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P07BF




DTC P0716, P0717, P07BF, or P07C0

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 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





Typical Scan Tool Data









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 Nm (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 analog signal voltage is 0.25 volts or less for 4 seconds.

P070C

The transmission ISS analog 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.
* TCM inhibits manual up, manual down shifts with the shift selector.
* 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.
* TCM commands maximum line pressure.
* The TCM inhibits Tap-Up/Tap-Down functions.
* 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.
* TCM commands maximum line pressure.
* The TCM inhibits Tap-Up/Tap-Down functions.
* 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 (Electrical Diagrams)
Connector End View Reference

* Component Connector End Views (Connector End Views By Name)
* Inline Harness Connector End Views (Connector End Views By Number)

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 (Programming and Relearning)for scan tool information
Special Tools

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

For equivalent regional tools, refer to Special Tools (Tools and Equipment).

Circuit/System Verification

1. Ignition ON, verify with a scan tool the transmission ISS/OSS Supply Voltage test status parameter displays OK.
2. Engine idling 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 (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 solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement (Service and Repair).
2. Connect the DT-48616-10 - harness between the vehicle wire harness electrical connector, and the control solenoid valve assembly.
3. Ignition ON, verify 11-13 volts between the ISS voltage circuit terminal B on the control solenoid valve assembly and ground.

• If not within the specified range, replace the control solenoid valve assembly.

4. 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).
5. Inspect the reluctor for damage or misalignment. Repair or replace as necessary.
6. If all of the above test normal, replace the input speed sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

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

* Refer to Control Module References (Programming and Relearning) for control solenoid valve assembly replacement, setup, and programming.
* Perform the Transmission Adaptive Values Learn (Programming and Relearning) following all transmission related repairs.
* Perform the Input and Output Speed Sensor Removal (4. Input and Output Speed Sensor Removal) and the Input and Output Speed Sensor Installation (42. Input and Output Speed Sensor Installation).

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