P0826

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

- Malfunction of selector lever assembly (Faulty shift switch assembly)
- Damaged wiring harness and connectors
- Malfunction of TCM

DIAGNOSIS

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

- Item 52: Select switch (up)
- Item 53: Select switch (down)

(Refer to Data List Reference Table Data List Reference Table.)

Q. Is the check result normal?

YES Intermittent malfunction
NO Go to Step 2.
STEP 2. Check shift switch assembly

Refer to Testing and Inspection.

Q. Is the check result normal?

YES Go to Step 3.
NO Replace the selector lever assembly.
STEP 3. Check the following connector:

- C-40 TCM connector
- C-128 Intermediate 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?

YES Go to Step 4.
NO 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?

YES Go to Step 5.
NO 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?

YES Go to Step 6.
NO Repair the wiring harness.
STEP 6. Symptom recheck after erasing diagnostic trouble code

Q. Is the check result normal?

YES Intermittent malfunction
NO Replace TCM.