DTC P0722, P0723, P077C, or P077D
Diagnostic InstructionsDTC Descriptor
DTC P0722

Output Speed Sensor Circuit No Signal

DTC P0723

Output Speed Sensor Circuit Intermittent

DTC P077C

Output Speed Sensor Circuit Low Voltage

DTC P077D

Output Speed Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

12 V Reference

P0722, P0723, P077C, P07BF

P0722, P0723, P077C

—

P0722, P0723

Signal

P077C

P077C

P0722, P0723, P077D

P0723

Typical Scan Tool Data

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions:Ignition=On

Parameter Normal Range:OK

12 V Reference

Out Of Range

OK

OK

Signal

OK

OK

OK

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions:Vehicle Speed=Greater than 2 km/h (1.2 MPH)

Parameter Normal Range:0 to 5,000 RPM

12 V Reference

0 RPM

0 RPM

—

Signal

0 RPM

0 RPM

0 RPM

Circuit/System Description

For an overview of the component/system, refer to:Electronic Component Description

Circuit

Description

12 V Reference

Regulated voltage supplied by the control module.

Signal

  • The control module input circuit has an internal resistance connected to ground.
  • The sensor produces a frequency modulated signal.

Component

Description

B14A Transmission Output Shaft Speed Sensor

The sensor contains a hall-effect sensor and additional electronics that processes the signal. It detects the change of strength of the magnetic field caused by the reluctor ring. When the strength changes, the sensor changes the amount of current it consumes. This results in a square wave signal of current and voltage. The control module detects the frequency in which the signal changes, which is proportional to the rotational speed.

K71 Transmission Control Module

The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation.

K71 is part of the component:Q8 Control Solenoid Valve Assembly

Park Gear

  • The reluctor ring has 23 teeth, magnetic segments, or indentations.
  • The following components rotate together:
    • Output Carrier Transfer Drive Gear Hub Assembly
    • Park Gear
Conditions for Running the DTCP0722
  • DTC P0101–P0103, P0121–P0123, P0716, P0717, P0723 = Not set
  • Accelerator Pedal Position=Greater than 8%
  • Accelerator pedal position signal = Valid
  • Engine Speed=400 to 7,500 RPM
  • Engine Torque Signal=Valid
  • Engine Torque=Greater than 30 Nm (22 lb ft)
  • Ignition Voltage=9 to 32 V
  • Powertrain Braking Signal=Valid
  • Transmission=ForwardorReverse
  • Transmission Fluid Temperature=Warmer than −40°C (−40°F)
  • Transmission Input Speed=1,000 to 8,192 RPM

Frequency the DTC runs=Continuously—After the running conditions are met—For greater than 5 s

P0723
  • DTC P0101–P0103, P0121–P0123, P0973, P0974, P0976, P0977 = Not set
  • Engine Speed=400 to 7,500 RPM
  • Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously—After the running conditions are met—For greater than 5 s

P077C, P077D
  • DTC P077C, P077D = Not set
  • Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously—After the running conditions are met

Conditions for Setting the DTCP0722

Transmission Output Speed=Less than 35 RPM—For greater than 4.5 s

P0723

Transmission Output Speed=Decreases greater than 800 RPM—For greater than 3 s

P077C

Output Speed Sensor—Signal circuit=Less than 0.25 V—For greater than 5 s

P077D

Output Speed Sensor—Signal circuit=Greater than 4.75 V—For greater than 5 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor category=Type A DTC—Additional actions taken:

  • Line Pressure Command=Maximum
  • Manual Shift Control=Disabled
  • Mode Switch=Disabled
  • Neutral Idle Mode=Disabled
  • Powertrain braking=Disabled
  • Tap UporTap Down=Disabled
  • TCC Control=Disabled
  • { P0722, P0723 }Torque Management=Active
  • Transmission Adaptive Pressure Control=Freeze current adapt values
  • Transmission gear allowed=Reverse&4th Gear
Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category=Type A DTC

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information ReferenceDTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Special Tools

DT-48616-10 - Adapter Harness

Equivalent regional tools:Special Tools

Circuit/System Verification
  1. Ignition » On / Vehicle » In Service Mode
  2. Verify the scan tool parameter:ISS/OSS Supply Voltage=OK
    • If not the specified state

      Refer to: Circuit/System Testing

    • If the specified state
    Raise and support the vehicle.

    Caution: Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.

  3. Start and idle the engine.
  4. Transmission in Drive
  5. Increase the engine speed slowly to 3,000 RPM and then back to idle.»Shift through all forward gears

    Verify the scan tool parameter:Transmission OSS=The value should change smoothly and gradually as the vehicle speed is increased and decreased.

    • If the value does not change smoothly and gradually

      Refer to: Circuit/System Testing

    • If the value changes smoothly and gradually
  6. 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.

    Verify the DTC does not set.

    • If the DTC sets

      Refer to: Circuit/System Testing

    • If the DTC is not set
  7. All OK.
Circuit/System Testing
  1. Ignition/Vehicle » Off
  2. Remove the component:Control Valve Body Cover
  3. Connect the electrical connector:X1@Q8 Control Solenoid Valve Assembly
  4. Disconnect the electrical connector:X4@Q8 Control Solenoid Valve Assembly—B14A Transmission Output Shaft Speed Sensor
  5. Ignition » On / Vehicle » In Service Mode
  6. Verify the scan tool parameter:ISS/OSS Supply Voltage=OK
    • If not the specified state
    1. Ignition/Vehicle » Off
    2. Disconnect the electrical connector:X3@Q8 Control Solenoid Valve Assembly—B14C Transmission Input Shaft Speed Sensor
    3. Verify the condition does not exist:Contamination with metallic debris@Electrical Connector—X3&X4
      • If a condition exists » Repair or replace as necessary
      • If no condition exists
    4. Ignition » On / Vehicle » In Service Mode
    5. Verify the scan tool parameter:ISS/OSS Supply Voltage=OK
      • If not the specified state»Replace the component:Q8 Control Solenoid Valve Assembly
      • If the specified state»Replace the component:B14C Transmission Input Shaft Speed Sensor
      • If the specified state
  7. Perform the following procedure/test:Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test

    Verify the procedure/test passes.

    • If the procedure/test does not pass

      Replace the component:Q8 Control Solenoid Valve Assembly

    • If the procedure/test passes
  8. Verify the condition does not exist:Park Gear—Damaged or misaligned reluctor ring.
    • If a condition exists

      Repair or replace as necessary

    • If no condition exists
  9. Test or replace the component:B14A Transmission Output Shaft Speed Sensor
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification