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DTC P0816: Malfunction of Paddle Shift Down Switch
 
 
 
 
PADDLE SHIFT SWITCH SYSTEM CIRCUIT
Refer to .
 
 
 
 
DIAGNOSTIC FUNCTION
TCM detects that the paddle shift DOWN switch is stuck to ON.
 
 
JUDGMENT CRITERIA
When the paddle shift DOWN switch being ON consecutively for 60 seconds is detected.
 
 
PROBABLE CAUSES
  • Malfunction of paddle shift switch
  • Damaged wiring harness and connectors
  • Malfunction of TCM
 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool data list
Item 55: Paddle switch (down)
OK: The service data changes in response to the paddle shift operation.
Is the check result normal?
Intermittent malfunction
Go to Step 2.
 
STEP 2. Check the following connector:
  • C-131 TCM connector
  • C-315 paddle shift switch connector
  • C-127 intermediate connector
Check the terminals for a contact status problem and internal short circuit.
Is the check result normal?
Go to Step 3.
Repair the damaged connector.
 
STEP 3. Paddle shift switch single unit check
Refer to .
Is the check result normal?
Go to Step 4.
Replace the paddle shift switch.
 
STEP 4. Check for short to ground in the wiring harness between the TCM connector and the paddle shift switch connector
Between C-131 TCM connector (terminal No.21) and C-315 paddle shift switch connector (terminal No.1)
Is the check result normal?
Go to Step 5.
Repair the wiring harness.
 
STEP 5. Symptom recheck after erasing diagnostic trouble code
Is the check result normal?
Intermittent malfunction
Replace TCM.