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Home / DTC / U0232 — Lost Communication With Side Obstacle Detection Control Module A

U0232 — Lost Communication With Side Obstacle Detection Control Module A

Detailed page for trouble code U0232.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
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Code

U0232

Generic U — Network/User

Lost Communication With Side Obstacle Detection Control Module A

Brand: Generic
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or disconnected Side Obstacle Detection Control Module A
  • Open, short, or high-resistance wiring between the module and the vehicle CAN/data bus
  • Corroded or loose connector pins at the module or junctions
  • Blown fuse, faulty power feed or missing ground to the module
  • CAN bus physical-layer problems (missing termination, short to power/ground)
  • Module in sleep/low-power state or failed to wake

Symptoms

  • Warning message or indicator for side obstacle/parking assist or blind-spot system
  • Side Obstacle Detection features disabled or showing 'Unavailable'
  • Related driver-assistance systems degraded or inoperative
  • One or more communication-related DTCs present in vehicle network modules
  • Intermittent or permanent loss of radar/sonar objects or alerts
  • No response from the module when queried with a diagnostic scan tool

What to check

  • Retrieve all stored and pending DTCs from all control modules and record freeze-frame data
  • Visually inspect the Side Obstacle Detection module connector(s) for corrosion, bent pins, or water intrusion
  • Verify vehicle battery voltage and charging system; ensure >=12.2 V at rest and 13.5–14.5 V with engine running
  • Check fuses and relays that supply power to the Side Obstacle Detection module
  • Confirm good chassis and module ground(s) with a low-resistance measurement
  • Use a scan tool to query the module and list modules on the CAN bus; note whether the node appears

Signal parameters

  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (differential ≈ 0 V when idle), when active differential ≈ ±2 V
  • CAN bus termination: approximately 60 ohms measured between CAN_H and CAN_L across the whole bus (two 120 Ω in parallel)
  • Typical CAN data rates used by ADAS modules: 250 kbps or 500 kbps (manufacturer dependent) — confirm with wiring diagrams
  • Module power pin: battery voltage ≈ 11–14.5 V (key ON/engine running); ground continuity to chassis < 0.5 Ω ideally
  • Module should respond to diagnostic requests (UDS/CAN) when present — lack of response indicates comm failure

Diagnostic algorithm

  1. Record DTCs: Connect a capable scan tool and record U0232 and any other related network codes from all modules.
  2. Verify battery/charging: Confirm proper battery voltage and charging; low voltage can cause modules to sleep or fail to respond.
  3. Inspect connectors and fuses: Visually inspect the Side Obstacle Detection module connectors, power/ground fuses and relays. Repair or replace as needed.
  4. Check module power and ground: With key ON, measure voltage at the module power pin and check ground continuity to chassis. Repair open circuits.
  5. Confirm module presence on bus: Use the scan tool to list nodes on the CAN network. If the module is absent, proceed to physical-layer checks.
  6. Measure CAN voltages: Probe CAN_H and CAN_L at the module connector with key ON (engine off). Verify idle voltages ~2.5 V and proper differential during activity. If abnormal, trace wiring for shorts/opens.
  7. Check bus termination and continuity: Measure resistance between CAN_H and CAN_L across the whole bus and inspect wiring harness for damage. Unplugging other modules may help isolate the fault.
  8. Perform wiggle and isolation tests: Wiggle harnesses and connectors while monitoring for return of communications or DTC changes to find intermittent faults.
  9. Replace or reflash module only after verifying wiring and power: If wiring and power are confirmed good and the module still does not respond, consider reflashing software or replacing the module per manufacturer procedures. Ensure correct configuration/coding.
  10. Recheck network: After repairs, clear codes and verify that the module appears on the network and that no related DTCs return. Test the Side Obstacle Detection function for proper operation.

Likely causes

  • Damaged or loose CAN wiring or connector at the Side Obstacle Detection module
  • Loss of module power or ground (blown fuse, bad connector)
  • Module not awake or not configured on the network (software issue)
  • CAN transceiver failure in the module or elsewhere on the same bus
  • Corrosion or water intrusion at module connector

Fault status

⚠️ Status
Lost Communication With Side Obstacle Detection Control Module A
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours
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Code

U0232

HYUNDAI U — Network/User

Lost Communication With Side Obstacle Detection Control Module Left

Brand: HYUNDAI
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or disconnected Side Obstacle Detection Control Module A
  • Open, short, or high-resistance wiring between the module and the vehicle CAN/data bus
  • Corroded or loose connector pins at the module or junctions
  • Blown fuse, faulty power feed or missing ground to the module
  • CAN bus physical-layer problems (missing termination, short to power/ground)
  • Module in sleep/low-power state or failed to wake

Symptoms

  • Warning message or indicator for side obstacle/parking assist or blind-spot system
  • Side Obstacle Detection features disabled or showing 'Unavailable'
  • Related driver-assistance systems degraded or inoperative
  • One or more communication-related DTCs present in vehicle network modules
  • Intermittent or permanent loss of radar/sonar objects or alerts
  • No response from the module when queried with a diagnostic scan tool

What to check

  • Retrieve all stored and pending DTCs from all control modules and record freeze-frame data
  • Visually inspect the Side Obstacle Detection module connector(s) for corrosion, bent pins, or water intrusion
  • Verify vehicle battery voltage and charging system; ensure >=12.2 V at rest and 13.5–14.5 V with engine running
  • Check fuses and relays that supply power to the Side Obstacle Detection module
  • Confirm good chassis and module ground(s) with a low-resistance measurement
  • Use a scan tool to query the module and list modules on the CAN bus; note whether the node appears

Signal parameters

  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (differential ≈ 0 V when idle), when active differential ≈ ±2 V
  • CAN bus termination: approximately 60 ohms measured between CAN_H and CAN_L across the whole bus (two 120 Ω in parallel)
  • Typical CAN data rates used by ADAS modules: 250 kbps or 500 kbps (manufacturer dependent) — confirm with wiring diagrams
  • Module power pin: battery voltage ≈ 11–14.5 V (key ON/engine running); ground continuity to chassis < 0.5 Ω ideally
  • Module should respond to diagnostic requests (UDS/CAN) when present — lack of response indicates comm failure

Diagnostic algorithm

  1. Record DTCs: Connect a capable scan tool and record U0232 and any other related network codes from all modules.
  2. Verify battery/charging: Confirm proper battery voltage and charging; low voltage can cause modules to sleep or fail to respond.
  3. Inspect connectors and fuses: Visually inspect the Side Obstacle Detection module connectors, power/ground fuses and relays. Repair or replace as needed.
  4. Check module power and ground: With key ON, measure voltage at the module power pin and check ground continuity to chassis. Repair open circuits.
  5. Confirm module presence on bus: Use the scan tool to list nodes on the CAN network. If the module is absent, proceed to physical-layer checks.
  6. Measure CAN voltages: Probe CAN_H and CAN_L at the module connector with key ON (engine off). Verify idle voltages ~2.5 V and proper differential during activity. If abnormal, trace wiring for shorts/opens.
  7. Check bus termination and continuity: Measure resistance between CAN_H and CAN_L across the whole bus and inspect wiring harness for damage. Unplugging other modules may help isolate the fault.
  8. Perform wiggle and isolation tests: Wiggle harnesses and connectors while monitoring for return of communications or DTC changes to find intermittent faults.
  9. Replace or reflash module only after verifying wiring and power: If wiring and power are confirmed good and the module still does not respond, consider reflashing software or replacing the module per manufacturer procedures. Ensure correct configuration/coding.
  10. Recheck network: After repairs, clear codes and verify that the module appears on the network and that no related DTCs return. Test the Side Obstacle Detection function for proper operation.

Likely causes

  • Damaged or loose CAN wiring or connector at the Side Obstacle Detection module
  • Loss of module power or ground (blown fuse, bad connector)
  • Module not awake or not configured on the network (software issue)
  • CAN transceiver failure in the module or elsewhere on the same bus
  • Corrosion or water intrusion at module connector

Fault status

⚠️ Status
Lost Communication With Side Obstacle Detection Control Module A
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

U0232

LAND ROVER U — Network/User

Lost communication with the obstacle detection control module on the left side

Brand: LAND ROVER
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or disconnected Side Obstacle Detection Control Module A
  • Open, short, or high-resistance wiring between the module and the vehicle CAN/data bus
  • Corroded or loose connector pins at the module or junctions
  • Blown fuse, faulty power feed or missing ground to the module
  • CAN bus physical-layer problems (missing termination, short to power/ground)
  • Module in sleep/low-power state or failed to wake

Symptoms

  • Warning message or indicator for side obstacle/parking assist or blind-spot system
  • Side Obstacle Detection features disabled or showing 'Unavailable'
  • Related driver-assistance systems degraded or inoperative
  • One or more communication-related DTCs present in vehicle network modules
  • Intermittent or permanent loss of radar/sonar objects or alerts
  • No response from the module when queried with a diagnostic scan tool

What to check

  • Retrieve all stored and pending DTCs from all control modules and record freeze-frame data
  • Visually inspect the Side Obstacle Detection module connector(s) for corrosion, bent pins, or water intrusion
  • Verify vehicle battery voltage and charging system; ensure >=12.2 V at rest and 13.5–14.5 V with engine running
  • Check fuses and relays that supply power to the Side Obstacle Detection module
  • Confirm good chassis and module ground(s) with a low-resistance measurement
  • Use a scan tool to query the module and list modules on the CAN bus; note whether the node appears

Signal parameters

  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (differential ≈ 0 V when idle), when active differential ≈ ±2 V
  • CAN bus termination: approximately 60 ohms measured between CAN_H and CAN_L across the whole bus (two 120 Ω in parallel)
  • Typical CAN data rates used by ADAS modules: 250 kbps or 500 kbps (manufacturer dependent) — confirm with wiring diagrams
  • Module power pin: battery voltage ≈ 11–14.5 V (key ON/engine running); ground continuity to chassis < 0.5 Ω ideally
  • Module should respond to diagnostic requests (UDS/CAN) when present — lack of response indicates comm failure

Diagnostic algorithm

  1. Record DTCs: Connect a capable scan tool and record U0232 and any other related network codes from all modules.
  2. Verify battery/charging: Confirm proper battery voltage and charging; low voltage can cause modules to sleep or fail to respond.
  3. Inspect connectors and fuses: Visually inspect the Side Obstacle Detection module connectors, power/ground fuses and relays. Repair or replace as needed.
  4. Check module power and ground: With key ON, measure voltage at the module power pin and check ground continuity to chassis. Repair open circuits.
  5. Confirm module presence on bus: Use the scan tool to list nodes on the CAN network. If the module is absent, proceed to physical-layer checks.
  6. Measure CAN voltages: Probe CAN_H and CAN_L at the module connector with key ON (engine off). Verify idle voltages ~2.5 V and proper differential during activity. If abnormal, trace wiring for shorts/opens.
  7. Check bus termination and continuity: Measure resistance between CAN_H and CAN_L across the whole bus and inspect wiring harness for damage. Unplugging other modules may help isolate the fault.
  8. Perform wiggle and isolation tests: Wiggle harnesses and connectors while monitoring for return of communications or DTC changes to find intermittent faults.
  9. Replace or reflash module only after verifying wiring and power: If wiring and power are confirmed good and the module still does not respond, consider reflashing software or replacing the module per manufacturer procedures. Ensure correct configuration/coding.
  10. Recheck network: After repairs, clear codes and verify that the module appears on the network and that no related DTCs return. Test the Side Obstacle Detection function for proper operation.

Likely causes

  • Damaged or loose CAN wiring or connector at the Side Obstacle Detection module
  • Loss of module power or ground (blown fuse, bad connector)
  • Module not awake or not configured on the network (software issue)
  • CAN transceiver failure in the module or elsewhere on the same bus
  • Corrosion or water intrusion at module connector

Fault status

⚠️ Status
Lost Communication With Side Obstacle Detection Control Module A
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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