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DTC P0826: Malfunction of Shift Switch Assembly
 
 
 
 
DIAGNOSTIC FUNCTION
TCM detects the UP/DOWN operation of the shift switch assembly. TCM determines that the malfunction is present if the abnormal value is input.
 
 
JUDGMENT CRITERIA
Input to the shift switch assembly remains abnormal for 1 second.
 
 
PROBABLE CAUSES
  • Malfunction of selector lever assembly (Faulty shift switch assembly)
  • Damaged wiring harness and connectors
  • Malfunction of TCM
 
 
DIAGNOSIS
Required Special Tools
  • MB992006: Extra fine probe
STEP 1. Scan tool (M.U.T.-IIISE) data list.
  • Item 64: Manual mode switch
  • Item 65: Select switch (Up)
  • Item 66: Select switch (Down)
OK: The data list changes in response to the selector lever operation.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Go to Step 2.
 
STEP 2. Shift switch assembly single unit check.
Refer to .
Is the check result normal?
Go to Step 3.
Replace the selector lever assembly (Refer to ).
 
STEP 3. Check for open circuit or short to ground in MSW, UPSW, DWSW line between the selector lever assembly connector and the TCM connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Symptom recheck after erasing diagnostic trouble code.
Is the diagnostic trouble code set?
Replace the TCM.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).