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 Descriptor

DTC P0716: Input Speed Sensor Performance
DTC P0717: Input Speed Sensor Circuit No Signal

### Diagnostic Fault Information

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

### Typical Scan Tool Data

#### Transmission ISS

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

### Circuit/System Description

The input speed sensor (ISS) is a hall-effect type sensor. The ISS detects revolutions of the intermediate shaft's C2 drum. As the C2 drum rotates, the sensor produces a signal frequency based on the machined surface of the C2 drum. This signal is transmitted to the Transmission Control Module (TCM). The TCM uses the ISS signal in connection with the output speed sensor signal to control engine torque, shift timing, and lock-up.

### Conditions for Running the DTC

#### P0716

• | The ignition voltage is between 10.2 V and 15.5 V.

• | The engine speed is greater than 400 RPM for 2 s.

• | The transmission is not in emergency mode.

• | Driving in D range.

• | Current gear 2nd or higher.

• | TCM communication is normal.

• | Vehicle speed by ABS is greater than 30 km/h (19 MPH).

#### P0717

• | The ignition voltage is between 10.2 V and 15.5 V.

• | The engine speed is greater than 400 RPM for 2 seconds.

• | The transmission is not in emergency mode.

• | Driving in D range.

• | Current gear 2nd or higher.

• | TCM communication is normal.

• | Output speed multiplied with current gear ratio is more than 600 RPM

### Conditions for Setting the DTC

#### P0716

Deviation from calculated output speed is more than 15% for 1 s over 10 times.

#### P0717

• | No input speed sensor pulse while receiving pulses on the output speed sensor.

• | Deviation from calculated output speed is more than 300 RPM.

• | No input speed sensor pulse when vehicle speed from ABS is more than 20 km/h (13 MPH) for 300 ms.

### 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 allows the vehicle after a stop to operate only in the second gear and "R" range.

### Conditions for Clearing the DTC

• | P0716 and P0717 are Type A DTCs.

• | Output speed is greater than 300 RPM for more than 70 s.

• | Deviation from calculated output speed is less than 5% for more than 1 s.

### Diagnostic Aids

Damage or misalignment of the C2 drum machined teeth surface may cause a speed sensor malfunction.

### 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

Transmission Component and System Description

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References for scan tool information

### 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 you observed from the Freeze Frame/Failure Records data.

### Circuit/System Testing

#### Static Test

1. Ignition OFF, remove the K71 Transmission Control Module (TCM).
2. Test for more than 1 MΩ between the low reference circuit terminal 13 (X2) and the voltage supply circuit terminal 12 (X2).

⇒ | If less than the specified range, test the wiring harness for internal short. If the circuit tests normal, replace the automatic transmission.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 13 (X2) and also to the voltage supply circuit terminal 12 (X2).

⇒ | If less than the specified range, replace the wiring harness.

4. If all circuits test normal, test or replace the K71 Transmission Control Module (TCM). Verify the DTC does not reset.

⇒ | If the DTC resets, replace the automatic transmission.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Automatic transmission replacement, refer to Transmission Replacement

• | Control valve body, refer to Control Valve Body Replacement for replacement.

• | Wiring harness, refer to Automatic Transmission Wiring Harness Replacement for replacement

• | TCM, refer to Control Module References for replacement, setup and programming.

⇒ | Perform the Transmission Adaptive Functions.