DTC Advanced Diagnostics: P0970
DTC P0970:A/T Clutch Pressure Control Solenoid Valve C (Open or Short) (Engine Type: J35Y1)

General Description


A/T clutch pressure control solenoid valve C is used for clutch pressure control. A spool in A/T clutch pressure control solenoid valve C pushes the valve according to the duty cycle that is controlled by the powertrain control module (PCM) (The hydraulic pressure is proportional to the current). The PCM measures the current flowing through A/T clutch pressure control solenoid valve C, and uses feedback control to compensate for the difference between the actual current and the commanded one. If the measured current for the PCM output duty cycle is not within a specified range (circuit short or open), the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status
Execution
Continuous
Sequence
None
Duration
1 second or more
DTC Type
One drive cycle, MIL on, A/T gear position indicator blinks
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
Battery voltage
[BATTERY VOLTAGE]
11 V
–
No active DTCs set (prevents monitor from running)
P0966, P0967, P0971, P0976, P0977
[ ]: HDS Parameter

Malfunction Threshold
The measured current for the PCM’s command value is as specified here for at least 1 second.

Duty (%)
Current (A)
Failure mode
56.5 - 89
Less than 0.19
Low Input
More than 89
Less than 0.27
Low Input

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
A/T clutch pressure control solenoid valve C LSC line short to ground
A/T clutch pressure control solenoid valve C LSC line open (includes connector loose connection or disconnection)
A/T clutch pressure control solenoid valve C internal circuit short
A/T clutch pressure control solenoid valve C internal circuit open
A/T clutch pressure control solenoid valve C power supply line open
A/T clutch pressure control solenoid valve C power supply line short to ground
PCM internal circuit failure

Confirmation Procedure
Operating Condition
Start the engine, and wait for at least 1 second.

With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on, the A/T gear position indicator blinks, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The A/T gear position indicator comes off by pressing the engine start/stop button to select the OFF mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.