P0963

DTC P0963

Circuit Description
The automatic transmission (AT) clutch pressure control (PC) solenoid valve 1 regulates modulator pressure based on the current flow from the powertrain control module (PCM). The PCM outputs varying amount of amperage, as necessary for gear change. The AT clutch PC solenoid valve 1 supplies oil pressure proportional to the current to the clutch PC valve 1. The PCM monitors the current flowing through the solenoid and performs feedback control. If the current is not within the specified range for a given duty output, a fault is detected and DTC P0963 sets. DTC P0963 is a type A DTC.

Conditions for Running the DTC
- No Clutch PC Solenoid 1 DTCs P0746 or P0747.
- No Shift Solenoid Valve Performance DTC P0751.
- No Clutch PC Solenoid 2 DTC P0777.
- No Clutch PC Solenoid 2 DTCs P0966 or P0967.
- No SS 1 DTCs P0973 or P0974.
- No SS 2 DTCs P0976 or P0977.
- No SS 3 DTCs P0979 or P0980.
- No TCC PC Solenoid DTCs P2763 or P2764.
- No TCC Enable Solenoid DTCs P2769 or P2770.
- System voltage is greater than 11 volts.
- The engine is running for 1 second or greater.
- System voltage is greater than 11 volts.

Conditions for Setting the DTC
- The AT clutch PC solenoid current flow is 0.6 amp or greater at 12% duty cycle.
- The AT clutch PC solenoid current flow is 0.9 amp or greater at 13-27% duty cycle.

Action Taken When the DTC Sets
- The PCM illuminates the malfunction indicator lamp (MIL).
- The PCM limits the transmission shift to 4th gear.
- The PCM records the operating conditions when the Conditions for Setting the DTC are met.
- The PCM stores this information as Freeze Frame and Failure Records. The PCM stores DTC P0963 in PCM history.

Conditions for Clearing the MIL/DTC
- The PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes.
- 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.

Diagnostic Aids
- Inspect the connectors at the PCM, the AT clutch PC solenoid valve 1, and all other circuit connecting points for an intermittent condition.
- Inspect the circuit wiring for an intermittent condition.
- Inspect for a faulty AT clutch PC solenoid valve 1.
- Inspect for a PCM internal fault.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for voltage at the coil side of the clutch PC solenoid valve 1
4. This step verifies that the PCM is providing ground to the clutch PC solenoid valve 1
5. This step tests for a short to voltage low Control circuit of the clutch PC solenoid valve I

Steps 1 - 7:

Steps 8 - 13:

DTC P0963