DTC P0819:00 [AY6A-EL, AY6AX-EL]

id0502k1822400

DTC P0819:00 | Up and down switch to transaxle range correlation
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DETECTION CONDITION | • Conditions: Engine running and TCM communication normal • Circumstances: M position (5V) signal is detected with the shift lever in a position except D position, or M position (0V) signal is detected when the shift lever is in the UP or DOWN position • Time period: Determined after 1 times lasting 10 or more seconds Diagnostic support note: • The MIL does not illuminate. • The AT warning light illuminates. • PENDING CODE is not available. • FREEZE FRAME DATA is available. • The DTC is stored in the TCM memory.
FAIL-SAFE FUNCTION | • Inhibits manual mode control
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 position switch malfunction • Up switch malfunction • Down switch malfunction. • TCM connector or terminal malfunction • Open circuit between selector lever component terminal A and TCM terminal A3 • Open circuit between selector lever component terminal B and TCM terminal A4 • Open circuit between selector lever component terminal C and TCM terminal A7 • TCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 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 SELECTOR LEVER COMPONENT CONNECTOR FOR POOR CONNECTION • Switch the ignition OFF. • 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 POSITION SWITCH, UP SWITCH OR DOWN SWITCH CIRCUIT FOR SHORT TO GND • Switch the ignition OFF. • 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 POSITION SWITCH, UP SWITCH AND DOWN SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY • Disconnect the TCM connector. • Switch the ignition ON. (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 POSITION SWITCH, UP SWITCH AND DOWN SWITCH • Inspect the M position switch, up switch and down switch. (See SELECTOR LEVER COMPONENT INSPECTION.) • Is there any malfunction? | Yes | Replace the selector lever component, then go to Step 9. (See SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION.)
No | Go to the next step.
7 | INSPECT TCM CONNECTOR FOR POOR CONNECTION • Switch the ignition OFF. • 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 POSITION SWITCH, UP SWITCH AND DOWN SWITCH CIRCUIT FOR OPEN CIRCUIT • Switch the ignition OFF. • 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 DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all the disconnected connectors. • Clear the DTC using the M-MDS. • Perform the following procedure to ensure that the DTC has been resolved: 1. Start the engine. 2. Warm up the engine to normal operating temperature. 3. Drive the vehicle in M position, and shift the selector lever (operate up and down switches) between 1GR to 6GR for 10 s or more. • Is the same DTC present? | Yes | Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
No | Go to the next step.
10 | VERIFY NO DTCs ARE PRESENT • Perform the “Reading DTCs Procedure”. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [AY6A-EL, AY6AX-EL].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [AY6A-EL, AY6AX-EL].)
No | DTC troubleshooting completed.