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Home / DTC / B1240 — Rear washer system pump relay circuit

B1240 — Rear washer system pump relay circuit

Detailed page for trouble code B1240.

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Code

B1240

ALFA ROMEO B — Body

Rear washer system pump relay circuit

Brand: ALFA ROMEO
Type: B — Body
Views: UK: 3 EN: 5 RU: 8
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for washer pump circuit
  • Faulty rear washer pump relay
  • Open or short in wiring harness to relay or pump
  • Poor or corroded connector or ground at pump or relay
  • Faulty rear washer pump motor
  • Faulty body/control module output or software issue

Symptoms

  • Rear washer does not operate when switch is used
  • No relay click audible when rear washer activated
  • Intermittent rear washer operation
  • Blown fuse on repeat attempts to operate washer
  • Possible other body electrical anomalies if control module affected

What to check

  • Check for stored freeze-frame or related faults in body/control module
  • Visually inspect fuse(s) and replace if blown; note if fuse blows again
  • Listen for relay click when rear washer is commanded
  • Inspect relay socket and relay for corrosion, damage, or loose fit
  • Inspect wiring and connectors between relay, pump, fuse, and ground for damage or corrosion
  • Measure voltage at pump connector while washer is commanded (and at relay switch terminal)

Signal parameters

  • Battery voltage at pump/relay power terminal: ~11–14.5 V (12 V nominal).
  • Control/command signal from module to relay coil or output: should show coil activation (12 V or ground side switching depending on design) when washer switch pressed.
  • Relay coil resistance (typical): relay-specific — expect continuity; open coil indicates failed relay.
  • Pump motor current draw when operating: typically 1–5 A (large sustained spike or open circuit indicates fault).
  • Ground circuit resistance from pump to chassis: low ohms (

Diagnostic algorithm

  1. Read and record the code and any additional body-module codes. Clear code and attempt to operate rear washer to see if code returns.
  2. Visually inspect fuses and relays related to washer pump. Replace fuse if blown and note if it immediately blows again.
  3. With a helper operating the rear washer switch, listen for relay click. If no click, probe the relay coil terminals for presence/absence of control voltage when commanded.
  4. Measure battery voltage at the relay feed terminal and at the pump power terminal while commanded. If feed is present but pump terminal has no voltage, suspect relay or wiring between relay and pump.
  5. Check ground continuity at the pump connector. Repair any poor ground connections.
  6. Disconnect pump connector and apply 12 V directly from a fused supply to the pump to verify pump runs and to measure current draw. If pump does not run or draws excessive current, replace pump.
  7. If pump and wiring check OK, remove relay and bench-test relay or swap with identical known-good relay. If swapping fixes issue, replace original relay.
  8. Inspect wiring harness for damage, chafing or corrosion; perform repair/replace wiring or connectors as needed. Use backprobe and wiggle tests to find intermittent faults.
  9. If wiring, relay, fuse, and pump are good but code persists, test the control output from the body/control module for switching function (voltage or ground depending on design). If module output is defective, further module diagnosis or replacement may be required.
  10. After repair, clear codes and verify proper operation of the rear washer through multiple cycles and by road test if needed.

Likely causes

  • Blown or intermittent fuse supplying the rear washer pump
  • Relay contacts stuck or coil open/short
  • Damaged insulation, chafing, or pinched wire to pump causing open/short to ground or battery
  • Corroded connector pins at pump or relay causing intermittent contact
  • Pump motor seized or drawing excessive current causing relay/fuse failure
  • Control module output driver failed or not commanding relay

Fault status

⚠️ Status
Rear washer pump relay circuit fault — open/short/intermittent. Rear washer may not operate.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1241 B1242 B1232 B1200
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Code

B1240

FIAT B — Body

Rear washer system pump relay circuit

Brand: FIAT
Type: B — Body
Views: UK: 2 EN: 5 RU: 6
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for washer pump circuit
  • Faulty rear washer pump relay
  • Open or short in wiring harness to relay or pump
  • Poor or corroded connector or ground at pump or relay
  • Faulty rear washer pump motor
  • Faulty body/control module output or software issue

Symptoms

  • Rear washer does not operate when switch is used
  • No relay click audible when rear washer activated
  • Intermittent rear washer operation
  • Blown fuse on repeat attempts to operate washer
  • Possible other body electrical anomalies if control module affected

What to check

  • Check for stored freeze-frame or related faults in body/control module
  • Visually inspect fuse(s) and replace if blown; note if fuse blows again
  • Listen for relay click when rear washer is commanded
  • Inspect relay socket and relay for corrosion, damage, or loose fit
  • Inspect wiring and connectors between relay, pump, fuse, and ground for damage or corrosion
  • Measure voltage at pump connector while washer is commanded (and at relay switch terminal)

Signal parameters

  • Battery voltage at pump/relay power terminal: ~11–14.5 V (12 V nominal).
  • Control/command signal from module to relay coil or output: should show coil activation (12 V or ground side switching depending on design) when washer switch pressed.
  • Relay coil resistance (typical): relay-specific — expect continuity; open coil indicates failed relay.
  • Pump motor current draw when operating: typically 1–5 A (large sustained spike or open circuit indicates fault).
  • Ground circuit resistance from pump to chassis: low ohms (

Diagnostic algorithm

  1. Read and record the code and any additional body-module codes. Clear code and attempt to operate rear washer to see if code returns.
  2. Visually inspect fuses and relays related to washer pump. Replace fuse if blown and note if it immediately blows again.
  3. With a helper operating the rear washer switch, listen for relay click. If no click, probe the relay coil terminals for presence/absence of control voltage when commanded.
  4. Measure battery voltage at the relay feed terminal and at the pump power terminal while commanded. If feed is present but pump terminal has no voltage, suspect relay or wiring between relay and pump.
  5. Check ground continuity at the pump connector. Repair any poor ground connections.
  6. Disconnect pump connector and apply 12 V directly from a fused supply to the pump to verify pump runs and to measure current draw. If pump does not run or draws excessive current, replace pump.
  7. If pump and wiring check OK, remove relay and bench-test relay or swap with identical known-good relay. If swapping fixes issue, replace original relay.
  8. Inspect wiring harness for damage, chafing or corrosion; perform repair/replace wiring or connectors as needed. Use backprobe and wiggle tests to find intermittent faults.
  9. If wiring, relay, fuse, and pump are good but code persists, test the control output from the body/control module for switching function (voltage or ground depending on design). If module output is defective, further module diagnosis or replacement may be required.
  10. After repair, clear codes and verify proper operation of the rear washer through multiple cycles and by road test if needed.

Likely causes

  • Blown or intermittent fuse supplying the rear washer pump
  • Relay contacts stuck or coil open/short
  • Damaged insulation, chafing, or pinched wire to pump causing open/short to ground or battery
  • Corroded connector pins at pump or relay causing intermittent contact
  • Pump motor seized or drawing excessive current causing relay/fuse failure
  • Control module output driver failed or not commanding relay

Fault status

⚠️ Status
Rear washer pump relay circuit fault — open/short/intermittent. Rear washer may not operate.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1241 B1242 B1232 B1200
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Code

B1240

LAND ROVER B — Body

Start Indicator Mode

Brand: LAND ROVER
Type: B — Body
Views: UK: 3 EN: 8 RU: 8
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for washer pump circuit
  • Faulty rear washer pump relay
  • Open or short in wiring harness to relay or pump
  • Poor or corroded connector or ground at pump or relay
  • Faulty rear washer pump motor
  • Faulty body/control module output or software issue

Symptoms

  • Rear washer does not operate when switch is used
  • No relay click audible when rear washer activated
  • Intermittent rear washer operation
  • Blown fuse on repeat attempts to operate washer
  • Possible other body electrical anomalies if control module affected

What to check

  • Check for stored freeze-frame or related faults in body/control module
  • Visually inspect fuse(s) and replace if blown; note if fuse blows again
  • Listen for relay click when rear washer is commanded
  • Inspect relay socket and relay for corrosion, damage, or loose fit
  • Inspect wiring and connectors between relay, pump, fuse, and ground for damage or corrosion
  • Measure voltage at pump connector while washer is commanded (and at relay switch terminal)

Signal parameters

  • Battery voltage at pump/relay power terminal: ~11–14.5 V (12 V nominal).
  • Control/command signal from module to relay coil or output: should show coil activation (12 V or ground side switching depending on design) when washer switch pressed.
  • Relay coil resistance (typical): relay-specific — expect continuity; open coil indicates failed relay.
  • Pump motor current draw when operating: typically 1–5 A (large sustained spike or open circuit indicates fault).
  • Ground circuit resistance from pump to chassis: low ohms (

Diagnostic algorithm

  1. Read and record the code and any additional body-module codes. Clear code and attempt to operate rear washer to see if code returns.
  2. Visually inspect fuses and relays related to washer pump. Replace fuse if blown and note if it immediately blows again.
  3. With a helper operating the rear washer switch, listen for relay click. If no click, probe the relay coil terminals for presence/absence of control voltage when commanded.
  4. Measure battery voltage at the relay feed terminal and at the pump power terminal while commanded. If feed is present but pump terminal has no voltage, suspect relay or wiring between relay and pump.
  5. Check ground continuity at the pump connector. Repair any poor ground connections.
  6. Disconnect pump connector and apply 12 V directly from a fused supply to the pump to verify pump runs and to measure current draw. If pump does not run or draws excessive current, replace pump.
  7. If pump and wiring check OK, remove relay and bench-test relay or swap with identical known-good relay. If swapping fixes issue, replace original relay.
  8. Inspect wiring harness for damage, chafing or corrosion; perform repair/replace wiring or connectors as needed. Use backprobe and wiggle tests to find intermittent faults.
  9. If wiring, relay, fuse, and pump are good but code persists, test the control output from the body/control module for switching function (voltage or ground depending on design). If module output is defective, further module diagnosis or replacement may be required.
  10. After repair, clear codes and verify proper operation of the rear washer through multiple cycles and by road test if needed.

Likely causes

  • Blown or intermittent fuse supplying the rear washer pump
  • Relay contacts stuck or coil open/short
  • Damaged insulation, chafing, or pinched wire to pump causing open/short to ground or battery
  • Corroded connector pins at pump or relay causing intermittent contact
  • Pump motor seized or drawing excessive current causing relay/fuse failure
  • Control module output driver failed or not commanding relay

Fault status

⚠️ Status
Rear washer pump relay circuit fault — open/short/intermittent. Rear washer may not operate.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1241 B1242 B1232 B1200
Workshop Manuals

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Download
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Code

B1240

Other B — Body

Wiper Washer Rear Pump Relay Circuit Failure

Brand: Other
Type: B — Body
Views: UK: 18 EN: 36 RU: 30
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse for washer pump circuit
  • Faulty rear washer pump relay
  • Open or short in wiring harness to relay or pump
  • Poor or corroded connector or ground at pump or relay
  • Faulty rear washer pump motor
  • Faulty body/control module output or software issue

Symptoms

  • Rear washer does not operate when switch is used
  • No relay click audible when rear washer activated
  • Intermittent rear washer operation
  • Blown fuse on repeat attempts to operate washer
  • Possible other body electrical anomalies if control module affected

What to check

  • Check for stored freeze-frame or related faults in body/control module
  • Visually inspect fuse(s) and replace if blown; note if fuse blows again
  • Listen for relay click when rear washer is commanded
  • Inspect relay socket and relay for corrosion, damage, or loose fit
  • Inspect wiring and connectors between relay, pump, fuse, and ground for damage or corrosion
  • Measure voltage at pump connector while washer is commanded (and at relay switch terminal)

Signal parameters

  • Battery voltage at pump/relay power terminal: ~11–14.5 V (12 V nominal).
  • Control/command signal from module to relay coil or output: should show coil activation (12 V or ground side switching depending on design) when washer switch pressed.
  • Relay coil resistance (typical): relay-specific — expect continuity; open coil indicates failed relay.
  • Pump motor current draw when operating: typically 1–5 A (large sustained spike or open circuit indicates fault).
  • Ground circuit resistance from pump to chassis: low ohms (

Diagnostic algorithm

  1. Read and record the code and any additional body-module codes. Clear code and attempt to operate rear washer to see if code returns.
  2. Visually inspect fuses and relays related to washer pump. Replace fuse if blown and note if it immediately blows again.
  3. With a helper operating the rear washer switch, listen for relay click. If no click, probe the relay coil terminals for presence/absence of control voltage when commanded.
  4. Measure battery voltage at the relay feed terminal and at the pump power terminal while commanded. If feed is present but pump terminal has no voltage, suspect relay or wiring between relay and pump.
  5. Check ground continuity at the pump connector. Repair any poor ground connections.
  6. Disconnect pump connector and apply 12 V directly from a fused supply to the pump to verify pump runs and to measure current draw. If pump does not run or draws excessive current, replace pump.
  7. If pump and wiring check OK, remove relay and bench-test relay or swap with identical known-good relay. If swapping fixes issue, replace original relay.
  8. Inspect wiring harness for damage, chafing or corrosion; perform repair/replace wiring or connectors as needed. Use backprobe and wiggle tests to find intermittent faults.
  9. If wiring, relay, fuse, and pump are good but code persists, test the control output from the body/control module for switching function (voltage or ground depending on design). If module output is defective, further module diagnosis or replacement may be required.
  10. After repair, clear codes and verify proper operation of the rear washer through multiple cycles and by road test if needed.

Likely causes

  • Blown or intermittent fuse supplying the rear washer pump
  • Relay contacts stuck or coil open/short
  • Damaged insulation, chafing, or pinched wire to pump causing open/short to ground or battery
  • Corroded connector pins at pump or relay causing intermittent contact
  • Pump motor seized or drawing excessive current causing relay/fuse failure
  • Control module output driver failed or not commanding relay

Fault status

⚠️ Status
Rear washer pump relay circuit fault — open/short/intermittent. Rear washer may not operate.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1241 B1242 B1232 B1200
Workshop Manuals

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  • 2.2 General notes
  • 2.3 Contact corrosion
  • 2.4 ESD (electrostatic discharge) workplace
  • 2.5 Routing and attachment of lines and wiring
  • 2.6 Identification plates
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Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)

Workshop Manual
Years: 2008–2019 Manual in English Pages: 128 11.1 MB
Short description

Service manual for the 7‑Speed dual‑clutch (DSG) transmissions 0CJ/0CL/0CK/0DN/0DP/0HL fitted to various Audi models. Includes repair information, clutch and gearbox disassembly/assembly, mechatronic and hydraulic system procedures, seals and differential work. Edition 05.2018.

Contents
Key sections:
  • 00 - General, Technical Data
  • 1 Repair Information
  • 1.1 General Repair Information
  • 1.2 Contact Corrosion
  • 1.3 ATF Pump, Deactivating and Draining the Hydraulic Pump Reservoir
  • 2 Rules for Cleanliness when Working on DSG® Transmission
  • 30 - Clutch
  • 1 Clutch
  • 1.1 Overview - Flywheel and Dual Clutch
  • 1.2 Flywheel, Removing and Installing
  • 1.3 Dual Clutch, Removing and Installing
  • 1.4 Input Shaft Seal, Replacing
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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.

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
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Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

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.

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
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Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

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.

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
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