2010 Cadillac Truck SRX FWD V6-3.0L Page 2114

2010 Cadillac Truck SRX FWD V6-3.0L Page 2114

- Clutch Pressure Control (PC) Solenoid 5 Control Circuit Low Voltage

DTC P2730

- Clutch Pressure Control (PC) Solenoid 5 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid valve assembly which has no serviceable components. The normally low

PC solenoid 5 regulates and directs oil pressure to the 1-2-3-4 clutch regulator valve and 1-2-3-4 clutch boost valve. Increasing PC solenoid 5

pressure increases pressure to the 1-2-3-4 clutch. The TCM varies the current to the PC solenoid 5 through a low side driver. Increasing the current

to PC solenoid 5 increases oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to PC solenoid 5 decreases oil pressure by

opening the exhaust port. PC solenoid 5 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and

components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will

reset.

Conditions for Running the DTC

P2728

* DTC P2728 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

P2729

* DTC P2729 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

P2730

* DTC P2730 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

Conditions for Setting the DTC

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit where the measured clutch PC solenoid

5 current does not equal the commanded clutch PC solenoid 5 current for 5 seconds.

P2729

The TCM detects a short to ground on the clutch PC solenoid 5 control circuit for 1 second.

P2730

The TCM detects an open or short to voltage on the clutch PC solenoid 5 control circuit for 1 second.

Action Taken When the DTC Sets

P2728

* DTC P2728 is a Type C DTC.

* The TCM freezes transmission adaptive functions on the 1-2-3-4 clutch.

P2729

* DTC P2729 is a Type A DTC.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM inhibits Tap Up/Down function.

* The TCM inhibits manual shifting of forward gears.

* The TCM limits then the transmission to reverse, 1st and 3rd gear.

P2730

* DTC P2730 is a Type A DTC.

* The TCM inhibits the TCC.