P1831
Symptom: CHECK GEARBOX warning lamp on.
TCM in Limp-Home mode.
Downshifting. Mechanical Fault.
Fault symptoms
CHECK GEARBOX warning lamp on.
TCM in Limp-Home mode.
Conditions
The difference between engine speed and the transmission's input shaft speed is greater than 100 rpm for 10 seconds.
Diagnosis will not be performed if:
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The engine is idling or running at more than 4000 rpm.
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DTC P1817 has been generated.
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Less than 5 seconds has elapsed since shifting occurred.
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Diagnostic procedure
1 Check the fault symptom
Check the problem by driving the car following
Test drive schedule
. Note any fault symptoms.
Are there any fault symptoms?
Continue with
Mechanic and hydraulic faults
and then with step 2.
Continue with step 2.
2 Final check
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Clear all diagnostic trouble codes in the system.
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Perform a driving cycle:
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Drive the car at varying loads and engine speeds for 5 minutes.
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Evaluate the driving cycle:
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Make sure the trouble code has not recurred.
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Has the trouble code recurred?
Continue with
Diagnostic procedure before replacing control module
.
The steps taken to rectify the fault were correct.
