Signal Too Low
Signal too low
Checking shift solenoid S3
- Ignition on
- Activate solenoid S3.
Check the status of solenoid S3. The status must switch between OFF and ON.
The fault is permanent if the status does not change.
If the status changes, this is an indication that the fault was present previously but is not active at the moment, i.e. an intermittent fault.
Continue - Checking the wiring and component
-------------------------------------------------
Checking the wiring and component
- Ignition off
- Open the transmission control system.
Check connector C (22-pin) for the transmission control module (TCM). Check for contact resistance. Check for oxidation.
Check the cable between transmission connector terminal #C17 and the connector for solenoid S3. Check for a short-circuit to ground.
Hint: Check solenoid S3 by taking a reading of the resistance between the solenoid connector and ground with the ignition off, the transmission connector C (22-pin) disconnected and the breakout box connected. For the resistance values, see below.
Other information
- Connecting the breakout box, AW55-50/51SN Connecting Breakout Box, Transmission Control Module (TCM)
- To disconnect the transmission connectors, see Transmission control module (TCM) Service and Repair
- Control system, replacing Service and Repair
- Cable harness/temperature sensor, replacing Service and Repair
- Signal specification, AW55-50/51SN Signal Specification, Transmission Control Module (TCM)
- Solenoid control system, replacing Service and Repair
- Component resistance values, AW55-50/51SN [1][2]Specifications
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Resetting adaptation and oil quality counter
-------------------------------------------------
Resetting adaptation and oil quality counter
Resetting adaptation
Resetting adaptation and the counter for "Transmission oil change"
Hint: The transmission has torque controlled adaptive pressure control. Pressure control means that the transmission regulates the pressure itself during each gear shift. This avoids harsh gear shifting. Each gear shift is evaluated by the transmission control module (TCM) and stored in the memory. This allows for compensation for wear and tear in the transmission and clutch. It is important that the adaptation in the memory is reset after the transmission has been repaired. This is to ensure normal operation. The oil is replaced during repair; the "Transmission oil change" counter must be reset. If the counter is not reset when the fluid is drained and replaced, there is a risk that a diagnostic trouble code (DTC) will be stored in incorrect circumstances.
Note! This applies only if the transmission or one of the components in the transmission have been replaced.
- Ignition on.
- Gear selector in position P
Click on the VCT2000 symbol to reset the adaptation and counter.
Continue - DONE
------------------------
DONE - Verification
-------------------------------------------------
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Activate solenoid S3. Click on the VCT2000 symbol.
Read off the status of solenoid S3. The status must switch between OFF and ON.
Was the function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
------------------------
VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
-------------------------------------------------
Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
------------------------
Attempt New Test - Checking shift solenoid S3
-------------------------------------------------