Code No. P0816 Paddle Shift Down Switch System
OPERATION
The paddle shift switch sends downshift signal to the A/T-ECU.
DIAGNOSTIC FUNCTION
A/T-ECU detects that the paddle shift DOWN switch is stuck to ON.
JUDGEMENT 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 A/T-ECU
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STEP 1. Measure the resistance at AT-ECU connector.
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(1)Disconnect the connector, and measure the resistance between terminal PDDW and body earth at the wiring harness side.
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(2)Paddle shift switch: no operation
OK: No continuity
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(3)Paddle shift switch: DOWN
OK: 2 Ω or less
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Q.
Is the check result normal?
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 Go to Step 4.
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 Go to Step 2.
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STEP 2. Paddle shift switch check
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Refer to  .
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Q.
Is the check result normal?
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Go to Step 3.
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Replace the paddle shift switch.
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STEP 3. Check for short to earth in PDDW line between the A/T-ECU connector and the paddle shift switch connector
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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STEP 4. Check whether the diagnosis code is set again.
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- Ignition switch: "LOCK"(OFF) → "ON"
- Check again if the diagnosis code is set.
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Q.
Is diagnosis code No.P0816 set?
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Replace the A/T-ECU.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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