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Home / DTC / U017E — Lost Communication With Seat Belt Pretensioner Module A

U017E — Lost Communication With Seat Belt Pretensioner Module A

Detailed page for trouble code U017E.

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Code

U017E

Generic U — Network/User

Lost Communication With Seat Belt Pretensioner Module A

Brand: Generic
Type: U — Network/User
Views: UK: 17 EN: 58 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted CAN bus wiring between pretensioner module and network
  • Faulty or corroded connector at the seat belt pretensioner module
  • Loss of module power or ground (fused power, battery connection, chafe)
  • Failed seat belt pretensioner module
  • Network termination fault (missing or damaged 120 Ω resistors)
  • Intermittent wiring due to chafing or connector movement

Symptoms

  • SRS / airbag warning lamp illuminated
  • Seat belt pretensioner indicator or related warning message
  • Pretensioner may not deploy in a crash (safety risk)
  • Certain safety features disabled or limited
  • Stored U017E and possibly related U0xxx or B0xxx SRS codes
  • No communication with pretensioner module via scan tool

What to check

  • Retrieve all stored codes and freeze frame with a capable scan tool (include SRS/airbag and network pages)
  • Verify ability to communicate with other modules on the same CAN bus (BCM, ECM, SRS ECU)
  • Visually inspect connectors and wiring at seat belt pretensioner module for damage, corrosion, or disconnection
  • Check module power (battery/ignition feed) and ground with DVOM while backprobing (respect SRS safety procedures)
  • Measure CAN_H and CAN_L voltages at the pretensioner module connector with ignition ON
  • Measure resistance across CAN_H and CAN_L with ignition OFF (expect ~60 Ω with two 120 Ω terminators)

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V) during transmission
  • Typical bus resistance between CAN_H and CAN_L with two terminators: ≈ 60 Ω
  • Open circuit on CAN will show very high resistance (OL) between H and L or inconsistent voltage levels
  • Short to battery: CAN line near ≈ 12 V; short to ground: near 0 V

Diagnostic algorithm

  1. Connect an advanced scan tool and record U017E and any related codes (SRS and U-codes). Note freeze frame and mileage.
  2. Attempt to communicate directly with the Seat Belt Pretensioner Module A. Confirm 'no response' or intermittent response.
  3. Check for service actions or crash flags that could disable the module. If crash-data present, follow manufacturer crash procedures.
  4. Visually inspect the pretensioner module connector and harness routing for damage, moisture, pin corrosion, bent pins or aftermarket splices.
  5. With ignition ON, measure module power feed(s) and ground at the connector. Compare to battery voltage and chassis ground. Repair blown fuse, open, or bad ground as needed.
  6. With ignition ON, backprobe CAN_H and CAN_L at the module connector. Verify idle voltages (~2.5 V) and that differential transitions occur when other modules communicate. If voltages are incorrect, trace wiring toward the bus.

Likely causes

  • Damaged connector or wiring at pretensioner module (open/short)
  • Loss of module power or ground
  • CAN bus termination or short to battery/ground on CAN lines
  • Failed pretensioner module
  • Fault in another module on the same CAN network

Fault status

⚠️ Status
Lost communication with Seat Belt Pretensioner Module A — module not responding on CAN bus. May be wiring, power/ground, termination, or module fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-4 hours

Similar codes

U0100 U0121 U0155 U0162 U0164
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Code

U017E

HYUNDAI U — Network/User

Lost Communication With Seatbelt Pretensioner Module “A”

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 15 EN: 23 RU: 14
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted CAN bus wiring between pretensioner module and network
  • Faulty or corroded connector at the seat belt pretensioner module
  • Loss of module power or ground (fused power, battery connection, chafe)
  • Failed seat belt pretensioner module
  • Network termination fault (missing or damaged 120 Ω resistors)
  • Intermittent wiring due to chafing or connector movement

Symptoms

  • SRS / airbag warning lamp illuminated
  • Seat belt pretensioner indicator or related warning message
  • Pretensioner may not deploy in a crash (safety risk)
  • Certain safety features disabled or limited
  • Stored U017E and possibly related U0xxx or B0xxx SRS codes
  • No communication with pretensioner module via scan tool

What to check

  • Retrieve all stored codes and freeze frame with a capable scan tool (include SRS/airbag and network pages)
  • Verify ability to communicate with other modules on the same CAN bus (BCM, ECM, SRS ECU)
  • Visually inspect connectors and wiring at seat belt pretensioner module for damage, corrosion, or disconnection
  • Check module power (battery/ignition feed) and ground with DVOM while backprobing (respect SRS safety procedures)
  • Measure CAN_H and CAN_L voltages at the pretensioner module connector with ignition ON
  • Measure resistance across CAN_H and CAN_L with ignition OFF (expect ~60 Ω with two 120 Ω terminators)

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V) during transmission
  • Typical bus resistance between CAN_H and CAN_L with two terminators: ≈ 60 Ω
  • Open circuit on CAN will show very high resistance (OL) between H and L or inconsistent voltage levels
  • Short to battery: CAN line near ≈ 12 V; short to ground: near 0 V

Diagnostic algorithm

  1. Connect an advanced scan tool and record U017E and any related codes (SRS and U-codes). Note freeze frame and mileage.
  2. Attempt to communicate directly with the Seat Belt Pretensioner Module A. Confirm 'no response' or intermittent response.
  3. Check for service actions or crash flags that could disable the module. If crash-data present, follow manufacturer crash procedures.
  4. Visually inspect the pretensioner module connector and harness routing for damage, moisture, pin corrosion, bent pins or aftermarket splices.
  5. With ignition ON, measure module power feed(s) and ground at the connector. Compare to battery voltage and chassis ground. Repair blown fuse, open, or bad ground as needed.
  6. With ignition ON, backprobe CAN_H and CAN_L at the module connector. Verify idle voltages (~2.5 V) and that differential transitions occur when other modules communicate. If voltages are incorrect, trace wiring toward the bus.

Likely causes

  • Damaged connector or wiring at pretensioner module (open/short)
  • Loss of module power or ground
  • CAN bus termination or short to battery/ground on CAN lines
  • Failed pretensioner module
  • Fault in another module on the same CAN network

Fault status

⚠️ Status
Lost communication with Seat Belt Pretensioner Module A — module not responding on CAN bus. May be wiring, power/ground, termination, or module fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-4 hours

Similar codes

U0100 U0121 U0155 U0162 U0164
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+100 karma for a short comment :)
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Code

U017E

LAND ROVER U — Network/User

Communication lost with the pre-tensioner of seat belt 'A'

Brand: LAND ROVER
Type: U — Network/User
Views: UK: 2 EN: 12 RU: 4
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted CAN bus wiring between pretensioner module and network
  • Faulty or corroded connector at the seat belt pretensioner module
  • Loss of module power or ground (fused power, battery connection, chafe)
  • Failed seat belt pretensioner module
  • Network termination fault (missing or damaged 120 Ω resistors)
  • Intermittent wiring due to chafing or connector movement

Symptoms

  • SRS / airbag warning lamp illuminated
  • Seat belt pretensioner indicator or related warning message
  • Pretensioner may not deploy in a crash (safety risk)
  • Certain safety features disabled or limited
  • Stored U017E and possibly related U0xxx or B0xxx SRS codes
  • No communication with pretensioner module via scan tool

What to check

  • Retrieve all stored codes and freeze frame with a capable scan tool (include SRS/airbag and network pages)
  • Verify ability to communicate with other modules on the same CAN bus (BCM, ECM, SRS ECU)
  • Visually inspect connectors and wiring at seat belt pretensioner module for damage, corrosion, or disconnection
  • Check module power (battery/ignition feed) and ground with DVOM while backprobing (respect SRS safety procedures)
  • Measure CAN_H and CAN_L voltages at the pretensioner module connector with ignition ON
  • Measure resistance across CAN_H and CAN_L with ignition OFF (expect ~60 Ω with two 120 Ω terminators)

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V) during transmission
  • Typical bus resistance between CAN_H and CAN_L with two terminators: ≈ 60 Ω
  • Open circuit on CAN will show very high resistance (OL) between H and L or inconsistent voltage levels
  • Short to battery: CAN line near ≈ 12 V; short to ground: near 0 V

Diagnostic algorithm

  1. Connect an advanced scan tool and record U017E and any related codes (SRS and U-codes). Note freeze frame and mileage.
  2. Attempt to communicate directly with the Seat Belt Pretensioner Module A. Confirm 'no response' or intermittent response.
  3. Check for service actions or crash flags that could disable the module. If crash-data present, follow manufacturer crash procedures.
  4. Visually inspect the pretensioner module connector and harness routing for damage, moisture, pin corrosion, bent pins or aftermarket splices.
  5. With ignition ON, measure module power feed(s) and ground at the connector. Compare to battery voltage and chassis ground. Repair blown fuse, open, or bad ground as needed.
  6. With ignition ON, backprobe CAN_H and CAN_L at the module connector. Verify idle voltages (~2.5 V) and that differential transitions occur when other modules communicate. If voltages are incorrect, trace wiring toward the bus.

Likely causes

  • Damaged connector or wiring at pretensioner module (open/short)
  • Loss of module power or ground
  • CAN bus termination or short to battery/ground on CAN lines
  • Failed pretensioner module
  • Fault in another module on the same CAN network

Fault status

⚠️ Status
Lost communication with Seat Belt Pretensioner Module A — module not responding on CAN bus. May be wiring, power/ground, termination, or module fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-4 hours

Similar codes

U0100 U0121 U0155 U0162 U0164
Workshop Manuals

Repair manuals for LAND ROVER

3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
Buy

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Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Buy

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Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
Buy
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+100 karma for a short comment :)
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