2010 Cadillac CTS Sedan AWD V6-3.0L Page 1727

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1727

- Shift Solenoid (SS) 2 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The shift solenoid (SS) 2 is part of the control solenoid valve assembly which has no serviceable parts. SS 2 is a normally closed (NC) ON/OFF

solenoid and is controlled by the TCM through a low side driver. When the SS 2 is energized (ON), SS 2 fluid pressure is directed to the clutch

select valve 3. Power to the SS 2 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

P0976 or P0977

* DTCs P0976 or P0977 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 SS 2 is commanded ON or OFF.

Conditions for Setting the DTC

P0976

The TCM detects an internal low voltage electrical malfunction of the SS 2 control circuit when the SS 2 is commanded OFF for 2 seconds.

P0977

The TCM detects an internal high voltage electrical malfunction of the SS 2 control circuit when the SS 2 is commanded ON for 2 seconds.

Action Taken When the DTC Sets

P0976

* DTC P0976 is a Type A DTC.

* The TCM defaults the transmission to 3rd gear or reverse gear.

* The TCM forces the torque converter clutch (TCC) OFF.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM enables Torque Management.

* The TCM inhibits TAP Up/Down function.

* The TCM inhibits manual shifting of forward gears.

P0977

* DTC P0977 is a Type B DTC.

* The TCM inhibits 1st gear.

Conditions for Clearing the DIC/DTC

* DTC P0976 is a Type A DTC.

* DTC P0977 is a Type B DTC.