Home

Mazdamanuals.com

DTC P0819:00 [TCM (ET6A-EL, ET6AX-EL)]

id0502q9822400

Outline

System malfunction location	M position switch/Up switch/Down switch signal error
Detection condition	• Under the following conditions, any of (1) to (4) conditions occurs for 1 s: ― Engine is running. ― Battery voltage is 8 V or more. ― Transaxle range sensor related DTC is not recorded. (1) M position switch signal is on even though forward oil pressure switch is on in any position other than D position. (2) M position switch signal is off even though up or down switch signal is on in D position. (3) Up switch signal is on even though M position switch signal is off in any position other than D position. (4) Down switch signal is on even though M position switch signal is off in any position other than D position.
Fail-safe	• Inhibits manual mode.
Possible cause	• Body control module (BCM) has detected shift panel (indicator) related DTCs. • Selector lever component connector or terminals malfunction • Selector lever component malfunction ― M position switch malfunction ― Up switch malfunction ― Down switch malfunction • Open circuit in selector lever component ground circuit • Shift panel (indicator) connector or terminals malfunction • Short to ground in any of the following selector lever component circuits ― Signal circuit • Short to power supply in any of the following selector lever component circuits ― Signal circuit • Open circuit in any of the following selector lever component circuits ― Signal circuit • Shift panel (indicator) malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture of the PC function.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY BODY CONTROL MODULE (BCM) DTC • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is a shift panel (indicator) related DTC displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
3		No	Go to the next step.
4	INSPECT SELECTOR LEVER COMPONENT CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT SELECTOR LEVER COMPONENT FOR MALFUNCTION • Inspect the applicable part. (See M POSITION SWITCH INSPECTION [ET6A-EL, ET6AX-EL].) (See UP SWITCH INSPECTION [ET6A-EL, ET6AX-EL].) (See DOWN SWITCH INSPECTION [ET6A-EL, ET6AX-EL].) • Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION.)
6	INSPECT SELECTOR LEVER COMPONENT GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT SHIFT PANEL (INDICATOR) CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	INSPECT SELECTOR LEVER COMPONENT SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	INSPECT SELECTOR LEVER COMPONENT SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification.
10	INSPECT SELECTOR LEVER COMPONENT SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Replace the shift panel (indicator) and perform the repair completion verification. (See INDICATOR REMOVAL/INSTALLATION.)
10		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification	VERIFY DTC TROUBLESHOOTING COMPLETED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC using the M-MDS. (See CLEARING DTC.) • Perform the following procedure to ensure that the DTC has been resolved: 1. Verify that the battery voltage is 8 V or more. 2. Drive the vehicle for 1 s or more under the following condition: • Selector lever position: Except D position 3. Drive the vehicle for 1 s or more under the following conditions: • Selector lever position: D position • Up switch: On 4. Drive the vehicle for 1 s or more under the following conditions: • Selector lever position: D position • Down switch: On • Perform the DTC inspection using the M-MDS. (See DTC INSPECTION.) • Are any DTCs present?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].)
Repair completion verification		No	DTC troubleshooting completed.