Fault-Tracing Information
Fault-tracing
Checking the gear system
Fault-tracing information
Checking the gear system
Problems that the customer may experience are hard shifts or slipping shifts. The following test-drive contains several different driving situations that may provoke these symptoms if the transmission is damaged.
Note! It is important that the transmission oil is above 70 °C before the test-drive starts!
Test 1
1. Driving at 100 km/h, 6th gear.
2. Perform a kickdown to 4th gear.
3. Let the transmission automatically shift up to 5th gear.
4. Let up the accelerator pedal and let the transmission shift up to 6th gear.
Test 2
1. Driving at 100 km/h, 6th gear.
2. Slight uphill grade, press accelerator pedal until you obtain shifting 6-5, not kickdown.
Test 3
1. Driving at 80 km/h.
2. Move the gear selector to position M and engage 6th gear.
3. Perform a kickdown and shift 6-5, 5-4, 4-3 at the same time.
4. Then upshift immediately to 6th gear.
Test 4
1. Driving with gear 4.
2. Let up the accelerator pedal so that downshift to 3rd gear takes place.
Test 5
1. Stationary vehicle, engine running, parking brake applied, brake activated with left foot, gear selector in position R.
2. Press down the accelerator pedal (brake still activated).
Note! Let up the accelerator pedal in case of noise or slipping.
Test 6
1. Stationary vehicle, engine running, parking brake applied, brake activated with left foot, gear selector in position D.
2. Press down the accelerator pedal (brake still activated).
Note! Let up the accelerator pedal in case of noise or slipping.
If the symptoms hard shifts or slipping shifts arise during the test-drive, the transmission's control system must be replaced.
Other information
Is the function OK?
Yes - DONE
No - FAULT FOUND
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DONE - Checking solenoids
FAULT FOUND - Resetting the adaptation and oil quality counter
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Checking solenoids
- Ignition on.
- Activate the solenoids by clicking on the symbol for VCT2000.
Select a solenoid and read off the current through the solenoid's circuit. The current should shift between approx. 100 and 950 mA.
Solenoid SLT, SLC2, SLB1.
Is the function OK?
Yes - Checking the oil quality and the oil level in the transmission
No - Checking the components and wiring
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Checking the components and wiring
- Ignition off.
- Open the transmission control system.
Check connector B (22-pin) for the transmission control module (TCM). Check for damaged or pressed in pins. Check for contact resistance and oxidation.
Hint: Check solenoids SLT, SLC2, SLB1 as described in: Checking internal components of the transmission Checking Internal Components Of The Transmission
If no defects were found on connectors or cables, replace the transmission.
Remedy as necessary.
Other information
- Removal: Transmission, B6324S5, TF-80SC, B6324S4, TF-80SC Transmission
- Installation: Transmission, B6324S5, TF-80SC, B6324S4, TF-80SC Transmission
- Valve housing
- Transmission Control Unit Wiring Harness Transmission Control Unit Wiring Harness
- To access connector B: Transmission Control Module (TCM) Transmission Control Module (TCM)
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Resetting the adaptation and oil quality counter
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Verification
Verification
Note! When the transmission's control module has been removed and reinstalled, it is important that the gear position sensor is calibrated. Select Pause and create a bookmark. Then select Vehicle communication.
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall the connectors, components etc.
- Test drive the vehicle following: Test drive schedule, description, B6304T4, TF-80SC AWD, B6324S5, TF-80SC AWD, B6324S5, TF-80SC, B6324S4, TF-80SC, B6324S4, TF-80SC AWD Test Drive Schedule, Description
Check that the transmission does not display any obvious function faults.
Note! When test driving, the oil temperature must be above 20 °C.
Is the function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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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
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Attempt New Test - Checking the oil quality and the oil level in the transmission
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Resetting the adaptation and oil quality counter
Resetting adaptation
Resetting the adaptation and the counter for "Transmission oil, replace"
Hint: The transmission has torque-regulated, adaptive pressure regulation. The pressure regulator enables the transmission to regulate pressure during each shift to prevent hard shifting. Each shift is assessed by the transmission control module (TCM) and is stored in the internal memory. This makes it possible to compensate for transmission and clutch wear. It is important that the adaptation in the memory is reset so that the transmission works normally after the repair. Because the fluid was changed during the repair, the counter for transmission fluid change must also be reset. If the counter is not reset during draining/replacement, a diagnostic trouble code may be generated under the wrong conditions.
Note! This applies only if the transmission or one of the components in the transmission have been replaced.
- Ignition on.
Click on the VCT2000 symbol to reset the adaptation and counter.
Continue - DONE
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DONE - Verification
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Checking the oil quality and the oil level in the transmission
Note! Transmission fluid quality and level are extremely important for the function of the transmission. Therefore it is imperative that these are correct. In addition the oil level is dependent on oil temperature.
- Ignition on.
- Read off the oil temperature.
Check the transmission oil level. If the oil level is low, check the transmission for leakage, then top up with oil.
Check the quality of the oil.
Replace the transmission fluid if the fluid smells burnt.
Other information
- Transaxle oil, B6304T4, TF-80SC AWD, B6324S5, TF-80SC AWD, B6324S5, TF-80SC, B6324S4, TF-80SC, B6324S4, TF-80SC AWD Transaxle Oil
Select an alternative below
1. No fault detected.
2. Transmission fluid replaced, low level or poor quality.
1 - Checking the components and wiring
2 - Resetting the adaptation and oil quality counter
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