Code
U0292
Generic
U — Network/User
Lost Communication With Drive Motor Control Module B
Views:
UK: 17
EN: 24
RU: 24
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance CAN wiring or damaged connector between modules
- Connector corrosion, bent pins, poor pin contact, or water intrusion at module or junction
- Failed Drive Motor Control Module B hardware or internal bus transceiver failure
- Blown fuse, failed power supply, or missing ground for Drive Motor Control Module B
- Bus termination resistor missing or shorted, incorrect termination
- Other module on same CAN bus pulling the bus down (short to ground or supply)
Symptoms
- MIL/Warning lights related to powertrain/electric drive
- Drive motor B disabled or reduced propulsion/torque
- Vehicle enters limp or reduced-power mode
- Loss of features that depend on motor control B (e.g., one motor in dual-motor systems)
- Stored or pending U-codes and no data stream from Drive Motor Control Module B in scanner
- Intermittent faults or module present one key cycle and absent the next
What to check
- Scan all modules; record U0292 plus any related U-codes and freeze-frame data
- Verify battery voltage is stable (12V or system nominal) and charging system health
- Check fuses and relays supplying Drive Motor Control Module B for presence and continuity
- Visually inspect harnesses, connectors, and junctions for damage, corrosion, or water ingress
- Verify module grounds and power circuits for proper voltage and low resistance to chassis/ground
- Check CAN bus activity with a capable scan tool (module list) or an oscilloscope at the module connector
Signal parameters
- CAN idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both near mid-supply)
- CAN dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2 V)
- Differential voltage when active ≈ 1.5–2.5 V depending on transceivers
- Termination: ~60 ohms measured across CAN_H and CAN_L at two-node ends (2 × 120 Ω in parallel)
- Common bus data rates: commonly 125 kb/s, 250 kb/s, 500 kb/s (verify vehicle-specific rate)
- No valid CAN frames from Drive Motor Control Module B when fault present (module may not appear in module list)
Diagnostic algorithm
- Read and record all DTCs and freeze-frame data. Clear codes and attempt to reproduce U0292 to verify persistence.
- Confirm vehicle battery state of charge and system voltage stable. Recharge/maintain battery if low before further testing.
- Inspect fuses, relays, and wiring supplying Drive Motor Control Module B. Verify proper supply voltage and ground at the module connector with key on and engine/drive system in the correct state.
- Use a scan tool to check if Drive Motor Control Module B is present on the network. Note whether it appears intermittently or not at all.
- Visually inspect CAN H/L wires and connector pins for damage, corrosion, bent pins or pushed-out terminals. Repair any damage and re-test.
- Measure CAN bus voltages (H and L) at the Drive Motor Control Module B connector and at a known-good node. Compare to expected signal parameters. Look for stuck-high, stuck-low, or no activity.
- Measure resistance across CAN H and CAN L with power off to confirm ~60 ohm termination. If open or shorted, trace and repair the termination or shorting node.
- If bus has intermittent faults, isolate segments: disconnect the Drive Motor Control Module B connector (with ignition off) and check whether the rest of the network returns to normal. Reconnect and check again to identify if the module or harness is affecting the bus.
- Inspect/repair any damaged wiring, connectors, or grounds. Use proper sealed terminals and dielectric where required. Recheck for communication after repairs.
- If wiring and power/grounds are good but no communication from the module, consider replacing or bench-testing Drive Motor Control Module B per manufacturer procedure. Reprogram/initialize per OEM instructions if replacement occurs.
- After repair, clear codes and perform a road/drive cycle or specified module communication checks to verify the issue is resolved and no new related codes set.
Likely causes
- Damaged or disconnected CAN H/CAN L wires at harness or connector near Drive Motor Control Module B
- Corroded connector pins at the motor control module or at a splice/junction box
- Missing power or ground to the motor control module (fuse, relay, wiring)
- Failed CAN transceiver inside Drive Motor Control Module B
- Incorrect/missing bus termination (open or shorted 60 ohm) or a shorted node on the bus
Fault status
Status
Lost communication with Drive Motor Control Module B — module not responding on CAN network; may be intermittent or continuous. Check power, ground, CAN H/CAN L wiring, connectors, and module presence on bus before replacing components.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
U0292
HYUNDAI
U — Network/User
Lost Communication With Drive Motor Control Module “B”
Views:
UK: 12
EN: 13
RU: 14
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance CAN wiring or damaged connector between modules
- Connector corrosion, bent pins, poor pin contact, or water intrusion at module or junction
- Failed Drive Motor Control Module B hardware or internal bus transceiver failure
- Blown fuse, failed power supply, or missing ground for Drive Motor Control Module B
- Bus termination resistor missing or shorted, incorrect termination
- Other module on same CAN bus pulling the bus down (short to ground or supply)
Symptoms
- MIL/Warning lights related to powertrain/electric drive
- Drive motor B disabled or reduced propulsion/torque
- Vehicle enters limp or reduced-power mode
- Loss of features that depend on motor control B (e.g., one motor in dual-motor systems)
- Stored or pending U-codes and no data stream from Drive Motor Control Module B in scanner
- Intermittent faults or module present one key cycle and absent the next
What to check
- Scan all modules; record U0292 plus any related U-codes and freeze-frame data
- Verify battery voltage is stable (12V or system nominal) and charging system health
- Check fuses and relays supplying Drive Motor Control Module B for presence and continuity
- Visually inspect harnesses, connectors, and junctions for damage, corrosion, or water ingress
- Verify module grounds and power circuits for proper voltage and low resistance to chassis/ground
- Check CAN bus activity with a capable scan tool (module list) or an oscilloscope at the module connector
Signal parameters
- CAN idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both near mid-supply)
- CAN dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2 V)
- Differential voltage when active ≈ 1.5–2.5 V depending on transceivers
- Termination: ~60 ohms measured across CAN_H and CAN_L at two-node ends (2 × 120 Ω in parallel)
- Common bus data rates: commonly 125 kb/s, 250 kb/s, 500 kb/s (verify vehicle-specific rate)
- No valid CAN frames from Drive Motor Control Module B when fault present (module may not appear in module list)
Diagnostic algorithm
- Read and record all DTCs and freeze-frame data. Clear codes and attempt to reproduce U0292 to verify persistence.
- Confirm vehicle battery state of charge and system voltage stable. Recharge/maintain battery if low before further testing.
- Inspect fuses, relays, and wiring supplying Drive Motor Control Module B. Verify proper supply voltage and ground at the module connector with key on and engine/drive system in the correct state.
- Use a scan tool to check if Drive Motor Control Module B is present on the network. Note whether it appears intermittently or not at all.
- Visually inspect CAN H/L wires and connector pins for damage, corrosion, bent pins or pushed-out terminals. Repair any damage and re-test.
- Measure CAN bus voltages (H and L) at the Drive Motor Control Module B connector and at a known-good node. Compare to expected signal parameters. Look for stuck-high, stuck-low, or no activity.
- Measure resistance across CAN H and CAN L with power off to confirm ~60 ohm termination. If open or shorted, trace and repair the termination or shorting node.
- If bus has intermittent faults, isolate segments: disconnect the Drive Motor Control Module B connector (with ignition off) and check whether the rest of the network returns to normal. Reconnect and check again to identify if the module or harness is affecting the bus.
- Inspect/repair any damaged wiring, connectors, or grounds. Use proper sealed terminals and dielectric where required. Recheck for communication after repairs.
- If wiring and power/grounds are good but no communication from the module, consider replacing or bench-testing Drive Motor Control Module B per manufacturer procedure. Reprogram/initialize per OEM instructions if replacement occurs.
- After repair, clear codes and perform a road/drive cycle or specified module communication checks to verify the issue is resolved and no new related codes set.
Likely causes
- Damaged or disconnected CAN H/CAN L wires at harness or connector near Drive Motor Control Module B
- Corroded connector pins at the motor control module or at a splice/junction box
- Missing power or ground to the motor control module (fuse, relay, wiring)
- Failed CAN transceiver inside Drive Motor Control Module B
- Incorrect/missing bus termination (open or shorted 60 ohm) or a shorted node on the bus
Fault status
Status
Lost communication with Drive Motor Control Module B — module not responding on CAN network; may be intermittent or continuous. Check power, ground, CAN H/CAN L wiring, connectors, and module presence on bus before replacing components.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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