For 1990-2009 cars

### 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 Low Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Input Speed Sensor Supply Voltage | P0716, P0717 | P0716, P0717 | P0716, P0717 | P0716
Input Speed Sensor Signal | P0716, P0717 | P0716, P0717 | P0716, P0717 | P0716

### Typical Scan Tool Data

#### ISS Signal

Circuit | Normal Range | Short to Ground | Open/High Resistance | Short to Voltage
--- | --- | --- | --- | ---
Operating Conditions: Engine running, normal operating temperature
ISS Signal | 450-7,000 RPM | 0 RPM | 0 RPM | 0 RPM
ISS/OSS Supply Voltage | -- | 0 RPM | 0 RPM | 0 RPM

#### ISS/OSS Supply Voltage

Circuit | Normal Range | Short to Ground | Open/High Resistance | Short to Voltage
--- | --- | --- | --- | ---
Operating Conditions: Key ON, Engine OFF or Engine running, normal operating temperature
ISS Signal | OK | OK | OK | OK
ISS/OSS Supply Voltage | OK | Out of range | Out of range | Out of range
8.3-9.3 Volts = OK Any other voltage = Out of range

### Circuit/System Description

The automatic transmission (AT) input and output speed sensor (ISS and OSS) assembly each are part of a single harness. The ISS is a hall-effect type sensor. The sensors mount to the control valve upper body assembly. The assembly connects to the control solenoid (w/body and TCM) valve assembly through a 3-wire harness and connector. The sensor end faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the input/output speed sensor (ISS/OSS) Supply Voltage circuit from the transmission control module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly 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

• | No ISS DTC P0716 active or have failed this key on.

• | No OSS DTCs P0722 or P0723.

• | The engine run time is greater than 5 seconds.

• | Engine torque is between 0-1492 N·m (0-1100 lb ft).

• | Ignition voltage is between 8.6-18.0 volts.

• | The vehicle speed is greater than 0 km/h (0 mph).

• | The calculated throttle position must be greater than 0 percent.

#### P0717

• | No ISS DTC P0717 active or have failed this key on.

• | Ignition voltage is between 8.6-18.0 volts.

• | The TCM must receive a valid torque signal from the ECM.

• | No OSS DTCs P0722 or P0723.

• | The vehicle speed is greater than 16 km/h (10 mph).

• | The engine torque is greater than 50 N·m (37 lb ft).

### Conditions for Setting the DTC

#### P0716

• | The TCM detects an unrealistic drop in input shaft speed.

• | ISS DTC P0716 is not failed this ignition.

• | Transmission input speed is 686 RPM or greater for 2 seconds.

• | Transmission input speed drops 653 RPM and does not recover within 0.80 seconds.

#### P0717

Transmission input shaft speed is less than 65 RPM for 4.5 seconds.

### Action Taken When the DTC Sets

• | P0716 and P0717 are Type A DTCs.

• | The TCM freezes transmission adaptive functions.

• | The TCM turns OFF all solenoids.

• | The TCM inhibits TU/TD functions.

### Conditions for Clearing the DTC

P0716 and P0717 are Type A DTCs.

### Diagnostic Aids

Inspect the ISS, harness, connector, and control solenoid (w/body and TCM) valve assembly pins for metallic debris and the 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.

### Reference Information

#### Schematic Reference

Automatic Transmission Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Description and Operation

Electronic Component Description

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Start the engine in Park and observe the transmission ISS on the scan tool while varying the engine speed. The transmission ISS should vary with the engine speed and not drop out.

### Circuit/System Testing

1. With the ignition ON, observe the transmission ISS/OSS supply voltage circuit status on the scan tool, the parameter should display OK. The ISS supply voltage should be 8.3-9.3 volts.

⇒ | If the circuit status does not display OK, disconnect the ISS/OSS connector from the control solenoid (w/body and TCM) valve assembly and recheck the scan tool display.

⇒ | If the transmission ISS/OSS supply voltage circuit status still displays OK, visually inspect the ISS, harness, connector, the control solenoid (w/body and TCM) valve assembly pins for metallic debris and 1-2-3-4 and 3-5-R clutch housing machined teeth surface for damage or misalignment. Repair or replace any damaged components.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test. The scan tool should display Transmission ISS between 100-400 RPM.

⇒ | If 100-400 ISS RPM is displayed, replace the ISS/OSS assembly.

⇒ | If no ISS RPM is displayed or the RPM is out of range, replace the control solenoid (w/body and TCM) valve assembly.

### Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Perform the Input and Output Speed Sensor Replacement.

• | Control solenoid (w/body and TCM) valve assembly - refer to Control Module References for replacement, setup, and programming.

• | Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

• | Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test.

• | Perform the Service Fast Learn Adapts if internal transmission repairs are performed.