P0723
DTC P0722 or P0723Diagnostic Instructions
- 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.
DTC Descriptors
DTC P0722
Output Speed Sensor Circuit No Signal
DTC P0723
Output Speed Sensor Circuit Intermittent
Diagnostic Fault Information
Typical Scan Tool Data
Transmission OSS
ISS/OSS Supply Voltage
Circuit/System Description
The output speed sensor (OSS) is a hall-effect type sensor. The sensor faces the front differential transfer drive gear. The sensor receives 8.3-9.3 volts on the 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.
Conditions for Running the DTC
P0722
- DTC P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, P0722, or P0723 is not set.
- The selected range is not PARK or NEUTRAL.
- The transmission input speed is 1,000 RPM or greater.
- The engine speed is 3,200 RPM or greater.
- The throttle position is 5 percent or greater.
- The throttle position signal is valid.
- The engine torque is 35 Nm (26 lb ft) or higher.
- The engine torque signal is valid.
- The TFT is -40° C (-40° F) or greater.
- The engine speed is 400 RPM or greater for 5 seconds.
- The ignition voltage is 8.6 volts or greater.
P0723
- DTC P0101, P0102, P0103, P0121, P0122, P0123, P0723, P0973, P0974, P0976, or P0977 is not set.
- Greater than 5 seconds since last range change.
- The engine speed is 400 RPM or greater for 5 seconds.
- The ignition voltage is 8.6 volts or greater.
Conditions for Setting the DTC
P0722
The transmission output speed is 70 RPM or less for 4.0 seconds.
P0723
- The transmission output speed is 105 RPM or greater for 0.2 second.
- The transmission output speed drops greater than 650 RPM and does not recover for 1.5 seconds.
Action Taken When the DTC Sets
- DTCs P0722 and P0723 are Type A DTCs.
- The TCM freezes transmission adaptive functions.
- The TCM turns the high side driver OFF.
- The TCM commands maximum line pressure.
- The TCM inhibits Tap Up/Down function.
- The TCM inhibits manual shifting of forward gears.
- The TCM limits the transmission to Reverse and 5th gear operation.
Conditions for Clearing the DIC/DTC
DTCs P0722 and P0723 are Type A DTCs.
Diagnostic Aids
- Damage or misalignment of the front differential transfer drive gear teeth surface or metallic debris on the face of the sensor may cause a speed sensor malfunction.
- Proper torque of the OSS mounting bolt is critical to proper OSS operation.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
- Component Connector End Views
- Inline Harness Connector End Views
Description and Operation
Electronic Component Description for OSS
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, verify with a scan tool the transmission ISS/OSS Supply Voltage parameter displays OK.
2. Operate the vehicle at 16-32 km/h (10-20 mph) while observing the scan tool Transmission OSS parameter. The Transmission OSS parameter should vary with the vehicle speed and not drop out.
3. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the conditions for running fault codes (DTC). You may also operate the vehicle within the conditions you observe from the freeze frame/failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
1. Note
You must perform the Circuit/System Verification first.
Ignition OFF, remove the control valve body cover.
2. Connect the vehicle wire harness X1 20-way transmission electrical connector to the Q8 control solenoid valve assembly.
3. Disconnect the B14A OSS harness connector X4 from the Q8 control solenoid valve assembly.
4. Ignition ON, test for 8.3-9.3 volts between the OSS voltage circuit terminal A X4 on the Q8 control solenoid valve assembly and ground at the transmission case.
5. If not within the specified range, replace the Q8 control solenoid valve assembly.
6. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test.
7. Inspect the front differential transfer drive gear teeth surface for damage or misalignment and for metallic debris on the face of the sensor. Repair or replace as necessary.
8. If all circuits test normal, replace the B14A output speed sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Note
Perform the Transmission Adaptive Values Learn following all transmission related repairs. Programming and Relearning
Output Speed Sensor Replacement
- Note
Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. Control Solenoid Valve and Transmission Control Module Assembly Inspection
Control Module References for control solenoid valve assembly replacement, setup, and programming