FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Chevy Truck >> 2013 >> Traverse AWD V6-3.6L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0723

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 Circuit No Signal

DTC P0723
- Output Speed Sensor Circuit Intermittent

Diagnostic Fault Information






Typical Scan Tool Data










Circuit/System Description

The automatic transmission output shaft speed (OSS) sensor 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 sensor 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 sensor signal circuit to the TCM. The TCM uses the OSS sensor signal to calculate output shaft speed to determine commanded 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, 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 % 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 400-7,500 RPM for 5 s.

* Ignition voltage is greater than 8.5 V.

P0723

* DTC P0101, P0102, P0103, P0121, P0122, P0123, P0973, P0974, P0976, or P0977 is not set.

* Greater than 5 s since last transmission upshift or downshift.

* Engine speed is 400-7,500 RPM for 5 s.

* Ignition voltage is greater than 8.5 V.

Conditions for Setting the DTC

P0722

Transmission output speed is 35 RPM or less for 4.0 s.

P0723

* Transmission output speed is 105 RPM or greater for 0.2 s.

* TCM detects the transmission output shaft speed dropped greater than 650 RPM for 1.5 s.

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 Tap Up/Down function.

* TCM inhibits manual shifting of forward gears.

* TCM limits the transmission to Reverse and 3rd or 5th gear operation.

Conditions for Clearing the 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.

* If the scan tool ISS/OSS Supply Voltage indicates out of range, the fault could also be caused by the transmission input shaft speed sensor.

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 X100

Description and Operation

* Transmission General Description Transmission General Description

* Transmission Component and System Description Transmission Component and System Description

* Electronic Component Description Electronic Component Description

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.

2. Verify the scan tool ISS/OSS Supply Voltage parameter displays OK.

• If OK is not displayed

Refer to Circuit/System Testing.

• If OK is displayed

3. Verify the scan tool Transmission OSS parameter changes with vehicle speed or does not drop out while operating the vehicle at 16-32 km/h (10-20 mph).

• If the Transmission OSS does not vary with vehicle speed or drops out
Refer to Circuit/System
Testing.

• If the Transmission OSS varies with vehicle speed and does not drop out

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

5. Verify the DTC does not set

• If the DTC sets
Refer to Circuit/System Testing.

• If the DTC does not set

6. All OK.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the control valve body cover.

2. Connect the vehicle wire harness electrical connector to the Q8 Control Solenoid Valve Assembly electrical connector.

3. Disconnect the B14A Transmission Output Shaft Speed Sensor wiring harness connector from the Q8 Control Solenoid Valve Assembly.

4. Ignition ON.

5. Test for 8.3-9.3 V between the OSS sensor supply voltage circuit terminal A at the Q8 Control Solenoid Valve Assembly, and ground at the transmission case.

• If not between 8.3-9.3 V

1. Ignition OFF, disconnect the B14C Transmission Input Shaft Speed Sensor wiring harness connector from the Q8 Control Solenoid Valve Assembly. Ignition ON.

2. Test for 8.3-9.3 V between the OSS sensor supply voltage circuit terminal A X4 electrical connector at the Q8 Control Solenoid Valve Assembly, and ground at the transmission case.

• If not between 8.3-9.3 V, replace the Q8 Control Solenoid Valve Assembly.

• If between 8.3-9.3 V, replace the B14C Transmission Input Shaft Speed Sensor.

• If between 8.3-9.3 V

6. Verify the scan tool Transmission OSS parameter is between 256-266 RPM when performing the output shaft speed test. Refer to 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 not between 256-266 RPM
Replace the Q8 Control Solenoid Valve Assembly.

• If between 256-266 RPM

7. Verify there is no damage to the front differential transfer drive gear teeth surface or misalignment with the B14A Transmission Output Shaft Speed Sensor.

• If the front differential transfer drive gear is damaged or is misaligned
Repair
or replace as necessary.

• If the front differential transfer drive gear is not damaged or misaligned.

8. Replace the B14A Transmission Output Shaft Speed Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repairs.

* Perform the Reset Transmission Adapts Reset Procedure following all transmission repairs.

* Control Valve Body Cover Replacement Control Valve Body Cover Replacement.

* Output Speed Sensor Replacement Output Speed Sensor Replacement

* Input Speed Sensor Replacement Input Speed Sensor Replacement

* Control Module References Control Module References for Control Solenoid Valve Assembly replacement, programming, and setup

pro multis Credits:Operation CHARM About Operation CHARM