P0968

DTC P0968: Shift/Cooling Switching Solenoid System (Open circuit)

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 shift/cooling switching solenoid circuit is normal.

DESCRIPTIONS OF MONITOR METHODS
The shift/cooling switching solenoid circuit is determined to be open.

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)
^ P1852: Shift fork 1 or 2 opposite direction movement
^ P1855: Shift fork 3 or 4 opposite direction movement

Sensor (The sensor below is determined to be normal)
^ Not applicable

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.

JUDGMENT CRITERIA
^ FET (Field Effect Transistor) output: 1 V or more. (220 millisecond)

OBD-II DRIVE CYCLE PATTERN
The FET channel output remains 1 V or less for 220 milliseconds.

PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
^ Malfunction of shift/cooling switching solenoid

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. After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
1. seconds after turning ON the ignition switch, check that the DTC is reset.
Q: Is DTC No. P0968 set?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.