2010 Cadillac CTS Sedan AWD V6-3.0L Page 1714
Circuit/System Description
The clutch pressure (PC) solenoid 3 is part of the control solenoid valve assembly which has no serviceable parts. The normally high clutch PC
solenoid 3 regulates and directs the clutch PC solenoid 3 oil pressure to the 4-5-6 clutch regulator valve and 4-5-6 clutch boost valve. Increasing
clutch PC solenoid 3 oil pressure increases oil pressure to the 4-5-6 clutch assembly. The TCM varies the current to the PC solenoid 3 through a
low side driver. Decreasing the current to the clutch PC solenoid 3 increases clutch PC solenoid 3 oil pressure by closing OFF the solenoid exhaust
port. Increasing the current to the clutch PC solenoid 3, decreases clutch PC solenoid 3 oil pressure by opening the solenoid exhaust port. Clutch
PC solenoid 3 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
P0969, P0970, or P0971
* DTCs P0969, P0970, or P0971 have not set this ignition.
* The ignition voltage is 8.6 volts or greater.
* The engine speed is 500 RPM or greater for 5 seconds.
* The clutch PC solenoid 3 is commanded ON.
Conditions for Setting the DTC
P0969
The TCM detects an internal electrical malfunction on the clutch PC solenoid 3 control circuit where the measured PC solenoid 3 current does not
equal the commanded clutch PC solenoid 3 current for 5 seconds.
P0970
The TCM detects a short to ground on the clutch PC solenoid 3 control circuit for 1 second.
P0971
The TCM detects an open or short to voltage on the Clutch PC solenoid 3 control circuit for 1 second.
Action Taken When the DTC Sets
P0969
* DTC P0969 is a Type C DTCs.
* The TCM freezes transmission adaptive functions.
P0970
* DTC P0970 is a Type A DTC.
* The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse gear based on the default detected.
* The TCM forces HSD1 OFF.
* The TCM forces TCC OFF.
* The TCM freezes transmission adaptive functions.
* The TCM commands maximum line pressure.
* The TCM enables Torque management.
* The TCM inhibits TAP Up/Down function.
P0971
* DTC P0971 is a Type A DTC.
* The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse gear based on the default detected.
* The TCM forces TCC OFF.
* The TCM freezes transmission adaptive functions.
* The TCM commands maximum line pressure.
* The TCM enables Torque management.
* The TCM inhibits TAP Up/Down function.
