Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information TCM-P272900

Condition
Linear pressure solenoid SLB1 controls system pressure in the transmission. The solenoid is controlled by a power stage located on the output of the transmission control module (TCM). The control module uses the power stage to control the current to the solenoid. A low amperage results in a high line pressure. A high amperage (approximately 1A) results in a low line pressure. The amperage is primarily affected by the throttle position.
The diagnostic trouble code is stored if the control module detects:
- An open circuit in solenoid SLB1 circuit.
Then Solenoid SLB1 cannot control the system pressure.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition on.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.





Substitute value
- Auxiliary program Emergency mode 1 in the transmission control module (TCM) has started.

Hint: Emergency mode in case of malfunction, B6304T4, TF-80SC AWD, B6324S5, TF-80SC AWD, B6324S5, TF-80SC, B6324S4, TF-80SC AWD, B6324S4, TF-80SC Emergency Mode In Case Of Malfunction

Possible source
- Contact resistance in the terminals.
- Open-circuit in the cable for the control signal or signal ground.
- The signal cable is short-circuited to ground.
- Line pressure solenoid SLB1 does not work.
- The transmission control module (TCM) does not function.

Fault symptom[s]
- Automatic transmission/No automatic gearshift
- Automatic transmission/Shifts rough or jerky/Unsure when/at all times
- Text window and warning symbol/Yellow symbol and text message
- Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication
- Automatic transmission/No manual gear shift
- Automatic transmission/Lockup does not work
- Driving/Poor performance/lacks power