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SRS AIR BAG DIAGNOSIS TSB Revision SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 52B-391 DTC U0020: CAN-B Bus Off Performance
DTC U0021: CAN-B Bus(H1) Circuit Open
DTC U0022: CAN-B Bus(H1) Shorted to Circuit Ground
DTC U0023: CAN-B Bus(H1) Shorted to Circuit Power Supply
DTC U0024: CAN-B Bus(L0) Circuit Open
DTC U0025: CAN-B Bus(L0) Shorted to Circuit Ground
DTC U0026: CAN-B Bus(L0) Shorted to Circuit Power Supply CAUTION • If the DTC U0020, U0021, U0022, U0023, U0024, U0025, U0026 is set in the occupant • When replacing the ECU, always check that the communication circuit is normal. . DTC SET CONDITIONS If the CAN-B circuit malfunction is present, the occu- . JUDGMENT CRITERIA Because of the CAN-B bus circuit malfunction, if . TROUBLESHOOTING HINTS The CAN bus line may be defective DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicles Communication Interface (V.C.I.) • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system) STEP 1. Using scan tool MB991958, diagnose the CAN bus YES : Go to Step 2. ). |