Table 1: | Transaxle Oil Leakage |
Table 2: | Transaxle Oil Leakage |
Table 3: | Shift Quality |
Table 4: | Malfunction |
Important: Careful localization of leakage points may make it possible to prevent incorrect or cost-intensive repairs.
• | Thoroughly clean the transaxle, engine, and surrounding area using a steam jet, for example. |
• | To locate leakage, use a suitable identifying spray or similar product. |
• | Depending on the amount of leakage, take the vehicle for a short or a longer test drive - It may prove sufficient to place the vehicle on a hoist and run the engine at idle speed to trace the leak. |
• | If possible, determine exactly which type of oil is escaping. |
Condition | Action | ||||||||
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Oil Pump-Torque Converter Sealing |
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Crankshaft Sealing Ring |
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Torque Converter |
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Oil Content Too High |
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O-ring at Bolt Head Damaged or Missing |
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Shaft Seal |
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Hose Clamp Loose |
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Oil Pan Gasket Not Installed Properly |
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Oil Pan Gasket Damaged |
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Bolt at Bracket Loose | Verify the torque of the bracket bolt. Tighten the bolt, if necessary. | ||||||||
Sealing Ring at Oil Dipstick |
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Sealing Ring Near End-Cover Connection Defective |
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Sealing Ring Selector Shaft |
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O-Ring at Socket Outlet |
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O-Ring and Speed Sensor Connection |
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Oil Leak Incorrectly Identified | No oil leak is possible at this point. | ||||||||
Speed Sensor Itself Is Leaking |
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Hair Line Crack at the Piping in the Connection Area, Sealing Ring Fit in Transaxle Housing |
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O-ring Defective, Incorrect |
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Plug Loose | Verify the torque for the screw plug. |
Condition | Action | ||||||
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Transmission Fluid Level Too Low |
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Monolith in Catalytic Converter Has Broken |
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Noise From Auxiliaries - E.G. Exhaust System, Alternator, Drive Shafts | Inspect the following components to eliminate the faults:
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Noise From Tires Or Wheel Bearings | Eliminate the fault if necessary. | ||||||
Noise From Planetary Gears | Whistling noise on the traction and overrun in 1st gear only caused by high rotating speeds functionally unavoidable | ||||||
Cumulative Tooth Backlash In The Complete Drive Line | Production status - Explain to the customer. | ||||||
Jerky Noise Of The Parking Lock - E.G. When The Vehicle Is Standing On A Gradient |
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The Engine's Torsional Vibrations Are Being Transmitted To The Drive Shafts |
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Torque Reaction Strut Loose | Inspect the mounting and repair if necessary. |
Important:
• | The assessment of shift quality is, to a large extent, an individual, subjective matter. Take careful note of how the customer describes the complaint and the manner in which he or she handles the vehicle and the controls. |
• | A sudden deterioration of shift quality may also be cause by the transaxle selection an emergency or substitute program. |
• | Carry out the general checks described in the automatic transaxle diagnostic information. |
• | Perform a test drive to answer the following questions. |
- | In which driving situation does the shift quality complaint arise? |
- | To which shifts does the complaint apply? |
- | Is the complaint reproducible within a short period or has it only occurred sporadically or on a single occasion? |
• | Check the oil level and oil quality. |
• | Interrogate the fault memory and read out measurement block data. |
Condition | Action | ||||
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Rapid Pressure Build-up in the Clutch | Operating error position selected several times in quick succession. | ||||
Jerk When Parking Lock is Released | Refer to Noise Symptom table. | ||||
Incorrect Electronic Transaxle Control Module | Inspect the data status for transaxle control module. | ||||
Accelerator Pedal in Indefinite Position Between Full Throttle and Kick Down |
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Control Overlap Between to Clutches During Shift |
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Temperature Sensor - Not Fault Memory | Inspect the function according to the Drive Range 4th gear, Emergency/Substitute Mode or Drive Range 3rd gear, Emergency/Substitute Mode. | ||||
Kick Down Setting Incorrect |
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Important: The faults dealt with here concern the transaxle functions such as traction, forward and reverse, and all types of shifts. Entries will not always be made in the fault memory.
Perform the general inspections according to the automatic transaxle diagnostic procedure.
• | Test drive the vehicle. |
• | Inspect the oil level and quality. |
• | Interrogate the fault memory. |
Condition | Action | ||||
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Vehicle will not move or shift, even with the TCM disconnected. |
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Kick Down Switch Not Functioning Properly | For checking and remedial action, refer to Drive Range - Third Gear, Emergency/Substitute Mode or Drive Range - Fourth Gear, Emergency/Substitute Mode . | ||||
Vehicle Is in Emergency Mode | For checking and remedial action, refer to Drive Range - Third Gear, Emergency/Substitute Mode or Drive Range - Fourth Gear, Emergency/Substitute Mode . |