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Home / DTC / B1354 — Accessory position 1 circuit

B1354 — Accessory position 1 circuit

Detailed page for trouble code B1354.

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Code

B1354

ALFA ROMEO B — Body

Accessory position 1 circuit

Brand: ALFA ROMEO
Type: B — Body
Views: UK: 4 EN: 6 RU: 5
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the accessory position 1 circuit
  • Blown fuse or faulty accessory relay
  • Poor or corroded connector/terminal at switch, relay or BCM
  • Faulty ignition switch or accessory switch
  • Faulty body control module (BCM) input

Symptoms

  • Accessories (radio, infotainment, some HVAC functions) do not power in ACC position
  • Intermittent accessory power or flickering when key in ACC
  • Accessory circuit fuse blows repeatedly
  • Possible battery drain or inability to switch accessories on/off
  • Related warning or body module messages on instrument panel

What to check

  • Retrieve and record freeze frame / full DTC data with an appropriate scan tool; confirm B1354 and any related codes
  • Visually inspect fuses and accessory relay for damage; check relay operation
  • Check for obvious wiring damage, corrosion or loose connectors at ignition switch, relay, fuse box and BCM
  • Measure voltage at the accessory circuit feed at the ignition switch and at the BCM connector with key OFF and ACC
  • Perform continuity and resistance checks between ignition switch, fuse/relay output and BCM input
  • Disconnect aftermarket accessories and re-test to rule out external loads

Signal parameters

  • Key OFF: accessory feed should be ~0 V (or battery voltage through a pull-down, as specified by manufacturer)
  • Key ACC: accessory feed should be battery voltage (~11.5–14.5 V) at the switch output and at BCM input
  • Typical continuity: low resistance (near 0 Ω) between switch ACC output and accessory fuse/relay input; high resistance (open) to ground except via intended ground points
  • If short to ground: near 0 V at ACC feed even with key in ACC
  • If short to battery: ACC feed shows battery voltage permanently (key off)

Diagnostic algorithm

  1. Confirm the code with a scan tool and clear stored codes. Reproduce the code by cycling the ignition to ACC; note whether B1354 returns.
  2. Inspect fuses and the accessory relay visually; replace any blown fuse with correct rating and swap relay with known-good unit if available.
  3. With the ignition OFF then ACC, measure voltage at the ignition switch ACC output terminal and at the accessory fuse/relay input. Compare readings to expected battery voltage.
  4. If no voltage at ACC output, test ignition switch operation and connectors for continuity. Repair/replace switch or connector as required.
  5. If voltage at switch but not at BCM input, check continuity between switch/relay output and BCM ACC input. Repair any open or high-resistance sections.
  6. If circuit is shorted (voltage low or fuse blows), disconnect accessory loads (radio, amplifier, aftermarket devices) and test again to isolate the shorted device or section.
  7. Inspect and test ground points related to accessory circuit for corrosion and tightness; clean or repair grounds as needed.
  8. If wiring and loads check good and BCM input still not responding correctly, check BCM power/ground and communication lines. If all else verifies, consider BCM internal fault and consult manufacturer procedures before replacement.
  9. After repairs, clear codes and verify functionality over multiple ignition cycles; road test if required to confirm repair.

Likely causes

  • Blown or intermittent fuse feeding ACC circuit
  • Open/loose connector at ignition switch or BCM
  • Damaged wiring harness (pinch, abrasion) on ACC feed
  • Faulty accessory relay contacts or coil
  • Aftermarket accessory improperly wired creating short or excessive load

Fault status

⚠️ Status
Accessory position 1 circuit — open/short/implausible signal detected on ACC input to the body/control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1350 B1351 B1352 B1353 B1355
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Code

B1354

FIAT B — Body

Accessory position 1 circuit

Brand: FIAT
Type: B — Body
Views: UK: 4 EN: 6 RU: 3
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the accessory position 1 circuit
  • Blown fuse or faulty accessory relay
  • Poor or corroded connector/terminal at switch, relay or BCM
  • Faulty ignition switch or accessory switch
  • Faulty body control module (BCM) input

Symptoms

  • Accessories (radio, infotainment, some HVAC functions) do not power in ACC position
  • Intermittent accessory power or flickering when key in ACC
  • Accessory circuit fuse blows repeatedly
  • Possible battery drain or inability to switch accessories on/off
  • Related warning or body module messages on instrument panel

What to check

  • Retrieve and record freeze frame / full DTC data with an appropriate scan tool; confirm B1354 and any related codes
  • Visually inspect fuses and accessory relay for damage; check relay operation
  • Check for obvious wiring damage, corrosion or loose connectors at ignition switch, relay, fuse box and BCM
  • Measure voltage at the accessory circuit feed at the ignition switch and at the BCM connector with key OFF and ACC
  • Perform continuity and resistance checks between ignition switch, fuse/relay output and BCM input
  • Disconnect aftermarket accessories and re-test to rule out external loads

Signal parameters

  • Key OFF: accessory feed should be ~0 V (or battery voltage through a pull-down, as specified by manufacturer)
  • Key ACC: accessory feed should be battery voltage (~11.5–14.5 V) at the switch output and at BCM input
  • Typical continuity: low resistance (near 0 Ω) between switch ACC output and accessory fuse/relay input; high resistance (open) to ground except via intended ground points
  • If short to ground: near 0 V at ACC feed even with key in ACC
  • If short to battery: ACC feed shows battery voltage permanently (key off)

Diagnostic algorithm

  1. Confirm the code with a scan tool and clear stored codes. Reproduce the code by cycling the ignition to ACC; note whether B1354 returns.
  2. Inspect fuses and the accessory relay visually; replace any blown fuse with correct rating and swap relay with known-good unit if available.
  3. With the ignition OFF then ACC, measure voltage at the ignition switch ACC output terminal and at the accessory fuse/relay input. Compare readings to expected battery voltage.
  4. If no voltage at ACC output, test ignition switch operation and connectors for continuity. Repair/replace switch or connector as required.
  5. If voltage at switch but not at BCM input, check continuity between switch/relay output and BCM ACC input. Repair any open or high-resistance sections.
  6. If circuit is shorted (voltage low or fuse blows), disconnect accessory loads (radio, amplifier, aftermarket devices) and test again to isolate the shorted device or section.
  7. Inspect and test ground points related to accessory circuit for corrosion and tightness; clean or repair grounds as needed.
  8. If wiring and loads check good and BCM input still not responding correctly, check BCM power/ground and communication lines. If all else verifies, consider BCM internal fault and consult manufacturer procedures before replacement.
  9. After repairs, clear codes and verify functionality over multiple ignition cycles; road test if required to confirm repair.

Likely causes

  • Blown or intermittent fuse feeding ACC circuit
  • Open/loose connector at ignition switch or BCM
  • Damaged wiring harness (pinch, abrasion) on ACC feed
  • Faulty accessory relay contacts or coil
  • Aftermarket accessory improperly wired creating short or excessive load

Fault status

⚠️ Status
Accessory position 1 circuit — open/short/implausible signal detected on ACC input to the body/control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1350 B1351 B1352 B1353 B1355
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Code

B1354

LAND ROVER B — Body

Right rear - temperature shock absorber motor

Brand: LAND ROVER
Type: B — Body
Views: UK: 4 EN: 6 RU: 6
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the accessory position 1 circuit
  • Blown fuse or faulty accessory relay
  • Poor or corroded connector/terminal at switch, relay or BCM
  • Faulty ignition switch or accessory switch
  • Faulty body control module (BCM) input

Symptoms

  • Accessories (radio, infotainment, some HVAC functions) do not power in ACC position
  • Intermittent accessory power or flickering when key in ACC
  • Accessory circuit fuse blows repeatedly
  • Possible battery drain or inability to switch accessories on/off
  • Related warning or body module messages on instrument panel

What to check

  • Retrieve and record freeze frame / full DTC data with an appropriate scan tool; confirm B1354 and any related codes
  • Visually inspect fuses and accessory relay for damage; check relay operation
  • Check for obvious wiring damage, corrosion or loose connectors at ignition switch, relay, fuse box and BCM
  • Measure voltage at the accessory circuit feed at the ignition switch and at the BCM connector with key OFF and ACC
  • Perform continuity and resistance checks between ignition switch, fuse/relay output and BCM input
  • Disconnect aftermarket accessories and re-test to rule out external loads

Signal parameters

  • Key OFF: accessory feed should be ~0 V (or battery voltage through a pull-down, as specified by manufacturer)
  • Key ACC: accessory feed should be battery voltage (~11.5–14.5 V) at the switch output and at BCM input
  • Typical continuity: low resistance (near 0 Ω) between switch ACC output and accessory fuse/relay input; high resistance (open) to ground except via intended ground points
  • If short to ground: near 0 V at ACC feed even with key in ACC
  • If short to battery: ACC feed shows battery voltage permanently (key off)

Diagnostic algorithm

  1. Confirm the code with a scan tool and clear stored codes. Reproduce the code by cycling the ignition to ACC; note whether B1354 returns.
  2. Inspect fuses and the accessory relay visually; replace any blown fuse with correct rating and swap relay with known-good unit if available.
  3. With the ignition OFF then ACC, measure voltage at the ignition switch ACC output terminal and at the accessory fuse/relay input. Compare readings to expected battery voltage.
  4. If no voltage at ACC output, test ignition switch operation and connectors for continuity. Repair/replace switch or connector as required.
  5. If voltage at switch but not at BCM input, check continuity between switch/relay output and BCM ACC input. Repair any open or high-resistance sections.
  6. If circuit is shorted (voltage low or fuse blows), disconnect accessory loads (radio, amplifier, aftermarket devices) and test again to isolate the shorted device or section.
  7. Inspect and test ground points related to accessory circuit for corrosion and tightness; clean or repair grounds as needed.
  8. If wiring and loads check good and BCM input still not responding correctly, check BCM power/ground and communication lines. If all else verifies, consider BCM internal fault and consult manufacturer procedures before replacement.
  9. After repairs, clear codes and verify functionality over multiple ignition cycles; road test if required to confirm repair.

Likely causes

  • Blown or intermittent fuse feeding ACC circuit
  • Open/loose connector at ignition switch or BCM
  • Damaged wiring harness (pinch, abrasion) on ACC feed
  • Faulty accessory relay contacts or coil
  • Aftermarket accessory improperly wired creating short or excessive load

Fault status

⚠️ Status
Accessory position 1 circuit — open/short/implausible signal detected on ACC input to the body/control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1350 B1351 B1352 B1353 B1355
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Code

B1354

Other B — Body

Ignition Key-In Circuit Short To Ground

Brand: Other
Type: B — Body
Views: UK: 13 EN: 17 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the accessory position 1 circuit
  • Blown fuse or faulty accessory relay
  • Poor or corroded connector/terminal at switch, relay or BCM
  • Faulty ignition switch or accessory switch
  • Faulty body control module (BCM) input

Symptoms

  • Accessories (radio, infotainment, some HVAC functions) do not power in ACC position
  • Intermittent accessory power or flickering when key in ACC
  • Accessory circuit fuse blows repeatedly
  • Possible battery drain or inability to switch accessories on/off
  • Related warning or body module messages on instrument panel

What to check

  • Retrieve and record freeze frame / full DTC data with an appropriate scan tool; confirm B1354 and any related codes
  • Visually inspect fuses and accessory relay for damage; check relay operation
  • Check for obvious wiring damage, corrosion or loose connectors at ignition switch, relay, fuse box and BCM
  • Measure voltage at the accessory circuit feed at the ignition switch and at the BCM connector with key OFF and ACC
  • Perform continuity and resistance checks between ignition switch, fuse/relay output and BCM input
  • Disconnect aftermarket accessories and re-test to rule out external loads

Signal parameters

  • Key OFF: accessory feed should be ~0 V (or battery voltage through a pull-down, as specified by manufacturer)
  • Key ACC: accessory feed should be battery voltage (~11.5–14.5 V) at the switch output and at BCM input
  • Typical continuity: low resistance (near 0 Ω) between switch ACC output and accessory fuse/relay input; high resistance (open) to ground except via intended ground points
  • If short to ground: near 0 V at ACC feed even with key in ACC
  • If short to battery: ACC feed shows battery voltage permanently (key off)

Diagnostic algorithm

  1. Confirm the code with a scan tool and clear stored codes. Reproduce the code by cycling the ignition to ACC; note whether B1354 returns.
  2. Inspect fuses and the accessory relay visually; replace any blown fuse with correct rating and swap relay with known-good unit if available.
  3. With the ignition OFF then ACC, measure voltage at the ignition switch ACC output terminal and at the accessory fuse/relay input. Compare readings to expected battery voltage.
  4. If no voltage at ACC output, test ignition switch operation and connectors for continuity. Repair/replace switch or connector as required.
  5. If voltage at switch but not at BCM input, check continuity between switch/relay output and BCM ACC input. Repair any open or high-resistance sections.
  6. If circuit is shorted (voltage low or fuse blows), disconnect accessory loads (radio, amplifier, aftermarket devices) and test again to isolate the shorted device or section.
  7. Inspect and test ground points related to accessory circuit for corrosion and tightness; clean or repair grounds as needed.
  8. If wiring and loads check good and BCM input still not responding correctly, check BCM power/ground and communication lines. If all else verifies, consider BCM internal fault and consult manufacturer procedures before replacement.
  9. After repairs, clear codes and verify functionality over multiple ignition cycles; road test if required to confirm repair.

Likely causes

  • Blown or intermittent fuse feeding ACC circuit
  • Open/loose connector at ignition switch or BCM
  • Damaged wiring harness (pinch, abrasion) on ACC feed
  • Faulty accessory relay contacts or coil
  • Aftermarket accessory improperly wired creating short or excessive load

Fault status

⚠️ Status
Accessory position 1 circuit — open/short/implausible signal detected on ACC input to the body/control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1350 B1351 B1352 B1353 B1355
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  • 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.

199,00 UAH
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.

199,00 UAH
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.

199,00 UAH
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.

199,00 UAH
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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