Code
U0153
HYUNDAI
U — Network/User
Lost Communication With Side Restraints Control Module Right
Views:
UK: 14
EN: 17
RU: 17
AI status
Completed
Completed
100%
Causes
- Open or intermittent wiring/connectors between right side restraints module and CAN bus
- Faulty right side restraints (SRS) control module
- CAN bus short to battery or ground, high resistance or bus-off condition
- Blown fuse or poor ground related to SRS or network power
- Corroded or damaged connector at the module or gateway
- Software/firmware mismatch or module not programmed/configured
Symptoms
- SRS/Airbag warning lamp illuminated
- Possible SRS system fault messages on instrument cluster or diagnostic tool
- Certain safety features disabled (e.g., side airbag deployment)
- No communication with right side restraints module via scan tool
- Other network errors or related modules reporting communication faults
What to check
- Read and record freeze frame and supplemental codes with a capable scanner (SRS and network)
- Visual inspection of right side restraints module connector and wiring for damage, corrosion or looseness
- Check SRS and vehicle battery voltage and engine ground integrity
- Verify SRS-related fuses and fusible links are intact
- Check CAN bus continuity and resistance between module and gateway/ECU
- Scan for bus-off or excessive error counters on CAN network
Signal parameters
- CAN bus active with correct nominal voltages (~2.5 V idle on both CAN_H/CAN_L relative to ground) and differential signalling present
- Presence of periodic CAN messages from the right side restraints module (module should transmit alive/heartbeat messages)
- No dominant bus fault or continuous error frames on the CAN network
- Battery voltage within normal operating range during communication checks
- SRS module should respond to diagnostic requests from scan tool
Diagnostic algorithm
- Record all codes and clear then re-scan to confirm U0153 reappears.
- Verify battery voltage and perform basic vehicle grounds check; poor supply can cause comm loss.
- Inspect connectors and wiring at the right side restraints control module for corrosion, damage or loose pins; repair as needed.
- Check and verify SRS and related fuses; replace if blown and investigate cause.
- Using a diagnostic scanner, attempt to communicate with the right side restraints module. If no response, check for CAN activity at the module connector with an oscilloscope or CAN tester.
- If CAN activity is absent at the module but present at gateway/other modules, trace continuity of CAN_H and CAN_L between module and gateway; repair open/shorts.
- If CAN activity is present but messages from the module are missing or malformed, consider module fault — verify programming/firmware and replace only if confirmed.
- After repairs, clear codes and perform SRS self-checks. Confirm no new DTCs and that the SRS warning lamp behaves normally.
- If intermittent, perform wiggle tests on wiring with diagnostic tool monitoring to reproduce loss of communication.
- Safety note: Follow manufacturer procedures for disabling the SRS system and battery disconnect times before servicing any airbag components or connectors. If unsure, refer to factory service manual or a qualified technician.
Likely causes
- Loose/disconnected connector at the right side restraints control module
- Damaged CAN high/low wires (chaffing, pinched) between module and gateway
- Faulty right side restraints control module
- Blown SRS or network-related fuse
- Poor ground at module mounting point
Fault status
Status
Lost Communication With Side Restraints Control Module Right — no response from right side SRS module on CAN bus (message timeout or bus-off condition).
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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