vauxhall Workshop Repair Guides

Vauxhall Workshop Service and Repair Manuals

ABOUT US
DTC P0722, P0723, P077C, or P077D > < Torque Converter Diagnosis

Astra J

DTC P0716, P0717, P07BF, or P07C0

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 P0716:  Input Speed Sensor Performance

DTC P0717:  Input Speed Sensor Circuit No Signal

DTC P07BF:  Input Speed Sensor Circuit Low Voltage

DTC P07C0:  Input Speed Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Input Speed Sensor Supply Voltage

P0716, P0717, P07BF

P0716, P0717, P07BF

P0716, P0717

P0716

Input Speed Sensor Signal

P0716, P0717

P0716, P0717, P07BF

P0716, P0717, P07C0

P0716

Typical Scan Tool Data

Transmission ISS

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Operating Conditions: Engine running, normal operating temperature, transmission in PARK

Parameter Normal Range: 500-5,800 RPM

Input Speed Sensor Supply Voltage

0 RPM

0 RPM

0 RPM

Input Speed Sensor 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

Input Speed Sensor Signal

OK

OK

OK

Input Speed Sensor Supply Voltage

Out of Range

Out of Range

Out of Range

Circuit/System Description

The input speed sensor (ISS) is a hall-effect type sensor. The ISS mounts to the inside of the automatic transmission case assembly and connects to the control solenoid valve assembly through a 2-wire harness and connector. The sensor faces the reluctor wheel which is attached to the 4-5-6 clutch and 3-5-R clutch housing assembly. The sensor receives battery voltage on the input speed sensor ISS Supply Voltage circuit from the transmission control module (TCM). As the 4-5-6 clutch and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the teeth of the reluctor wheel. This signal is transmitted through the ISS signal circuit to the TCM. The TCM uses the ISS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

Conditions for Running the DTC

P0716

    •  DTC P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, P0752, P0973, or P0974 is not set.
    •  Vehicle speed is 10 km/h (6 mph) or greater.
    •  The engine speed is greater than 400 RPM for 5 seconds.
    •  The ignition voltage is 9.0 volts or greater.
    •  The engine torque signal is valid.
    •  Throttle position signal is valid.

P0717

    •  DTC P0717 is not set.
    •  The engine speed is greater than 400 RPM for 5 seconds.
    •  The ignition voltage is 9.0 volts or greater.
    •  The vehicle speed is 16 km/h (10 mph) or greater.
    •  The engine torque is 50 N·m (37 lb ft) or greater.

P07BF or P070C

The ignition voltage is 9.0 volts or greater.

Conditions for Setting the DTC

P0716

Transmission input speed drops 1,350 RPM for greater than 1 second and does not recover.

P0717

Transmission input shaft speed is less than 50 RPM for 5 seconds when output speed is detected.

P07BF

The transmission ISS analogue signal voltage is 0.25 volts or less for 4 seconds.

P070C

The transmission ISS analogue signal voltage is 4.75 volts or greater for 4 seconds.

Action Taken When the DTC Sets

P0716

    •  DTC P0716 is a Type A DTC.
    •  The TCM freezes transmission adaptive functions.
    •  The TCM forces TCC OFF.
    •  The TCM inhibits Tap-Up/Tap-Down functions.
    •  The TCM inhibits manual up, manual down shifts with the shift selector.
    •  The TCM commands maximum line pressure.
    •  The TCM enables torque management.
    •  The TCM limits the transmission to reverse and 5th gear.
    •  The TCM commands the high side driver off.

P0717

    •  DTC P0717 is a Type A DTC.
    •  The TCM freezes transmission adaptive functions.
    •  The TCM forces TCC OFF.
    •  The TCM commands maximum line pressure.
    •  The TCM inhibits Tap-Up/Tap-Down functions.
    •  The TCM inhibits manual up, manual down shifts with the shift selector.
    •  The TCM limits the transmission to reverse and 2nd gear.

P07BF or P070C

    •  DTCs P07BF and P070C are Type A DTCs.
    •  The TCM freezes transmission adaptive functions.
    •  The TCM commands maximum line pressure.
    •  The TCM inhibits Tap-Up/Tap-Down functions.
    •  The TCM inhibits manual up, manual down shifts with the shift selector.
    •  The TCM limits the transmission to reverse and 4th gear.

Conditions for Clearing the DTC

DTCs P0716, P0717, P07BF, and P070C are Type A DTCs.

Diagnostic Aids

Inspect the ISS harness and connector for metallic debris and the reluctor wheel for damage or misalignment.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference



Description and Operation



Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

    •  DT-48616-10 Adapter Harness
    •  EL 38522 Variable Signal Generator


For equivalent regional tools, refer to Special Tools .

Circuit/System Verification

  1. Ignition ON, verify with a scan tool the transmission ISS/OSS Supply Voltage test status parameter displays OK.
  2. Engine ticking over in PARK, observe the scan tool Transmission ISS parameter while varying the engine speed. The Transmission ISS parameter should change with the engine 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 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 .

Circuit/System Testing

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

  1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .
  2. Connect the DT-48616-10 harness between the vehicle wire harness X1 14-way transmission electrical connector, and the Q8 control solenoid valve assembly.
  3. Ignition ON, test for 11-13 volts between the ISS voltage circuit terminal B X3 on the control solenoid valve assembly and ground.
    4. ⇒ If not within the specified range, replace the Q8 control solenoid valve assembly.
  4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test .
  5. Inspect the reluctor for damage or misalignment. Repair or replace as necessary.
  6. If all of the above test normal, replace the B14C input speed sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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


    •  Refer to Control Module References for control solenoid valve assembly replacement, set-up, and programming.
    •  Perform the Transmission Adaptive Values Learn following all transmission related repairs.

DTC P0722, P0723, P077C, or P077D > < Torque Converter Diagnosis