Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Linear pressure solenoid SLB1 controls the shifts in the transmission. Solenoid SLB1 operates when it receives power from the transmission control module (TCM). Depending on the vehicle speed, throttle position and selected driving program the solenoid is operated in different driving conditions.
If the transmission control module (TCM) registers that the measured current in the solenoid circuit is incorrect, the diagnostic trouble code (DTC) is generated. The SLB1 solenoid is then not able to regulate the system pressure.
The diagnostic trouble codes (DTCs) can be diagnosed during shifting when the line pressure solenoid SLB1 is activated.

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

Hint: Emergency mode in case of malfunction Emergency Mode In Case of Malfunction

Possible source
- Contact resistance in the terminals
- Open circuit in lead for control signal or signal ground.
- Line pressure solenoid SLB1 jammed.
- Line pressure solenoid SLB1 does not work.

Fault symptom[s]
- General warning lamp lit
- Malfunction indicator lamp (MIL) lit.
- Harsh gear changing
- No gear changing.
- Abnormally slipping gears.