DTC P0819 [AW6A-EL, AW6AX-EL]


id050211802700

DTC P0819

Manual switch/up switch/down switch circuit malfunction (open circuit/short circuit)

DETECTION CONDITION
•  Any of the following conditions are detected for 10 s or more when engine is running:
―  5 V detected at TCM terminals A7 when in any position except D or M range.
―  0 V detected at TCM terminal A7 when 5 V are input to TCM terminal A3 or A4.
Diagnostic support note:
•  The MIL does not illuminate if the TCM detects the above malfunction condition during the first drive cycle.
•  A PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The AT warning light illuminates.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  Selector lever component connector or terminal malfunction
•  Short to GND in wiring harness between selector lever component terminal A and TCM terminal A3
•  Short to GND in wiring harness between selector lever component terminal B and TCM terminal A4
•  Short to GND in wiring harness between selector lever component terminal C and TCM terminal A7
•  Short to power supply in wiring harness between selector lever component terminal A and TCM terminal A3
•  Short to power supply in wiring harness between selector lever component terminal B and TCM terminal A4
•  Short to power supply in wiring harness between selector lever component terminal C and TCM terminal A7
•  M range switch malfunction
•  Up switch malfunction
•  Down switch malfunction.
•  TCM connector or terminal malfunction
•  Open circuit between between selector lever component terminal A and TCM terminal A3
•  Open circuit between between selector lever component terminal B and TCM terminal A4
•  Open circuit between between selector lever component terminal C and TCM terminal A7
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded on the repair order?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT SELECTOR LEVER COMPONENT CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the selector lever component connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 9.
No
Go to the next step.
4
INSPECT M RANGE SWITCH, UP SWITCH OR DOWN SWITCH CIRCUIT FOR SHORT TO GND
•  Turn the ignition switch to the LOCK position.
•  Disconnect the TCM connector.
•  Inspect for continuity between the following circuits:
―  Selector lever component terminal A (wiring harness-side) and body GND
―  Selector lever component terminal B (wiring harness-side) and body GND
―  Selector lever component terminal C (wiring harness-side) and body GND
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 9.
No
Go to the next step.
5
INSPECT M RANGE SWITCH, UP SWITCH AND DOWN SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY
•  Disconnect the TCM connector.
•  Turn the ignition switch to the ON position (engine off).
•  Measure the voltage between the following circuits:
―  Selector lever component terminal A (wiring harness-side) and body GND
―  Selector lever component terminal B (wiring harness-side) and body GND
―  Selector lever component terminal C (wiring harness-side) and body GND
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 9.
No
Go to the next step.
6
INSPECT M RANGE SWITCH, UP SWITCH AND DOWN SWITCH
•  Inspect the selector lever component.
•  Is there any malfunction?
Yes
Replace the selector lever component, then go to Step 9.
No
Go to the next step.
7
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the TCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 9.
No
Go to the next step.
8
INSPECT M RANGE SWITCH, UP SWITCH AND DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT
•  Turn the ignition switch to the LOCK position.
•  Inspect for continuity between the following circuits:
―  Selector lever component terminal A (wiring harness-side) and TCM terminal A3 (wiring harness-side)
―  Selector lever component terminal B (wiring harness-side) and TCM terminal A4 (wiring harness-side)
―  Selector lever component terminal C (wiring harness-side) and TCM terminal A7 (wiring harness-side)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0819 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from the memory using the M-MDS.
•  Drive the vehicle in M range, and change gears by shifting the selector lever (operating the up and down switches).
•  Is same DTC present?
Yes
Replace the TCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.