P0723
DTC P0722 or P0723
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P0722
-
Output Speed Sensor (OSS) Circuit Low Voltage
DTC P0723
-
Output Speed Sensor (OSS) Intermittent
Diagnostic Fault Information
Typical Scan Tool Data
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.
* Selected range is not PARK or NEUTRAL.
* Transmission input speed is 1,000 RPM or greater.
* Engine speed is 3,200 RPM or greater.
* Throttle position is 5 percent or greater.
* Throttle position signal is valid.
* Engine torque is 35 Nm (26 lb ft) or greater.
* Engine torque signal is valid.
* Transmission fluid temperature is -40°C (-40°F) or greater.
* Engine speed is 400 RPM or greater for 5 seconds.
* 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.
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 8.6 volts or greater.
Conditions for Setting the DTC
P0722
Transmission output speed is 70 RPM or less for 5 seconds.
P0723
* Transmission output speed is 210 RPM or greater for 0.2 second.
* 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.
* TCM freezes transmission adaptive functions.
* TCM turns the high side driver OFF.
* TCM commands maximum line pressure.
* TCM inhibits neutral idle.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
* 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 Electrical Diagrams
Connector End View Reference
* Component Connector End Views A/C Compressor Clutch
* Inline Harness Connector End Views X101
Description and Operation
Electronic Component Description Electronic Component Description for OSS
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References 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.
• If the parameter value displays Fault or Malfunction
Refer to Circuit/System Testing below.
• If the parameter value displays OK
2. Operate the vehicle at 16-32 km/h (10-20 mph). Verify with a scan tool the Transmission OSS parameter varies with the vehicle speed and there are no spikes or dropouts.
• If the parameter value does not vary with vehicle speed or has spikes or dropouts
Refer to Circuit/System Testing below,
• If the parameter value varies with vehicle speed and there are no spikes or dropouts
3. Perform the Road Test Initial Inspection and Diagnostic Overview. Verify DTC P0722 or P0723 did not reset.
• If DTC P0722 or P0723 set
Refer to Circuit/System Testing below.
• If DTC P0722 or P0723 did not set
4. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Note:
You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement Control Valve Body Cover Replacement.
2. Connect the vehicle wire harness X1 20-way transmission electrical connector to the Q8 control solenoid valve assembly.
3. Disconnect the B14A transmission output shaft speed sensor harness connector X4 from the Q8 control solenoid valve assembly.
4. Ignition ON.
5. Test for 8.3-9.3 volts between the OSS voltage circuit terminal A on the Q8 control solenoid valve assembly X4 connector and ground at the transmission case.
• If not between 8.3-9.3 volts
Replace the Q8 control solenoid valve assembly.
• If between 8.3-9.3 volts
6. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test.
• If the Q8 control solenoid valve assembly does not pass the Input Shaft Speed/Output Shaft Speed Input Test
Replace the Q8 control solenoid valve assembly.
• If the Q8 control solenoid valve assembly passes the Input Shaft Speed/Output Shaft Speed Input Test
7. Inspect the front differential transfer drive gear teeth surface for damage and misalignment with the B14A transmission output speed sensor, and for metallic debris on the face of the sensor.
• If the front differential transfer drive gear teeth are damaged, there is improper alignment, or metallic debris on the face of the sensor
Repair or replace as necessary.
• If the front differential transfer drive gear teeth are not damaged, alignment checks OK and no metallic debris is on the face of the sensor
8. Replace the B14A transmission output speed sensor.
Repair Instructions
Note:
* Perform the Reset Transmission Adapts Reset Transmission Adapts following all transmission related repairs.
* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Output Speed Sensor Replacement Output Speed Sensor Replacement
* Control Module References Control Module References for control solenoid valve assembly replacement, setup, and programming