Circuit Description
The throttle pressure that is applied to the primary regulator valve modulates the line pressure causing the line pressure solenoid valve to precisely modulate and create line pressure according to throttle position or engine load. This modulation action controls the line pressure which in turn provides smoother shifts between gears.
When the powertrain control module (PCM) receives the throttle position opening angle, the PCM controls the line pressure by sending a predetermined duty cycle to the solenoid valve.
The line pressure solenoid valve controls the transaxle line pressure for smooth transaxle operation based on signals from the throttle position (TP) sensor and the vehicle speed sensor (VSS).
When the PCM detects a continuous open or short to ground in the line pressure solenoid circuit, then DTC P2716 sets.
DTC P2716 is a type B DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P2716 Line Pressure Control Solenoid
Conditions for Running the DTC
The PCM detects a open or short to ground in line pressure solenoid circuit.
Conditions for Setting the DTC
DTC P2716 sets when either of the following conditions occurs:
| • | The PCM detects an open in the solenoid circuit. |
| • | The PCM detects an short to ground in the solenoid circuit. |
Action Taken When the DTC Sets
| • | At the time of the first failure, the PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as a Failure Record. |
| • | The PCM illuminates the malfunction indicator lamp (MIL) during the first consecutive failure in which the Conditions for Setting the DTC are met. |
| • | The PCM turns OFF power to the solenoid. |
| • | The PCM stores DTC P2716 in PCM history. |
Conditions for Clearing the MIL/DTC
| • | A scan tool can clear the MIL/DTC. |
| • | The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring. |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Automatic Transmission Controls Schematics | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
Important:
Does the solenoid operate? | -- | Go to Step 6 | Go to Step 3 | |||||||
3 |
Did you find a condition? | -- | Go to Step 7 | Go to Step 4 | ||||||
4 |
Did you find a condition? | -- | Go to Step 8 | Go to Step 5 | ||||||
5 | Test the line pressure solenoid valve for a resistance value as specified. Is the resistance within specified limits? | 5.0 - 5.6 ohms at 20°C (68°F) | Go to Step 6 | Go to Step 9 | ||||||
6 | Replace the PCM. Refer to Control Module References for PCM replacement, setup and programming. Is the replacement complete? | -- | Go to Step 10 | -- | ||||||
7 | Perform the necessary wiring repairs. Refer to Wiring Repairs . Is the action complete? | -- | Go to Step 10 | -- | ||||||
8 | Replace the internal transmission wiring harness. Refer to Solenoids and Wiring Harness Replacement . Is the replacement complete? | -- | Go to Step 10 | -- | ||||||
9 | Replace the line pressure solenoid valve. Refer to Solenoids and Wiring Harness Replacement . Is the replacement complete? | -- | Go to Step 10 | -- | ||||||
10 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | Go to Step 11 | Go to Step 2 | ||||||
11 | With the scan tool, observe the stored information, capture info and DTC info. Does the scan tool display any DTCs that you have not diagnosed? | -- | System OK | |||||||
