P0776

DTC P0776: Clutch Cooling Flow Solenoid System (Drive current range out)

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 cooling flow solenoid is normal.

DESCRIPTIONS OF MONITOR METHODS
The difference between the actual current of the clutch cooling flow solenoid and target current is large.

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)
^ P0777: Clutch cooling flow solenoid system (Stuck)
^ P0964: Clutch cooling flow solenoid system (Open circuit)
^ P0965: Clutch cooling flow solenoid system (Overvoltage)
^ P0966: Clutch cooling flow solenoid system (Short to ground)
^ P0967: Clutch cooling flow solenoid system (Short to power supply)

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.
^ Engine speed: 650 r/min or more.
^ Time since above engine condition: 1.5 seconds or more.

JUDGMENT CRITERIA [Rationality-high]
^ Calculated current (actual current-target current): 1,000 mA or more. (1 second)

JUDGMENT CRITERIA [Rationality-low]
^ Calculated current (target current-actual current): 1,000 mA or more. (1 second)

OBD-II DRIVE CYCLE PATTERN [RATIONALITY-HIGH]
The value of the calculated current (actual current target current) remains 1,000 mA or less for 1 second.

OBD-II DRIVE CYCLE PATTERN [RATIONALITY-LOW]
The value of the calculated current (target current actual current) remains 1,000 mA or less for 1 second.

PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
^ Malfunction of clutch cooling flow 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.
Leave the engine idle for 15 seconds, and perform a test run of the vehicle. Then check that the DTC is reset.
Q: Is DTC No. P0776 set?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.