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Home / DTC / U0152 — Lost Communication With Side Restraints Control Module - Left

U0152 — Lost Communication With Side Restraints Control Module - Left

Detailed page for trouble code U0152.

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U0152

Generic U — Network/User

Lost Communication With Side Restraints Control Module - Left

Brand: Generic
Type: U — Network/User
Views: UK: 19 EN: 38 RU: 24
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Loss of power or ground to the left side restraints control module
  • Blown fuse or disabled SRS/airbag power feed
  • Damaged, corroded, or disconnected connector at the module
  • Open, shorted or high-resistance wiring in the CAN/LIN bus or module harness
  • Failed left side restraints control module
  • Network-wide CAN bus fault (short to battery/ground, missing termination)

Symptoms

  • SRS/airbag warning lamp illuminated
  • Seat belt pretensioner or supplemental restraint messages
  • Vehicle may disable certain restraint features
  • Stored communication fault(s) for left side restraints module
  • Possible intermittent comms faults when turning or jouncing vehicle

What to check

  • Use a scan tool to verify U0152 and any related DTCs; note freeze frame and time stamps
  • Attempt to communicate directly with the left side restraints module using OEM scanner
  • Verify battery voltage (key ON) and inspect charging/voltage system for stability
  • Check SRS-related fuses, relays and inertia cutoff switches for continuity and correct voltage
  • Visually inspect connectors and wiring at the left side restraints module for corrosion, damage, or loose pins
  • Perform wiggle/stress test on the harness while monitoring communication for drops

Signal parameters

  • CAN bus typical idle: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive) — verify with meter/scope
  • CAN dominant state: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V during data (scope preferred)
  • Expected bus termination: ~60 ohms across CAN_H and CAN_L (two 120 ohm terminators in parallel)
  • Module supply voltage: near battery voltage (approx. 11–14 V with key ON)
  • Ground continuity:
  • Network traffic: module should respond to diagnostic requests; packets/sec and IDs vary by vehicle

Diagnostic algorithm

  1. Safety first: follow manufacturer SRS disable procedures before unplugging or servicing airbag-related components.
  2. Use a diagnostic scan tool to read all stored codes; record freeze frame and related DTCs from other modules.
  3. Attempt to communicate with the left side restraints module. If communication intermittently succeeds, note conditions when it fails.
  4. Check battery voltage and charging system. Low voltage can cause modules to drop offline.
  5. Inspect SRS-related fuses, relays and any inertia switches; verify power feed at the module connector (key ON).
  6. Inspect the module connector and harness for corrosion, bent pins, water intrusion, or damage; repair as needed.

Likely causes

  • Loose or corroded connector at left side restraints module
  • Missing module power or ground (fuse, wiring, inertia switch)
  • CAN bus open or short near left side module
  • Module internal failure (module not powering up or not responding)

Fault status

⚠️ Status
Lost Communication With Left Side Restraints Control Module — module not responding on vehicle data bus
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0151 U0100 U0121 U0073 U0142 P0562
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Code

U0152

HYUNDAI U — Network/User

Lost Communication With Side Restraints Control Module Left

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 12 EN: 30 RU: 22
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Loss of power or ground to the left side restraints control module
  • Blown fuse or disabled SRS/airbag power feed
  • Damaged, corroded, or disconnected connector at the module
  • Open, shorted or high-resistance wiring in the CAN/LIN bus or module harness
  • Failed left side restraints control module
  • Network-wide CAN bus fault (short to battery/ground, missing termination)

Symptoms

  • SRS/airbag warning lamp illuminated
  • Seat belt pretensioner or supplemental restraint messages
  • Vehicle may disable certain restraint features
  • Stored communication fault(s) for left side restraints module
  • Possible intermittent comms faults when turning or jouncing vehicle

What to check

  • Use a scan tool to verify U0152 and any related DTCs; note freeze frame and time stamps
  • Attempt to communicate directly with the left side restraints module using OEM scanner
  • Verify battery voltage (key ON) and inspect charging/voltage system for stability
  • Check SRS-related fuses, relays and inertia cutoff switches for continuity and correct voltage
  • Visually inspect connectors and wiring at the left side restraints module for corrosion, damage, or loose pins
  • Perform wiggle/stress test on the harness while monitoring communication for drops

Signal parameters

  • CAN bus typical idle: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive) — verify with meter/scope
  • CAN dominant state: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V during data (scope preferred)
  • Expected bus termination: ~60 ohms across CAN_H and CAN_L (two 120 ohm terminators in parallel)
  • Module supply voltage: near battery voltage (approx. 11–14 V with key ON)
  • Ground continuity:
  • Network traffic: module should respond to diagnostic requests; packets/sec and IDs vary by vehicle

Diagnostic algorithm

  1. Safety first: follow manufacturer SRS disable procedures before unplugging or servicing airbag-related components.
  2. Use a diagnostic scan tool to read all stored codes; record freeze frame and related DTCs from other modules.
  3. Attempt to communicate with the left side restraints module. If communication intermittently succeeds, note conditions when it fails.
  4. Check battery voltage and charging system. Low voltage can cause modules to drop offline.
  5. Inspect SRS-related fuses, relays and any inertia switches; verify power feed at the module connector (key ON).
  6. Inspect the module connector and harness for corrosion, bent pins, water intrusion, or damage; repair as needed.

Likely causes

  • Loose or corroded connector at left side restraints module
  • Missing module power or ground (fuse, wiring, inertia switch)
  • CAN bus open or short near left side module
  • Module internal failure (module not powering up or not responding)

Fault status

⚠️ Status
Lost Communication With Left Side Restraints Control Module — module not responding on vehicle data bus
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0151 U0100 U0121 U0073 U0142 P0562
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