DTC P0819 [AW6A-EL, AW6AX-EL]

id0502j7802700

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
•  M range switch malfunction
•  Up switch malfunction
•  Down switch malfunction.
•  Open circuit in wiring harness between selector lever component terminal A and TCM terminal A3
•  Open circuit in wiring harness between selector lever component terminal B and TCM terminal A4
•  Open circuit in wiring harness between selector lever component terminal C and TCM terminal A7
•  Open circuit in wiring harness between selector lever component terminal D and ground
•  Short to ground in wiring harness between selector lever component terminal A and TCM terminal A3
•  Short to ground in wiring harness between selector lever component terminal B and TCM terminal A4
•  Short to ground in wiring harness between selector lever component terminal C and TCM terminal A7
•  Damaged connector between selector lever component and TCM
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
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 Service 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 VOLTAGE OF M RANGE SWITCH, UP SWITCH, AND DOWN SWITCH CIRCUIT
•  Turn the ignition switch to the ON position. (engine off)
•  Shift the selector lever to any except M range.
•  Inspect for voltage between TCM connector terminals (wiring harness-side)
―  Terminal A7 and ground (M range switch)
―  Terminal A3 and ground (up switch)
―  Terminal A4 and ground (down switch)
•  Is the voltage B+?
Yes
Go to go to Step 10.
No
Go to the next step.
4
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  Disconnect the TCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are terminals normal?
Yes
Go to the next step.
No
Replace the couple component, then go to Step 10.
5
INSPECT SELECTOR LEVER COMPONENT FOR POOR CONNECTION
•  Disconnect the selector lever component connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Are terminals normal?
Yes
Go to the next step.
No
Replace the couple component, then go to Step 10.
6
INSPECT M RANGE SWITCH, UP SWITCH, AND DOWN SWITCH CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between selector lever component terminals (wiring harness-side) and body ground.
―  Terminal C and body ground (M range switch)
―  Terminal A and body ground (up switch)
―  Terminal B and body ground (down switch)
•  Is there continuity?
Yes
Repair or replace the harness, then go to Step 10.
No
Go to the next step.
7
INSPECT M RANGE SWITCH, UP SWITCH, AND DOWN SWITCH
•  Inspect the M range switch, up switch, and down switch.
•  Are the switches normal?
Yes
Go to the next step.
No
Replace the selector lever, then go to Step 10.
(See SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION.)
8
INSPECT M RANGE SWITCH, UP SWITCH, AND DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between selector lever component terminal D (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the harness, then go to Step 10.
9
INSPECT M RANGE SWITCH, UP SWITCH, AND DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between TCM connector terminals and selector lever component terminals (wiring harness-side).
―  Terminal A7 and terminal C (M range switch)
―  Terminal A3 and terminal A (up switch)
―  Terminal A4 and terminal B (down switch)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the harness, then go to the next step.
10
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 the same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AW6A-EL, AW6AX-EL].)
No
DTC troubleshooting completed.