Chevrolet Trax: 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

Typical Scan Tool Data

Transmission ISS

ISS/OSS Supply Voltage

Circuit/System Description

The input shaft speed (ISS) sensor is a hall-effect type sensor. The ISS sensor 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 a 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 ISS sensor 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 sensor signal circuit to the TCM. The TCM uses the ISS sensor signal to calculate input shaft speed to determine commanded 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.
• Engine speed is 400-7,500 RPM for 5 s.
• Ignition voltage is 9-32 V.
• Engine torque signal is valid.
• Throttle position signal is valid.
• DTC runs continuously when above conditions are met.

P0717

• DTC P0717, P0722, or P0723 is not set.
• Engine speed is 400-7,500 RPM for 5 s.
• Ignition voltage is 9-32 V.
• Vehicle speed is 16 km/h (10 mph) or greater.
• Engine torque is 50 N.m (37 lb ft) or greater.
• DTC runs continuously when above conditions are met.

P07BF or P07C0

• Ignition voltage is 9-32 V.
• DTC runs continuously when above condition is met.

Conditions for Setting the DTC

P0716

TCM detects the transmission input shaft speed signal dropped greater than 1,350 RPM for 1 s.

P0717 - Condition 1

TCM detects the transmission input shaft speed signal is less than 33 RPM for 5 s.

P0717 - Condition 2

The TCM detects that P0722 set and the Transmission input speed is less than 1,000 RPM for 5 s.

P07BF

Transmission ISS sensor analog signal voltage is 0.25 V or less for 4 s.

P07C0

Transmission ISS sensor analog signal voltage is 4.75 volts or greater for 4 s.

Action Taken When the DTC Sets

• P0716, P0717, P07BF, and P07C0 are Type A DTCs.
• TCM freezes transmission adaptive functions.
• TCM forces TCC OFF.
• TCM inhibits Tap-Up/Tap-Down functions.
• TCM inhibits manual up, manual down shifts with the shift selector.
• TCM commands maximum line pressure.
• TCM enables torque management.
• TCM limits the transmission to reverse and 4th gear.
• TCM commands the high side driver off - P0716 only.

Conditions for Clearing the DTC

P0716, P0717, P07BF, and P07C0 are Type A DTCs.

Diagnostic Aids

• Inspect the ISS sensor harness and connector for metallic debris and the reluctor wheel for damage or misalignment.
• If the scan tool ISS/OSS Supply Voltage indicates out of range, the fault could also be caused by the transmission output shaft speed sensor.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (Encore, MH8 or MHB) , Automatic Transmission Controls Schematics (Trax, MH8 or MHB)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

• Inline Harness Connector End Views (Encore) , Inline Harness Connector End Views (Trax)

Description and Operation

• Electronic Component Description
• Transmission Component and System Description
• Transmission General 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 (LUV) , Powertrain Diagnostic Trouble Code (DTC) Type Definitions (2H0)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

DT-48616-10 Adapter Harness

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification

1. Ignition ON.
2. Verify the scan tool ISS/OSS Supply Voltage parameter displays OK.

If OK is not displayed

Refer to Circuit/System Testing.

If OK is displayed

3. Engine idling, transmission in Park.
4. Verify the scan tool Transmission ISS parameter changes without spikes or dropouts, while varying the engine speed.

If the Transmission ISS does not change with engine speed or has spikes or dropouts

Refer to Circuit/System Testing.

If the Transmission ISS changes with engine speed and there are no spikes or dropouts

5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
6. Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing.

If the DTC does not set

7. All OK.

Circuit/System Testing

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

1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
2. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
3. Connect the DT-48616-10 adapter harness between the vehicle harness connector and the Q8 Control Solenoid Valve Assembly connector. Ignition ON.
4. Test for 11-13 V between the ISS 12 V circuit terminal B on the Q8 Control Solenoid Valve Assembly X3 connector and ground.

If not between 11-13 V

Replace the Q8 Control Solenoid Valve Assembly.

If between 11-13 V

5. Verify the scan tool Transmission ISS parameter is between 495-505 RPM when performing the input shaft speed test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test.

If not between 495-505 RPM

Replace the Q8 Control Solenoid Valve Assembly.

If between 495-505 RPM

6. Verify there is no damage to the reluctor, which is attached to the 4-5-6 clutch and 3-5-R clutch housing assembly, or misalignment between the B14C Transmission Input Shaft Speed Sensor and reluctor.

If the reluctor is damaged or misaligned

Repair or replace as necessary.

If the reluctor is not damaged or misaligned

7. Replace the B14C Transmission Input Shaft Speed Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Perform the Transmission Adaptive Values Learn following all transmission repairs
• Input and Output Speed Sensor Installation
• Input and Output Speed Sensor Removal
• Control Module References - for Control Solenoid Valve Assembly replacement, programming and setup

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