Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / C1243 — BPMV Pump Motor Stalled

C1243 — BPMV Pump Motor Stalled

Detailed page for trouble code C1243.

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

C1243

HUMMER C — Chassis

BPMV Pump Motor Stalled

Brand: HUMMER
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Failed or seized pump motor (internal mechanical failure)
  • Open or shorted wiring to pump motor
  • Corroded or loose connector at pump motor
  • Blown fuse or faulty pump relay
  • Faulty ABS/ESC control module or driver circuit
  • Hydraulic block or valves mechanically locked, preventing pump rotation

Symptoms

  • ABS and/or traction/stability warning lamp illuminated
  • ABS pump does not run or is unusually quiet when stability control activates
  • Reduced or altered brake feel during ABS or ESC events
  • Possible brake warning lamp if combined systems detect failure
  • No pump noise during self-test or when commanded via scan tool

What to check

  • Read and record all stored ABS/ESC fault codes and freeze frame data with a capable scan tool
  • Verify battery voltage (should be ~12–14 V) and good battery condition
  • Visually inspect pump electrical connector for corrosion, bent pins, water intrusion, or loose terminals
  • Check related fuses and pump relay continuity and operation
  • Command pump ON with scan tool while listening and observing for motor operation
  • Back-probe pump power and ground while commanding to verify presence of supply voltage and switching

Signal parameters

  • Supply voltage at pump when commanded: approximately vehicle battery voltage (~12 V); should be present at motor power terminal when activated
  • Control signal: ABS/ESC module typically applies switched/pulsed power to motor — expect voltage switching rather than a steady low-voltage signal during activation
  • Motor winding resistance: finite low resistance (continuity). An open circuit indicates wiring/motor open; a near short may indicate internal winding fault
  • Current behavior: a running pump draws moderate to high current; a stalled motor may draw higher-than-normal current or no current if open/driver-limited. Use clamp meter to verify
  • No voltage at pump when commanded suggests supply/fuse/relay or module driver fault

Diagnostic algorithm

  1. Connect a full-function scan tool, read all ABS/ESC DTCs and clear codes. Attempt to reproduce C1243 and note conditions (ignition state, wheel movement, self-test).
  2. Verify battery charge and system voltage. Low voltage can prevent pump operation; recharge or replace battery if needed before further testing.
  3. Inspect pump connector and wiring harness for damage, corrosion, chafing, or water entry. Repair any wiring issues.
  4. Check fuses and swap/test the pump relay (if externally fused/relayed). Replace suspect items.
  5. With vehicle stationary and wheels chocked, command the ABS pump ON via scan tool while an assistant monitors: listen for pump, feel for vibration, and observe pressure build if possible.
  6. Back-probe power and ground at the pump connector while commanding pump. Confirm battery voltage at the power terminal and a good ground. If voltage is present and pump does not run, suspect motor or mechanical seizure.
  7. Measure motor winding resistance (disconnect connector first). An open circuit => replace motor; very low resistance or shorted winding => replace motor.
  8. If power is absent at connector when commanded, trace wiring back to fuse/relay and ABS module. Check continuity and repair open/short circuits. Test relay and associated circuits.
  9. If wiring and power are good but motor does not run, remove and bench-test pump assembly (apply 12 V briefly with proper safety precautions) to confirm motor stall/seizure. Replace pump/hydraulic unit if it fails bench test.
  10. If bench test pump runs but stalls when installed, inspect ABS hydraulic block/valves for mechanical lock or internal restriction and consider replacing hydraulic assembly or valve block.
  11. If suspected ABS module driver failure and all wiring/pump checks OK, consider module reprogram/repair or replacement per manufacturer guidance.
  12. After repair or component replacement, clear codes, perform required system bleed/calibration procedures, and verify no reoccurrence through road test and scan-tool functional tests.

Likely causes

  • Pump motor bearings seized or rotor locked by debris
  • Open circuit or poor pin contact in pump motor connector
  • Power supply fuse or relay failed
  • ABS module driver transistor failed (no current to motor)
  • Hydraulic side blockage causing excessive load and stall

Fault status

⚠️ Status
BPMV pump motor stalled — ABS/ESC pump failed to operate when commanded. Possible electrical or mechanical pump failure or driver/wiring fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C1240 C1241 C1242 C1244 C1250
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

C1243

HYUNDAI C — Chassis

Front Left(FL) Height Sensor | Height Sensor - Front Left

Brand: HYUNDAI
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Failed or seized pump motor (internal mechanical failure)
  • Open or shorted wiring to pump motor
  • Corroded or loose connector at pump motor
  • Blown fuse or faulty pump relay
  • Faulty ABS/ESC control module or driver circuit
  • Hydraulic block or valves mechanically locked, preventing pump rotation

Symptoms

  • ABS and/or traction/stability warning lamp illuminated
  • ABS pump does not run or is unusually quiet when stability control activates
  • Reduced or altered brake feel during ABS or ESC events
  • Possible brake warning lamp if combined systems detect failure
  • No pump noise during self-test or when commanded via scan tool

What to check

  • Read and record all stored ABS/ESC fault codes and freeze frame data with a capable scan tool
  • Verify battery voltage (should be ~12–14 V) and good battery condition
  • Visually inspect pump electrical connector for corrosion, bent pins, water intrusion, or loose terminals
  • Check related fuses and pump relay continuity and operation
  • Command pump ON with scan tool while listening and observing for motor operation
  • Back-probe pump power and ground while commanding to verify presence of supply voltage and switching

Signal parameters

  • Supply voltage at pump when commanded: approximately vehicle battery voltage (~12 V); should be present at motor power terminal when activated
  • Control signal: ABS/ESC module typically applies switched/pulsed power to motor — expect voltage switching rather than a steady low-voltage signal during activation
  • Motor winding resistance: finite low resistance (continuity). An open circuit indicates wiring/motor open; a near short may indicate internal winding fault
  • Current behavior: a running pump draws moderate to high current; a stalled motor may draw higher-than-normal current or no current if open/driver-limited. Use clamp meter to verify
  • No voltage at pump when commanded suggests supply/fuse/relay or module driver fault

Diagnostic algorithm

  1. Connect a full-function scan tool, read all ABS/ESC DTCs and clear codes. Attempt to reproduce C1243 and note conditions (ignition state, wheel movement, self-test).
  2. Verify battery charge and system voltage. Low voltage can prevent pump operation; recharge or replace battery if needed before further testing.
  3. Inspect pump connector and wiring harness for damage, corrosion, chafing, or water entry. Repair any wiring issues.
  4. Check fuses and swap/test the pump relay (if externally fused/relayed). Replace suspect items.
  5. With vehicle stationary and wheels chocked, command the ABS pump ON via scan tool while an assistant monitors: listen for pump, feel for vibration, and observe pressure build if possible.
  6. Back-probe power and ground at the pump connector while commanding pump. Confirm battery voltage at the power terminal and a good ground. If voltage is present and pump does not run, suspect motor or mechanical seizure.
  7. Measure motor winding resistance (disconnect connector first). An open circuit => replace motor; very low resistance or shorted winding => replace motor.
  8. If power is absent at connector when commanded, trace wiring back to fuse/relay and ABS module. Check continuity and repair open/short circuits. Test relay and associated circuits.
  9. If wiring and power are good but motor does not run, remove and bench-test pump assembly (apply 12 V briefly with proper safety precautions) to confirm motor stall/seizure. Replace pump/hydraulic unit if it fails bench test.
  10. If bench test pump runs but stalls when installed, inspect ABS hydraulic block/valves for mechanical lock or internal restriction and consider replacing hydraulic assembly or valve block.
  11. If suspected ABS module driver failure and all wiring/pump checks OK, consider module reprogram/repair or replacement per manufacturer guidance.
  12. After repair or component replacement, clear codes, perform required system bleed/calibration procedures, and verify no reoccurrence through road test and scan-tool functional tests.

Likely causes

  • Pump motor bearings seized or rotor locked by debris
  • Open circuit or poor pin contact in pump motor connector
  • Power supply fuse or relay failed
  • ABS module driver transistor failed (no current to motor)
  • Hydraulic side blockage causing excessive load and stall

Fault status

⚠️ Status
BPMV pump motor stalled — ABS/ESC pump failed to operate when commanded. Possible electrical or mechanical pump failure or driver/wiring fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C1240 C1241 C1242 C1244 C1250
371

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

HYUNDAI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

C1243

Other C — Chassis

ABS Outlet Valve Coil LR Circuit Open

Brand: Other
Type: C — Chassis
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Failed or seized pump motor (internal mechanical failure)
  • Open or shorted wiring to pump motor
  • Corroded or loose connector at pump motor
  • Blown fuse or faulty pump relay
  • Faulty ABS/ESC control module or driver circuit
  • Hydraulic block or valves mechanically locked, preventing pump rotation

Symptoms

  • ABS and/or traction/stability warning lamp illuminated
  • ABS pump does not run or is unusually quiet when stability control activates
  • Reduced or altered brake feel during ABS or ESC events
  • Possible brake warning lamp if combined systems detect failure
  • No pump noise during self-test or when commanded via scan tool

What to check

  • Read and record all stored ABS/ESC fault codes and freeze frame data with a capable scan tool
  • Verify battery voltage (should be ~12–14 V) and good battery condition
  • Visually inspect pump electrical connector for corrosion, bent pins, water intrusion, or loose terminals
  • Check related fuses and pump relay continuity and operation
  • Command pump ON with scan tool while listening and observing for motor operation
  • Back-probe pump power and ground while commanding to verify presence of supply voltage and switching

Signal parameters

  • Supply voltage at pump when commanded: approximately vehicle battery voltage (~12 V); should be present at motor power terminal when activated
  • Control signal: ABS/ESC module typically applies switched/pulsed power to motor — expect voltage switching rather than a steady low-voltage signal during activation
  • Motor winding resistance: finite low resistance (continuity). An open circuit indicates wiring/motor open; a near short may indicate internal winding fault
  • Current behavior: a running pump draws moderate to high current; a stalled motor may draw higher-than-normal current or no current if open/driver-limited. Use clamp meter to verify
  • No voltage at pump when commanded suggests supply/fuse/relay or module driver fault

Diagnostic algorithm

  1. Connect a full-function scan tool, read all ABS/ESC DTCs and clear codes. Attempt to reproduce C1243 and note conditions (ignition state, wheel movement, self-test).
  2. Verify battery charge and system voltage. Low voltage can prevent pump operation; recharge or replace battery if needed before further testing.
  3. Inspect pump connector and wiring harness for damage, corrosion, chafing, or water entry. Repair any wiring issues.
  4. Check fuses and swap/test the pump relay (if externally fused/relayed). Replace suspect items.
  5. With vehicle stationary and wheels chocked, command the ABS pump ON via scan tool while an assistant monitors: listen for pump, feel for vibration, and observe pressure build if possible.
  6. Back-probe power and ground at the pump connector while commanding pump. Confirm battery voltage at the power terminal and a good ground. If voltage is present and pump does not run, suspect motor or mechanical seizure.
  7. Measure motor winding resistance (disconnect connector first). An open circuit => replace motor; very low resistance or shorted winding => replace motor.
  8. If power is absent at connector when commanded, trace wiring back to fuse/relay and ABS module. Check continuity and repair open/short circuits. Test relay and associated circuits.
  9. If wiring and power are good but motor does not run, remove and bench-test pump assembly (apply 12 V briefly with proper safety precautions) to confirm motor stall/seizure. Replace pump/hydraulic unit if it fails bench test.
  10. If bench test pump runs but stalls when installed, inspect ABS hydraulic block/valves for mechanical lock or internal restriction and consider replacing hydraulic assembly or valve block.
  11. If suspected ABS module driver failure and all wiring/pump checks OK, consider module reprogram/repair or replacement per manufacturer guidance.
  12. After repair or component replacement, clear codes, perform required system bleed/calibration procedures, and verify no reoccurrence through road test and scan-tool functional tests.

Likely causes

  • Pump motor bearings seized or rotor locked by debris
  • Open circuit or poor pin contact in pump motor connector
  • Power supply fuse or relay failed
  • ABS module driver transistor failed (no current to motor)
  • Hydraulic side blockage causing excessive load and stall

Fault status

⚠️ Status
BPMV pump motor stalled — ABS/ESC pump failed to operate when commanded. Possible electrical or mechanical pump failure or driver/wiring fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C1240 C1241 C1242 C1244 C1250
8,876

The library contains 8,876 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

ALFA ROMEO
89
AUDI
1,243
BMW
479
CADILLAC
168
CHEVROLET
456
DAEWOO
75
FIAT
26
GENESIS
207
HUMMER
138
HYUNDAI
371
ISUZU
86
LAND ROVER
320
LEXUS
280
LINCOLN
166
MERCEDES-BENZ
856
MERCURY
296
MITSUBISHI
406
PORSCHE
136
TESLA
58
TOYOTA
2,042
TRIUMPH
131
VOLKSWAGEN
626
VOLVO
221
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .