P2809

DTC P2809: Clutch/Shift Switching Solenoid 2, spool stuck

CAUTION
^ If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

DIAGNOSTIC FUNCTION
TC-SST-ECU checks that the clutch/shift switching solenoid 2 is normal.

DESCRIPTIONS OF MONITOR METHODS
The clutch/shift switching solenoid 2 is determined to be seized.

MONITOR EXECUTION
^ Continuous

MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
^ P2733: Clutch/shift switching solenoid 1, spool stuck
^ P2736: Clutch/shift switching solenoid 1 system (Open circuit)
^ P2738: Clutch/shift switching solenoid 1 system (Short to ground)
^ P2739: Clutch/shift switching solenoid 1 system (Short to power supply)
^ P2812: Clutch/shift switching solenoid 2 system (Open circuit)
^ P2814: Clutch/shift switching solenoid 2 system (Short to ground)
^ P2815: Clutch/shift switching solenoid 2 system (Short to power supply)
^ P181E: Clutch 2 (Pressure low range out)
^ P181F: Clutch 2 (Pressure high range out)

Sensor (The sensor below is determined to be normal)
^ Clutch/shift switching solenoid 1

LOGIC FLOW CHARTS (Monitor Sequence)





DTC SET CONDITIONS

Check Conditions
^ Voltage of battery: 8 V or more.
^ Voltage of battery: 16.5 V or less.
^ Engine speed: 650 r/min or more.
^ Time since above engine condition: 1.5 seconds or more.
^ Clutch/shift switching solenoid 2: ON.
^ Clutch cooling flow solenoid: OFF.
^ Clutch/shift pressure solenoid 2: ON.

JUDGMENT CRITERIA
^ Clutch 2 (even) pressure: 1,400 hPa or more, or clutch 2 pressure sensor (even) change: 0, and shift fork position sensor 3 and 4 change: 0. (200 millisecond)

OBD-II DRIVE CYCLE PATTERN
The status with the clutch 2 pressure 1,400 hPa or less, or with the clutch 2 pressure sensor (even) and shift fork position sensor 3 and 4 changed continues for 200 millisecond.

PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
^ Insufficient fluid level
^ Malfunction of clutch/shift switching solenoid 2

DIAGNOSTIC PROCEDURE

Required Special Tools:
^ MB991958 Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827 M.U.T.-III USB Cable
^ MB991910 M.U.T.-III Main Harness A

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q:Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus lines. (Refer to Troubleshooting.) CAN Bus Diagnostics Chart After repairing the CAN bus line, go to Step 2.

STEP 2. Check the fluid.

Q:Is the fluid level proper?
YES : Go to Step 3.
NO : Add the fluid.

STEP 3. Check whether the DTC is reset.
After driving in the 4th gear, check that the DTC is reset.

Q:Is DTC No. P2809 set?
YES : Replace the transaxle assembly.
NO : Intermittent malfunction. (Refer to How to Cope with Intermittent Malfunction.) Troubleshooting Contents