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 | Short to Ground | Open/High Resistance | Short to Voltage
--- | --- | --- | ---
Operating Conditions: Engine running, normal operating temperature Parameter Normal Range: 500-5,800 RPM
ISS/OSS Supply Voltage | Out of Range | Out of Range | Out of Range
ISS Signal | 0 RPM | 0 RPM | 0 RPM

### Circuit/System Description

The input speed sensor (ISS) is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and TCM) valve assembly through a 2-wire harness and connector. The sensor 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 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

• | No ISS DTC P0717.

• | No OSS DTCs P0722 or P0723.

• | The engine speed is greater than 500 RPM for 5 seconds.

• | The ignition voltage is between 9.0 volts and 19.0 volts.

• | DTC P0716 has not passed this ignition cycle.

#### P0717

• | No OSS DTCs P0722 or P0723.

• | The engine speed is greater than 500 RPM for 5 seconds.

• | The ignition voltage is between 8.6 volts and 19.0 volts.

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

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

• | DTC P0717 has not passed this ignition cycle.

### Conditions for Setting the DTC

#### P0716

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

• | Transmission input speed drops 1,350 RPM for greater than 0.8 seconds and does not recover.

#### P0717

Transmission input shaft speed is less than 50 RPM for 4.5 seconds when output speed is detected.

### 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 Tap-Up/Tap-Down 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 3-5-R clutch housing machined teeth surface for damage or misalignment.

### Reference Information

#### Schematic Reference

Automatic Transmission Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

• | Transmission General Description

• | Transmission Component and System Description

• | Electronic Component Description

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | 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. Engine idling, 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.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

### Circuit/System Testing

1. Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Removal in Control Valve Body Assembly Removal.
2. Connect the DT-48616-10 harness .
3. Disconnect the ISS from the control solenoid (w/body and TCM) valve assembly.
4. Connect the EL-38522 generator between the high and low signal terminals of the control solenoid (w/body and TCM) valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test for further instructions.
5. Set the EL-38522 generator Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50.
6. Ignition ON, observe the scan tool Transmission ISS parameter. The scan tool Transmission ISS parameter should be between 100-400 RPM.

⇒ | If not within the specified range, replace the control solenoid (w/body and TCM) valve assembly.

7. If all circuits test normal, test or replace the 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 (w/body and TCM) valve assembly replacement, setup, and programming.

• | Perform the Service Fast Learn Adapts following all transmission related repairs.

• | Perform the Input and Output Speed Sensor Removal and the Input and Output Speed Sensor Installation.