DTC P0819: Notes

DTC P0819 [AW6A-EL, AW6AX-EL] DETECTION CONDITION AND POSSIBLE CAUSES

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
Courtesy of MAZDA MOTORS CORP.

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

Courtesy of MAZDA MOTORS CORP.