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Home / DTC / B1535 — Memory 2 switch circuit

B1535 — Memory 2 switch circuit

Detailed page for trouble code B1535.

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22,461specific
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Code

B1535

ALFA ROMEO B — Body

Memory 2 switch circuit

Brand: ALFA ROMEO
Type: B — Body
Views: UK: 20 EN: 31 RU: 16
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Memory 2 switch (worn contacts or internal failure)
  • Open or chafed wiring in the switch harness (often at seat hinges)
  • Corroded or poorly seated connector at switch or control module
  • Short to ground or short to battery in the switch circuit
  • Blown fuse or defective relay feeding the switch/module
  • Faulty seat control module / body control module (BCM)

Symptoms

  • Memory position 2 does not recall or cannot be stored
  • Memory 2 button has no illumination or feedback when pressed
  • Memory 1 and other functions may still work (isolated to Memory 2)
  • Intermittent or unpredictable memory operation
  • Related stored body module fault(s) and possible warning message in vehicle diagnostics

What to check

  • Read DTCs and freeze-frame/fault occurrence data with a diagnostic scanner
  • Compare operation of Memory 1 vs Memory 2 (isolate to one switch)
  • Visually inspect switch, wiring and connector for damage, corrosion or looseness (pay attention to seat hinge areas)
  • Check relevant fuses and relays for the seat/memory circuit
  • Perform wiggle test on wiring while observing scanner or function
  • Backprobe switch connector and measure reference voltage and signal while operating the switch

Signal parameters

  • Reference voltage: typically 5 V (logic) or 12 V supply depending on vehicle design — present at switch connector with ignition ON
  • Switch output when pressed: voltage should change state (to ground ~0 V or to supply voltage) — module expects a clear change of state
  • Open circuit (switch released): high impedance / no continuity
  • Closed circuit (switch pressed): continuity (low ohms, typically
  • If pulse protocol used, expect digital signal transitions visible on a scope or scan tool

Diagnostic algorithm

  1. Connect a capable scan tool and record B1535 and any related codes and freeze-frame data.
  2. Attempt Memory 2 operation while observing live data/inputs to confirm the module is seeing (or not seeing) the switch change.
  3. Visually inspect the Memory 2 switch, wiring harness, and connectors (check seat hinge and mounting points for chafed wires).
  4. Verify fuses/relays that feed the seat/memory circuit; replace if blown/defective.
  5. Backprobe the switch connector: verify reference voltage present and that the signal changes state when the button is pressed. Note whether the switch grounds or supplies voltage when activated.
  6. Remove switch and measure continuity across its terminals while actuating; replace the switch if contacts do not change state reliably.
  7. If wiring or connector faults are found, repair/replace solderless terminals or wiring as required, then retest.
  8. Clear codes, perform function test and recheck for reoccurrence. If fault persists with correct switch and wiring, consider seat control module/BCM diagnosis or software reflash by dealer.
  9. When performing repairs involving airbags/seats, follow vehicle manufacturer safety procedures (battery disconnect where required).

Likely causes

  • Defective memory switch or internal contact failure
  • Damaged/broken wiring or connector corrosion in harness near seat
  • Intermittent short to ground or battery on the switch signal
  • Faulty connector/fuse feeding the circuit
  • Fault in the seat control module or BCM (less common)

Fault status

⚠️ Status
Memory 2 switch circuit — abnormal signal detected (open, short to ground or short to battery)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1534 B1536 B1537 B1540
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Code

B1535

FIAT B — Body

Memory 2 switch circuit

Brand: FIAT
Type: B — Body
Views: UK: 16 EN: 27 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Memory 2 switch (worn contacts or internal failure)
  • Open or chafed wiring in the switch harness (often at seat hinges)
  • Corroded or poorly seated connector at switch or control module
  • Short to ground or short to battery in the switch circuit
  • Blown fuse or defective relay feeding the switch/module
  • Faulty seat control module / body control module (BCM)

Symptoms

  • Memory position 2 does not recall or cannot be stored
  • Memory 2 button has no illumination or feedback when pressed
  • Memory 1 and other functions may still work (isolated to Memory 2)
  • Intermittent or unpredictable memory operation
  • Related stored body module fault(s) and possible warning message in vehicle diagnostics

What to check

  • Read DTCs and freeze-frame/fault occurrence data with a diagnostic scanner
  • Compare operation of Memory 1 vs Memory 2 (isolate to one switch)
  • Visually inspect switch, wiring and connector for damage, corrosion or looseness (pay attention to seat hinge areas)
  • Check relevant fuses and relays for the seat/memory circuit
  • Perform wiggle test on wiring while observing scanner or function
  • Backprobe switch connector and measure reference voltage and signal while operating the switch

Signal parameters

  • Reference voltage: typically 5 V (logic) or 12 V supply depending on vehicle design — present at switch connector with ignition ON
  • Switch output when pressed: voltage should change state (to ground ~0 V or to supply voltage) — module expects a clear change of state
  • Open circuit (switch released): high impedance / no continuity
  • Closed circuit (switch pressed): continuity (low ohms, typically
  • If pulse protocol used, expect digital signal transitions visible on a scope or scan tool

Diagnostic algorithm

  1. Connect a capable scan tool and record B1535 and any related codes and freeze-frame data.
  2. Attempt Memory 2 operation while observing live data/inputs to confirm the module is seeing (or not seeing) the switch change.
  3. Visually inspect the Memory 2 switch, wiring harness, and connectors (check seat hinge and mounting points for chafed wires).
  4. Verify fuses/relays that feed the seat/memory circuit; replace if blown/defective.
  5. Backprobe the switch connector: verify reference voltage present and that the signal changes state when the button is pressed. Note whether the switch grounds or supplies voltage when activated.
  6. Remove switch and measure continuity across its terminals while actuating; replace the switch if contacts do not change state reliably.
  7. If wiring or connector faults are found, repair/replace solderless terminals or wiring as required, then retest.
  8. Clear codes, perform function test and recheck for reoccurrence. If fault persists with correct switch and wiring, consider seat control module/BCM diagnosis or software reflash by dealer.
  9. When performing repairs involving airbags/seats, follow vehicle manufacturer safety procedures (battery disconnect where required).

Likely causes

  • Defective memory switch or internal contact failure
  • Damaged/broken wiring or connector corrosion in harness near seat
  • Intermittent short to ground or battery on the switch signal
  • Faulty connector/fuse feeding the circuit
  • Fault in the seat control module or BCM (less common)

Fault status

⚠️ Status
Memory 2 switch circuit — abnormal signal detected (open, short to ground or short to battery)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1534 B1536 B1537 B1540
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Code

B1535

MITSUBISHI B — Body

PS.buckle SW SHT.to GND for N.O

Brand: MITSUBISHI
Type: B — Body
Views: UK: 16 EN: 28 RU: 18
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Memory 2 switch (worn contacts or internal failure)
  • Open or chafed wiring in the switch harness (often at seat hinges)
  • Corroded or poorly seated connector at switch or control module
  • Short to ground or short to battery in the switch circuit
  • Blown fuse or defective relay feeding the switch/module
  • Faulty seat control module / body control module (BCM)

Symptoms

  • Memory position 2 does not recall or cannot be stored
  • Memory 2 button has no illumination or feedback when pressed
  • Memory 1 and other functions may still work (isolated to Memory 2)
  • Intermittent or unpredictable memory operation
  • Related stored body module fault(s) and possible warning message in vehicle diagnostics

What to check

  • Read DTCs and freeze-frame/fault occurrence data with a diagnostic scanner
  • Compare operation of Memory 1 vs Memory 2 (isolate to one switch)
  • Visually inspect switch, wiring and connector for damage, corrosion or looseness (pay attention to seat hinge areas)
  • Check relevant fuses and relays for the seat/memory circuit
  • Perform wiggle test on wiring while observing scanner or function
  • Backprobe switch connector and measure reference voltage and signal while operating the switch

Signal parameters

  • Reference voltage: typically 5 V (logic) or 12 V supply depending on vehicle design — present at switch connector with ignition ON
  • Switch output when pressed: voltage should change state (to ground ~0 V or to supply voltage) — module expects a clear change of state
  • Open circuit (switch released): high impedance / no continuity
  • Closed circuit (switch pressed): continuity (low ohms, typically
  • If pulse protocol used, expect digital signal transitions visible on a scope or scan tool

Diagnostic algorithm

  1. Connect a capable scan tool and record B1535 and any related codes and freeze-frame data.
  2. Attempt Memory 2 operation while observing live data/inputs to confirm the module is seeing (or not seeing) the switch change.
  3. Visually inspect the Memory 2 switch, wiring harness, and connectors (check seat hinge and mounting points for chafed wires).
  4. Verify fuses/relays that feed the seat/memory circuit; replace if blown/defective.
  5. Backprobe the switch connector: verify reference voltage present and that the signal changes state when the button is pressed. Note whether the switch grounds or supplies voltage when activated.
  6. Remove switch and measure continuity across its terminals while actuating; replace the switch if contacts do not change state reliably.
  7. If wiring or connector faults are found, repair/replace solderless terminals or wiring as required, then retest.
  8. Clear codes, perform function test and recheck for reoccurrence. If fault persists with correct switch and wiring, consider seat control module/BCM diagnosis or software reflash by dealer.
  9. When performing repairs involving airbags/seats, follow vehicle manufacturer safety procedures (battery disconnect where required).

Likely causes

  • Defective memory switch or internal contact failure
  • Damaged/broken wiring or connector corrosion in harness near seat
  • Intermittent short to ground or battery on the switch signal
  • Faulty connector/fuse feeding the circuit
  • Fault in the seat control module or BCM (less common)

Fault status

⚠️ Status
Memory 2 switch circuit — abnormal signal detected (open, short to ground or short to battery)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1534 B1536 B1537 B1540
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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

B1535

Other B — Body

Memory 2 Switch Circuit Failure

Brand: Other
Type: B — Body
Views: UK: 26 EN: 57 RU: 76
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Memory 2 switch (worn contacts or internal failure)
  • Open or chafed wiring in the switch harness (often at seat hinges)
  • Corroded or poorly seated connector at switch or control module
  • Short to ground or short to battery in the switch circuit
  • Blown fuse or defective relay feeding the switch/module
  • Faulty seat control module / body control module (BCM)

Symptoms

  • Memory position 2 does not recall or cannot be stored
  • Memory 2 button has no illumination or feedback when pressed
  • Memory 1 and other functions may still work (isolated to Memory 2)
  • Intermittent or unpredictable memory operation
  • Related stored body module fault(s) and possible warning message in vehicle diagnostics

What to check

  • Read DTCs and freeze-frame/fault occurrence data with a diagnostic scanner
  • Compare operation of Memory 1 vs Memory 2 (isolate to one switch)
  • Visually inspect switch, wiring and connector for damage, corrosion or looseness (pay attention to seat hinge areas)
  • Check relevant fuses and relays for the seat/memory circuit
  • Perform wiggle test on wiring while observing scanner or function
  • Backprobe switch connector and measure reference voltage and signal while operating the switch

Signal parameters

  • Reference voltage: typically 5 V (logic) or 12 V supply depending on vehicle design — present at switch connector with ignition ON
  • Switch output when pressed: voltage should change state (to ground ~0 V or to supply voltage) — module expects a clear change of state
  • Open circuit (switch released): high impedance / no continuity
  • Closed circuit (switch pressed): continuity (low ohms, typically
  • If pulse protocol used, expect digital signal transitions visible on a scope or scan tool

Diagnostic algorithm

  1. Connect a capable scan tool and record B1535 and any related codes and freeze-frame data.
  2. Attempt Memory 2 operation while observing live data/inputs to confirm the module is seeing (or not seeing) the switch change.
  3. Visually inspect the Memory 2 switch, wiring harness, and connectors (check seat hinge and mounting points for chafed wires).
  4. Verify fuses/relays that feed the seat/memory circuit; replace if blown/defective.
  5. Backprobe the switch connector: verify reference voltage present and that the signal changes state when the button is pressed. Note whether the switch grounds or supplies voltage when activated.
  6. Remove switch and measure continuity across its terminals while actuating; replace the switch if contacts do not change state reliably.
  7. If wiring or connector faults are found, repair/replace solderless terminals or wiring as required, then retest.
  8. Clear codes, perform function test and recheck for reoccurrence. If fault persists with correct switch and wiring, consider seat control module/BCM diagnosis or software reflash by dealer.
  9. When performing repairs involving airbags/seats, follow vehicle manufacturer safety procedures (battery disconnect where required).

Likely causes

  • Defective memory switch or internal contact failure
  • Damaged/broken wiring or connector corrosion in harness near seat
  • Intermittent short to ground or battery on the switch signal
  • Faulty connector/fuse feeding the circuit
  • Fault in the seat control module or BCM (less common)

Fault status

⚠️ Status
Memory 2 switch circuit — abnormal signal detected (open, short to ground or short to battery)
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1534 B1536 B1537 B1540
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