P2502
The gear is implausible or the transmission is slipping.
Possible cause:
- Mechanical or hydraulic defect in the transmission
Affected functions:
- Engine diagnosis
- Automatic transmission Function
-------------------------------------------------
Test 1: Possible causes and remedial action when fault code P2502 is displayed
1. Possible causes and remedial action when fault code P2502 is displayed
Test 1.1: Notes on repair : Remedial actions MUST be processed in sequence.
Test 1.2: The oil level in the automatic transmission is too low.
Test 1.3: Output speed has exceeded the limit value.
Test 1.4: The oil filter is not installed in the automatic transmission.
Test 1.5: Incorrect rear axle ratio
Test 1.6: Incorrect variant coding in component N15/3 (ETC [EGS] control unit)
Test 1.7: Component Y3/6y1 (Modulating pressure control solenoid valve) is blocked as a result of the effect of a foreign body.
Test 1.8: Control valve, shift valve, or command valve of the appropriate gearshift are blocked by the effect of a foreign body.
Test 1.9: Circlip of ball bearing of output shaft missing or has jumped out of groove.
Test 1.10: Circlip of axial bearing K3 missing or has jumped out of groove.
Test 1.11: Circlip of dished washers B2/B3 has jumped out of groove.
Test 1.12: Seal of clutch K3 is faulty because of wear of the plain bearing between input shaft and output shaft.
Test 1.13: Internal fault in component Y3/6 (electrical control module):
1.1. Notes on repair : Remedial actions MUST be processed in sequence.
1.1. No further information available.
1.2. The oil level in the automatic transmission is too low.
Test 1.2.1: Operation number of operation texts and work units or standard texts and flat rates:27-0641
Test 1.2.2: Possible remedy
Test 1.2.3: Inspect oil level, adjust to correct level if necessary.
Test 1.2.4: Repair instructions for automatic transmission
1.2.1. Operation number of operation texts and work units or standard texts and flat rates:27-0641
1.2.1. No further information available.
1.2.2. Possible remedy
1.2.2. No further information available.
1.2.3. Inspect oil level, adjust to correct level if necessary.
1.2.3. No further information available.
1.2.4. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.2.4. No further information available.
1.3. Output speed has exceeded the limit value.
NOTE
- Read out fault memory of control unit N15/3 (ETC [EGS] control unit).
- Evaluation of fault freeze frame data for fault code P2502
Specified values
- The difference between the turbine speed stored in the fault freeze frame data and the output speed must not exceed the limit value of 450 rpm.
Continue with button "F2"
Question
- Is the difference between the turbine speed and the output speed less than 450 rpm?
YES
REQUIREMENT
- The difference between the turbine speed and the output speed is less than 450 rpm.
REMEDY
- Replace component N15/3 (ETC [EGS] control unit).
End of test
NO
REQUIREMENT
- The difference between the turbine speed and the output speed is greater than 450 rpm.
RESULT
- No further action is necessary.
End of test
1.4. The oil filter is not installed in the automatic transmission.
Test 1.4.1: Repair instructions for automatic transmission
Test 1.4.2: Possible remedy
Test 1.4.3: Install the oil filter in the automatic transmission.
1.4.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.4.1. No further information available.
1.4.2. Possible remedy
1.4.2. No further information available.
1.4.3. Install the oil filter in the automatic transmission.
1.4.3. No further information available.
1.5. Incorrect rear axle ratio
Test 1.5.1: Possible remedy
Test 1.5.2: Check rear axle ratio.
Test 1.5.3: Repair instructions for automatic transmission
1.5.1. Possible remedy
1.5.1. No further information available.
1.5.2. Check rear axle ratio.
1.5.2. No further information available.
1.5.3. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar3500z9000ag ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar3500z9000ag ] in the 'Contents' field.
1.5.3. No further information available.
1.6. Incorrect variant coding in component N15/3 (ETC [EGS] control unit)
Test 1.6.1: Possible remedy
Test 1.6.2: Check variant coding, transfer if necessary.
1.6.1. Possible remedy
1.6.1. No further information available.
1.6.2. Check variant coding, transfer if necessary.
Warning!Communication with ECU required.
1.7. Component Y3/6y1 (Modulating pressure control solenoid valve) is blocked as a result of the effect of a foreign body.
Test 1.7.1: Repair instructions for automatic transmission
Test 1.7.2: Possible remedy
Test 1.7.3: Replace component Y3/6y1 (Modulating pressure control solenoid valve).
1.7.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.7.1. No further information available.
1.7.2. Possible remedy
1.7.2. No further information available.
1.7.3. Replace component Y3/6y1 (Modulating pressure control solenoid valve).
1.7.3. No further information available.
1.8. Control valve, shift valve, or command valve of the appropriate gearshift are blocked by the effect of a foreign body.
Test 1.8.1: Repair instructions for automatic transmission
Test 1.8.2: Possible remedy
Test 1.8.3: Inspect ease of operation of appropriate slide valves, repair any sticking valves.Additionally ensure that these slide valves reach their end position in the hydraulic unit.
1.8.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.8.1. No further information available.
1.8.2. Possible remedy
1.8.2. No further information available.
1.8.3. Inspect ease of operation of appropriate slide valves, repair any sticking valves.Additionally ensure that these slide valves reach their end position in the hydraulic unit.
1.8.3. No further information available.
1.9. Circlip of ball bearing of output shaft missing or has jumped out of groove.
Test 1.9.1: Repair instructions for automatic transmission
Test 1.9.2: Possible remedy
Test 1.9.3: Replace automatic transmission.
Test 1.9.4: Flush out radiator and lines.
Test 1.9.5: Replace the torque converter only if swarf is present in it.
1.9.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.9.1. No further information available.
1.9.2. Possible remedy
1.9.2. No further information available.
1.9.3. Replace automatic transmission.
1.9.3. No further information available.
1.9.4. Flush out radiator and lines.
1.9.4. No further information available.
1.9.5. Replace the torque converter only if swarf is present in it.
1.9.5. No further information available.
1.10. Circlip of axial bearing K3 missing or has jumped out of groove.
Test 1.10.1: Repair instructions for automatic transmission
Test 1.10.2: Possible remedy
Test 1.10.3: Replace automatic transmission.
Test 1.10.4: Flush out radiator and lines.
Test 1.10.5: Replace the torque converter only if swarf is present in it.
1.10.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.10.1. No further information available.
1.10.2. Possible remedy
1.10.2. No further information available.
1.10.3. Replace automatic transmission.
1.10.3. No further information available.
1.10.4. Flush out radiator and lines.
1.10.4. No further information available.
1.10.5. Replace the torque converter only if swarf is present in it.
1.10.5. No further information available.
1.11. Circlip of dished washers B2/B3 has jumped out of groove.
Test 1.11.1: Repair instructions for automatic transmission
Test 1.11.2: Possible remedy
Test 1.11.3: Replace automatic transmission.
Test 1.11.4: Flush out radiator and lines.
Test 1.11.5: Replace the torque converter only if swarf is present in it.
1.11.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.11.1. No further information available.
1.11.2. Possible remedy
1.11.2. No further information available.
1.11.3. Replace automatic transmission.
1.11.3. No further information available.
1.11.4. Flush out radiator and lines.
1.11.4. No further information available.
1.11.5. Replace the torque converter only if swarf is present in it.
1.11.5. No further information available.
1.12. Seal of clutch K3 is faulty because of wear of the plain bearing between input shaft and output shaft.
Test 1.12.1: Repair instructions for automatic transmission
Test 1.12.2: Possible remedy
Test 1.12.3: Replace automatic transmission.
Test 1.12.4: Flush out radiator and lines.
Test 1.12.5: Replace the torque converter only if swarf is present in it.
1.12.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.12.1. No further information available.
1.12.2. Possible remedy
1.12.2. No further information available.
1.12.3. Replace automatic transmission.
1.12.3. No further information available.
1.12.4. Flush out radiator and lines.
1.12.4. No further information available.
1.12.5. Replace the torque converter only if swarf is present in it.
1.12.5. No further information available.
1.13. Internal fault in component Y3/6 (electrical control module):
Test 1.13.1: Repair instructions for automatic transmission
Test 1.13.2: Possible remedy
Test 1.13.3: Replace component Y3/6 (electrical control module).
1.13.1. Repair instructions for automatic transmission
Note
- WIS is not available on this system.
- It is not possible to display the requested WIS document [ ar2700z9722ac ].
- You can start WIS on another system and display the WIS document by entering the document number [ ar2700z9722ac ] in the 'Contents' field.
1.13.1. No further information available.
1.13.2. Possible remedy
1.13.2. No further information available.
1.13.3. Replace component Y3/6 (electrical control module).
1.13.3. No further information available.