DTC Advanced Diagnostics: P0976
DTC P0976:Shift Solenoid Valve "B" Circuit Low

General Description

Torque converter clutch status by shift solenoid valve B output

Torque Converter Clutch
Shift Solenoid Valve B
OFF
OFF
ON
ON

Shift solenoid valve B controls the drain circuit close/open commanded by the powertrain control module (PCM) ON/OFF commands. Fluid passages which supply/discharge the hydraulic pressure to torque converter clutch is switched by shift solenoid valve B ON/OFF control. The PCM commands the driver circuit to turn on shift solenoid valve B. The circuit diagnoses malfunctions such as a circuit short or open, and sends back a return signal during the PCM's command. When the return signal does not match the PCM command to turn ON shift solenoid valve B, 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
Two drive cycles, MIL on, A/T gear position indicator blinks
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [Battery Voltage]
10.0 V
–
No active DTCs set (prevents monitor from running)
P0716, P0717, P0741, P0746, P0777, P0780, P0792, P0793, P0796, P0797, P0962, P0963, P0966, P0967, P0970, P0971, P0977, P1898, P1899, P2715, P2720, P2721
[ ]: HDS Parameter

Malfunction Threshold
The return signal does not match the command to turn ON shift solenoid valve B [Shift Sol B] for at least 1 second.

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.
Shift solenoid valve B SOL B line short to ground
Shift solenoid valve B power supply line failure (includes fuse blown)
Shift solenoid valve B internal circuit short
PCM internal circuit failure

Confirmation Procedure
Operating Condition
1.
Start the engine. Hold the engine speed [Engine Speed] at 3,000 rpm without load (in P or N) until the radiator fan comes on.
2.
Drive the vehicle in D at a steady speed of 37 mph (60 km/h), for at least 10 seconds.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
With the HDS
None.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
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 or by disconnecting the 12 volt battery.