P0716

Diagnostic Chart:

Wiring Diagram - Turbine Shaft Speed Sensor:

Speed signal noise is an irregularity in the normal stream of turbine shaft speed sensor signal pulses. There are three conditions that are identified as noise: Missing pulses in a revolution of the turbine shaft, extra pulses in a revolution of the turbine shaft, time between pulses too long in comparison to engine speed and output speed.

DTC PARAMETERS

DTC P0716 is set when the PCM has detected the following conditions for more than 70 milliseconds, twice per ignition cycle.

^ Turbine shaft speed noise parameter status = yes.

^ Turbine shaft speed greater than 1400 rpm.

^ Noise present for 0.7 seconds.

TEST DESCRIPTION

Numbered steps below refer to numbered steps on chart.

1. This test checks PCM connector for open, spread or corroded terminals, or loose wires.

2. This test checks turbine shaft speed (TSS) sensor connector for open, spread, corroded terminals or loose wires.

3. This test checks PCM for internal intermittent faults.

4. This step is a visual inspection of the TSS sensor connector and the PCM connector to check for open, spread or corroded terminals.

5. This step checks for secondary ignition wires routed close to TSS sensor circuits 1230 and 1231 and lists other potential causes.

REPAIR VERIFICATION

Monitor DTC menu " Code Status" for "Pass Since Code Clear" and "Pass This Ignition Cycle." When both have passed, repair is verified.

Criteria for pass:

^ Same as fail criteria.

^ Noise not present for 0.5 seconds.

DIAGNOSTIC AIDS

When attempting to diagnose an intermittent problem use the Scan tool* to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

* Select MALF History and DTC status from DTC menu of Scan tool.

Check the tightness of the female terminal grip with a spare male terminal.

Check wire routing for possible chafed wires.