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DTC P0722 or P0723

DTC P0722 or P0723

Diagnostic 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

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 -


Typical Scan Tool Data

Transmission OSS

Circuit Short to Ground Open/High Resistance Short to Voltage
Operating conditions: Engine running, normal operating temperature Parameter Normal Range: 0-7,000 RPM
OSS Supply Voltage 0 RPM 0 RPM -
Transmission OSS Signal 0 RPM 0 RPM 0 RPM


ISS/OSS Supply Voltage

Circuit Short to Ground Open/High Resistance Short to Voltage
Operating conditions: Key ON, Engine OFF or Engine running, normal operating temperature Parameter Normal Range: OK
Transmission OSS Signal OK OK OK
OSS Supply Voltage Out of Range OK Out of Range


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 volt via the OSS supply circuit from the transmission control module (TCM). When the output shaft rotates, the sensor creates a signal frequency that is based on the output shaft's machined surface. 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 you complete the steps described above, check the diagnostic trouble code is not reset by driving the vehicle according to the conditions for running diagnostic trouble codes (DTC). You can also drive the vehicle according to the conditions you see in 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. Refer to 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 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. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .

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

Note

Perform the Resetting of the transmission's adaption after all transmission repairs.

Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .


Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Output Speed Sensor Replacement

• Control Module References for control solenoid valve assembly replacement, setup, and programming