P0977

DTC P0977: Shift Select Solenoid 2 System (Short to power supply)

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 select solenoid 2 circuit is normal.

DESCRIPTIONS OF MONITOR METHODS
The shift select solenoid 2 circuit is determined to be short to power supply.

PROBABLE CAUSES
^ Malfunction of TC-SST-ECU
^ Malfunction of shift select 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. 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. P0977 set?
YES: Replace the mechatronic assembly.
NO: Intermittent malfunction.