effect type sensor. The sensor faces the output shaft machined teeth surface. The sensor receives 8.3-9.3 volts on the input/output speed sensor (ISS/OSS) supply voltage circuit from the transmission control module (TCM). As the output shaft rotates, the sensor produces a signal frequency based on the machined surface of the output shaft. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses the OSS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.
• | No ISS DTCs P0716 or P0717. |
• | No OSS DTC P0723. |
• | The selected range is not PARK or NEUTRAL. |
• | The vehicle speed is greater than 16 km/h (10 mph). |
• | The transmission input speed is between 1,000-6,500 RPM. |
• | The engine speed is between 3,000-5,000 RPM. |
• | The calc. throttle position is greater than 8 percent. |
• | The engine torque is greater than 50 N·m (37 lb ft). |
• | The TFT is greater than 0°C (32°F). |
• | The engine speed is greater than 500 RPM for 5 seconds. |
• | The ignition voltage is between 8.6 volts and 19.0 volts. |
• | No ISS DTCs P0716 or P0717. |
• | No OSS DTC P0722. |
• | Greater than 6 seconds since last range change. |
• | DTC P0723 has not passed this ignition cycle. |
• | The engine speed is greater than 500 RPM for 5 seconds. |
• | The ignition voltage is between 8.6 volts and 19.0 volts. |
The transmission output speed is 70 RPM or less for 4.5 seconds.
• | The transmission input speed does not change by more than 500 RPM for 2 seconds. |
• | The transmission output speed is 1,000 RPM or greater for 2 seconds. |
• | The transmission output speed drops 1,200 RPM for greater than 1.5 seconds and does not recover. |
• | DTCs P0722 and P0723 are Type A DTCs. |
• | The TCM freezes transmission adaptive functions. |
• | The TCM turns OFF all solenoids. |
DTCs P0722 and P0723 are Type A DTCs.
• | Damage or misalignment of the 3-5-R clutch piston housing machined teeth surface may cause a speed sensor malfunction. |
• | Proper torque of the OSS mounting bolt is critical to proper OSS operation. |
Automatic Transmission Controls Schematics
Electronic Component Description for output speed sensor (OSS)
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
J 38522 Variable Signal Generator
⇒ | If not within the specified range, replace the control solenoid (w/body and TCM) valve assembly. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Important: Perform the Service Fast Learn Adapts following all transmission related repairs. |
Important: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. |
• | Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming |