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Home / DTC / U2150 — Navigation ECU Gateway Communication Error

U2150 — Navigation ECU Gateway Communication Error

Detailed page for trouble code U2150.

34,405codes
59brands
11,914generic
22,491specific
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Code

U2150

HUMMER U — Network/User

Navigation ECU Gateway Communication Error

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

Causes

  • Damaged or corroded connector at Navigation ECU or gateway module
  • Broken or shorted CAN bus wiring (CANH/CANL) between Navigation ECU and gateway
  • Missing or intermittent power or ground to the Navigation ECU
  • Faulty CAN transceiver inside the Navigation ECU or gateway module
  • Improper or missing termination resistor on the CAN bus
  • Software/configuration mismatch or corrupted module programming

Symptoms

  • Navigation unit partially or completely inoperative (no maps, no guidance)
  • Other modules reporting communication-related DTCs or network errors
  • Intermittent features tied to navigation (audio prompts, Bluetooth nav prompts) failing
  • Instrument cluster or infotainment showing network warnings
  • Possible no GPS display updates or frozen map screen

What to check

  • Retrieve and record DTCs from all modules with a capable scan tool; note freeze-frame and occurrence count
  • Inspect Navigation ECU and gateway connectors for corrosion, bent pins, water intrusion, or damage
  • Verify battery voltage and ground integrity at the Navigation ECU with ignition ON
  • Measure CANH and CANL voltages at the Navigation ECU connector with key ON (engine off)
  • Measure DC resistance between CANH and CANL with ignition OFF (expected ≈60Ω if two 120Ω terminators present)
  • Check for shorts to battery or chassis ground on CANH/CANL

Signal parameters

  • Vehicle battery nominal supply at module: ~12 V (verify 11–14 V depending on state)
  • CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V
  • CAN bus dominant: CANH ≈ 3.5 V, CANL ≈ 1.5 V (differential ≈2 V)
  • Termination resistance across CANH–CANL with ignition OFF: ≈60 Ω (two 120 Ω terminators in parallel)
  • Typical high-speed CAN data rates: 250 kb/s or 500 kb/s (verify specific vehicle network rate with factory data)
  • No DC short between CANH/CANL and battery or chassis ground

Diagnostic algorithm

  1. Connect a factory-level or equivalent scan tool. Read and log all network DTCs and module communication status; note freeze-frame data and occurrence conditions.
  2. Clear the DTC and see if it returns; determine if fault is intermittent or constant.
  3. Visually inspect Navigation ECU and gateway connectors, wiring harness, and nearby components for damage, corrosion, or water intrusion.
  4. Verify power and ground at the Navigation ECU pins with ignition ON. Repair any low voltage or bad ground before further testing.
  5. With ignition ON (engine off), measure CANH and CANL voltages at the Navigation ECU connector. Compare to expected values in signal_params.
  6. With ignition OFF, measure resistance across CANH–CANL at the same connector. Expect ≈60 Ω. If open or unusually high/low, trace wiring and check terminators.
  7. Use a scan tool to observe live CAN messages. If Navigation messages are absent but other modules communicate, the problem is likely module-specific or wiring to that module.
  8. Use an oscilloscope to inspect waveform quality on CANH and CANL if available. Look for glitching, excessive noise, or missing dominant/recessive transitions.
  9. Isolate the circuit: disconnect the Navigation ECU (with ignition OFF) and verify whether the rest of the bus returns to normal. If disconnecting one module restores network, suspect that module.
  10. Repair any identified wiring faults, damaged connectors, poor grounds, or replace blown fuses. If wiring and power/ground are good and the module still does not communicate, consider module replacement or reprogramming per manufacturer procedures.
  11. After repairs or replacements, reprogram/configure modules as required, clear codes, and verify restoration of normal communication; perform functional test/road test as applicable.

Likely causes

  • Loose or corroded connector or pin at Navigation ECU
  • Open or short in the local CAN wiring harness
  • Failed Navigation ECU CAN transceiver
  • Faulty gateway/module that routes messages between networks
  • Blown fuse or lost power/ground to Navigation ECU

Fault status

⚠️ Status
Navigation ECU Gateway Communication Error — The Navigation module failed to send/receive expected gateway network messages. Stored when the gateway or navigation unit messages time out, are missing, or are corrupted. May be intermittent or permanent depending on wiring, power, or module condition.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U1000 U0100 U0073 U0140 U0121
Repair manuals

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138

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Code

U2150

LAND ROVER U — Network/User

SCP (J1850) Invalid or missing data in the electronic control module rear to allow the steering column to be locked

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

Causes

  • Damaged or corroded connector at Navigation ECU or gateway module
  • Broken or shorted CAN bus wiring (CANH/CANL) between Navigation ECU and gateway
  • Missing or intermittent power or ground to the Navigation ECU
  • Faulty CAN transceiver inside the Navigation ECU or gateway module
  • Improper or missing termination resistor on the CAN bus
  • Software/configuration mismatch or corrupted module programming

Symptoms

  • Navigation unit partially or completely inoperative (no maps, no guidance)
  • Other modules reporting communication-related DTCs or network errors
  • Intermittent features tied to navigation (audio prompts, Bluetooth nav prompts) failing
  • Instrument cluster or infotainment showing network warnings
  • Possible no GPS display updates or frozen map screen

What to check

  • Retrieve and record DTCs from all modules with a capable scan tool; note freeze-frame and occurrence count
  • Inspect Navigation ECU and gateway connectors for corrosion, bent pins, water intrusion, or damage
  • Verify battery voltage and ground integrity at the Navigation ECU with ignition ON
  • Measure CANH and CANL voltages at the Navigation ECU connector with key ON (engine off)
  • Measure DC resistance between CANH and CANL with ignition OFF (expected ≈60Ω if two 120Ω terminators present)
  • Check for shorts to battery or chassis ground on CANH/CANL

Signal parameters

  • Vehicle battery nominal supply at module: ~12 V (verify 11–14 V depending on state)
  • CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V
  • CAN bus dominant: CANH ≈ 3.5 V, CANL ≈ 1.5 V (differential ≈2 V)
  • Termination resistance across CANH–CANL with ignition OFF: ≈60 Ω (two 120 Ω terminators in parallel)
  • Typical high-speed CAN data rates: 250 kb/s or 500 kb/s (verify specific vehicle network rate with factory data)
  • No DC short between CANH/CANL and battery or chassis ground

Diagnostic algorithm

  1. Connect a factory-level or equivalent scan tool. Read and log all network DTCs and module communication status; note freeze-frame data and occurrence conditions.
  2. Clear the DTC and see if it returns; determine if fault is intermittent or constant.
  3. Visually inspect Navigation ECU and gateway connectors, wiring harness, and nearby components for damage, corrosion, or water intrusion.
  4. Verify power and ground at the Navigation ECU pins with ignition ON. Repair any low voltage or bad ground before further testing.
  5. With ignition ON (engine off), measure CANH and CANL voltages at the Navigation ECU connector. Compare to expected values in signal_params.
  6. With ignition OFF, measure resistance across CANH–CANL at the same connector. Expect ≈60 Ω. If open or unusually high/low, trace wiring and check terminators.
  7. Use a scan tool to observe live CAN messages. If Navigation messages are absent but other modules communicate, the problem is likely module-specific or wiring to that module.
  8. Use an oscilloscope to inspect waveform quality on CANH and CANL if available. Look for glitching, excessive noise, or missing dominant/recessive transitions.
  9. Isolate the circuit: disconnect the Navigation ECU (with ignition OFF) and verify whether the rest of the bus returns to normal. If disconnecting one module restores network, suspect that module.
  10. Repair any identified wiring faults, damaged connectors, poor grounds, or replace blown fuses. If wiring and power/ground are good and the module still does not communicate, consider module replacement or reprogramming per manufacturer procedures.
  11. After repairs or replacements, reprogram/configure modules as required, clear codes, and verify restoration of normal communication; perform functional test/road test as applicable.

Likely causes

  • Loose or corroded connector or pin at Navigation ECU
  • Open or short in the local CAN wiring harness
  • Failed Navigation ECU CAN transceiver
  • Faulty gateway/module that routes messages between networks
  • Blown fuse or lost power/ground to Navigation ECU

Fault status

⚠️ Status
Navigation ECU Gateway Communication Error — The Navigation module failed to send/receive expected gateway network messages. Stored when the gateway or navigation unit messages time out, are missing, or are corrupted. May be intermittent or permanent depending on wiring, power, or module condition.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U1000 U0100 U0073 U0140 U0121
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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Code

U2150

Other U — Network/User

SCP (J1850) Invalid Data from REM

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

Causes

  • Damaged or corroded connector at Navigation ECU or gateway module
  • Broken or shorted CAN bus wiring (CANH/CANL) between Navigation ECU and gateway
  • Missing or intermittent power or ground to the Navigation ECU
  • Faulty CAN transceiver inside the Navigation ECU or gateway module
  • Improper or missing termination resistor on the CAN bus
  • Software/configuration mismatch or corrupted module programming

Symptoms

  • Navigation unit partially or completely inoperative (no maps, no guidance)
  • Other modules reporting communication-related DTCs or network errors
  • Intermittent features tied to navigation (audio prompts, Bluetooth nav prompts) failing
  • Instrument cluster or infotainment showing network warnings
  • Possible no GPS display updates or frozen map screen

What to check

  • Retrieve and record DTCs from all modules with a capable scan tool; note freeze-frame and occurrence count
  • Inspect Navigation ECU and gateway connectors for corrosion, bent pins, water intrusion, or damage
  • Verify battery voltage and ground integrity at the Navigation ECU with ignition ON
  • Measure CANH and CANL voltages at the Navigation ECU connector with key ON (engine off)
  • Measure DC resistance between CANH and CANL with ignition OFF (expected ≈60Ω if two 120Ω terminators present)
  • Check for shorts to battery or chassis ground on CANH/CANL

Signal parameters

  • Vehicle battery nominal supply at module: ~12 V (verify 11–14 V depending on state)
  • CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V
  • CAN bus dominant: CANH ≈ 3.5 V, CANL ≈ 1.5 V (differential ≈2 V)
  • Termination resistance across CANH–CANL with ignition OFF: ≈60 Ω (two 120 Ω terminators in parallel)
  • Typical high-speed CAN data rates: 250 kb/s or 500 kb/s (verify specific vehicle network rate with factory data)
  • No DC short between CANH/CANL and battery or chassis ground

Diagnostic algorithm

  1. Connect a factory-level or equivalent scan tool. Read and log all network DTCs and module communication status; note freeze-frame data and occurrence conditions.
  2. Clear the DTC and see if it returns; determine if fault is intermittent or constant.
  3. Visually inspect Navigation ECU and gateway connectors, wiring harness, and nearby components for damage, corrosion, or water intrusion.
  4. Verify power and ground at the Navigation ECU pins with ignition ON. Repair any low voltage or bad ground before further testing.
  5. With ignition ON (engine off), measure CANH and CANL voltages at the Navigation ECU connector. Compare to expected values in signal_params.
  6. With ignition OFF, measure resistance across CANH–CANL at the same connector. Expect ≈60 Ω. If open or unusually high/low, trace wiring and check terminators.
  7. Use a scan tool to observe live CAN messages. If Navigation messages are absent but other modules communicate, the problem is likely module-specific or wiring to that module.
  8. Use an oscilloscope to inspect waveform quality on CANH and CANL if available. Look for glitching, excessive noise, or missing dominant/recessive transitions.
  9. Isolate the circuit: disconnect the Navigation ECU (with ignition OFF) and verify whether the rest of the bus returns to normal. If disconnecting one module restores network, suspect that module.
  10. Repair any identified wiring faults, damaged connectors, poor grounds, or replace blown fuses. If wiring and power/ground are good and the module still does not communicate, consider module replacement or reprogramming per manufacturer procedures.
  11. After repairs or replacements, reprogram/configure modules as required, clear codes, and verify restoration of normal communication; perform functional test/road test as applicable.

Likely causes

  • Loose or corroded connector or pin at Navigation ECU
  • Open or short in the local CAN wiring harness
  • Failed Navigation ECU CAN transceiver
  • Faulty gateway/module that routes messages between networks
  • Blown fuse or lost power/ground to Navigation ECU

Fault status

⚠️ Status
Navigation ECU Gateway Communication Error — The Navigation module failed to send/receive expected gateway network messages. Stored when the gateway or navigation unit messages time out, are missing, or are corrupted. May be intermittent or permanent depending on wiring, power, or module condition.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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U1000 U0100 U0073 U0140 U0121
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