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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 an abnormal value is input.

JUDGEMENT CRITERIA


Input to the shift switch assembly remains abnormal for 1 second.

PROBABLE CAUSES



DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

  • Item 52: Select switch (up)
  • Item 53: Select switch (down)
(Refer to Data List Reference Table .)

Q. Is the check result normal?
Intermittent malfunction
Go to Step 2.

STEP 2. Check shift switch assembly
Refer to .

Q. Is the check result normal?
Go to Step 3.
Replace the selector lever assembly.

STEP 3. Check the following connector:

  • C-40 TCM connector
  • C-27 selector lever assembly connector
Check the terminals for a contact status problem and internal short circuit.

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. Check for open circuit and short to ground in the wiring harness between the TCM connector and the selector lever assembly.

  • Between C-40 TCM connector (terminal No.35) and C-27 selector lever assembly connector (terminal No.8)
  • Between C-40 TCM connector (terminal No.43) and C-27 selector lever assembly connector (terminal No.10)
  • Between C-40 TCM connector (terminal No.44) and C-27 selector lever assembly connector (terminal No.9)

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. Check for open circuit in the wiring harness between the selector lever assembly connector and the body ground
Between C-27 selector lever assembly connector (terminal No.7) and body ground

Q. Is the check result normal?
Go to Step 6.
Repair the wiring harness.

STEP 6. Symptom recheck after erasing diagnosis code

Q. Is the check result normal?
Intermittent malfunction
Replace TCM.