P0716-INPUT SPEED SENSOR 1 CIRCUIT PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
Theory of Operation
The transmission control system uses two speed sensors, one to measure input RPM and one to measure output RPM. These inputs are essential for proper transmission operation. Therefore, the integrity
of this data is verified through system checks.
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When Monitored:
The transmission gear ratio is monitored continuously while the transmission is in gear.
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Set Condition:
If there is an excessive change in the Input RPM in any valid gear (R, 1st, 2nd, 3rd, or 4th).
Possible Causes
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(T52) INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN
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(T13) SPEED SENSOR GROUND CIRCUIT OPEN
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(T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
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(T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
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(T13) SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
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INPUT SPEED SENSOR
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POWERTRAIN CONTROL MODULE
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Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC
- 42RLE - STANDARD PROCEDURE)
Diagnostic Test
1.
CHECK TO SEE IF DTC P0716 IS CURRENT
Start the engine.
Place the shifter in Park.
With the scan tool, read the Input Speed Sensor RPM.
Is the Input Speed Sensor reading below 400 RPM?
Yes
No
2.
CHECK THE PCM AND WIRING WITH THE TRANSMISSION SIMULATOR
Turn the ignition off to the lock position.
Remove the Ignition Switch Feed fuse from the TIPM.
CAUTION:
Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.
WARNING:
The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in personal injury or death.
Install the Transmission Simulator, Miller tool #8333 and the Electronic Transmission Adapter kit.
Ignition on, engine not running.
With the Transmission Simulator, set the "Input/Output Speed" switch to "ON" and the rotary switch to the "3000/1250" position.
With the scan tool, read the Input and Output RPM.
Does the Input speed read 3000 RPM and the Output speed read 1250 RPM +/- 50 RPM?
Yes
No
3.
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN
Turn the ignition off to the lock position.
Disconnect the PCM C4 harness connector.
Disconnect the Input Speed Sensor harness connector.
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller
tool #8815 to perform diagnosis.
Measure the resistance of the (T52) Input Speed Sensor Signal circuit between the Input Speed Sensor harness connector and the appropriate terminal of Miller tool #8815.
Is the resistance above 5.0 ohms?
Yes
No
4.
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR AN OPEN
Measure the resistance of the (T13) Speed Sensor Ground circuit between the Input Speed Sensor harness connector and the appropriate terminal of Miller tool #8815.
Is the resistance above 5.0 ohms?
Yes
No
5.
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
Measure the resistance between ground and the (T52) Input Speed Sensor Signal circuit.
Is the resistance Below 5.0 ohms?
Yes
No
6.
CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
Disconnect the Output Speed Sensor harness connector.
Ignition on, engine not running.
With the scan tool under TIPM, actuate the Transmission.
Measure the voltage of the (T52) Input Speed Sensor Signal circuit.
Is the voltage above 0.5 volt?
Yes
No
7.
CHECK THE (T13) SPEED SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE
With the scan tool under TIPM, actuate the Transmission.
Measure the voltage of the (T13) Speed Sensor Ground circuit.
Is the voltage above 0.5 volts?
Yes
No
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Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to
all power and ground circuits. Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply. If no problems are found, replace and program the PCM per the Service Information.
With the scan tool, perform QUICK LEARN.
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Perform 42RLE TRANSMISSION VERIFICATION TEST
(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - STANDARD PROCEDURE)
8.
INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set the DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wiring and connectors while checking for shorted and open circuits.
With the scan tool, check the DTC EVENT DATA to help identify the conditions in which the DTC was set.
Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply.
Were there any problems found?
Yes
No