Code
B1536
ALFA ROMEO
B — Body
Memory 2 switch circuit open
Views:
UK: 3
EN: 8
RU: 7
AI status
Completed
Completed
100%
Causes
- Open or broken wiring in the Memory 2 switch circuit
- Faulty Memory 2 switch (mechanical or internal open)
- Poor or corroded connector or pin at the switch or body control module (BCM)
- Blown fuse or intermediate fuse link supplying the switch circuit
- Faulty BCM or input circuit failure
- Aftermarket equipment or wiring damage affecting the circuit
Symptoms
- Memory 2 position will not store or recall
- Memory-related control switch (position 2) not responding
- Possible stored fault lamp or message in body module diagnostics
- Intermittent operation of memory 2 function
- Other memory positions may still work (depending on wiring/configuration)
What to check
- Confirm customer complaint and when fault occurs (ignition on, ignition off, key cycles)
- Read live data/inputs from body control module for Memory switch states
- Check relevant fuses for continuity and correct fuse value
- Inspect switch and harness connectors for corrosion, damage, or loose pins
- Measure voltage at the switch connector with ignition ON and while actuating the switch
- Perform continuity check from switch terminal to BCM input pin with connectors disconnected
Signal parameters
- Ignition ON: expected reference supply (typically battery voltage) present at the switch supply pin
- Switch closed: BCM input should see a change (either near 0 V if switch grounds the line, or near battery voltage if switch supplies +12 V) — vehicle-specific
- Switch open: BCM input typically shows the opposite state (open circuit or pull-up/pull-down level)
- Resistance through closed switch: near 0 Ω (low ohms); open switch: infinite/OL
- No voltage or OL on both supply and signal pins indicates open or blown fuse
Diagnostic algorithm
- Verify DTC presence and freeze frame data using a diagnostic scanner. Note ignition state and any related DTCs.
- Visually inspect the Memory 2 switch, its connector and harness for damage, corrosion, or water ingress. Repair or clean as needed.
- Check fuses and any in-line links that feed the memory switch circuit. Replace any blown fuses and retest.
- With ignition ON, measure voltage at the switch supply terminal and the switch signal terminal. Compare to known good behavior (press/release switch and observe change).
- If no change, disconnect the switch and check continuity between the switch signal terminal and the BCM pin using the wiring diagram to identify correct pins. Repair any open wiring.
- If wiring is good and switch shows open when actuated, bench-test or replace the switch and retest operation.
- If switch and wiring are good, backprobe the BCM input while actuating the switch. If no correct signal at the BCM, suspect BCM input failure; check for software updates or consult manufacturer procedures.
- After repair, clear DTCs, cycle ignition and perform function test to confirm Memory 2 operates and code does not return.
- Document repairs and advise customer of any intermittent wiring locations repaired (e.g., seat base, harness) to monitor for reoccurrence.
Likely causes
- Connector at the Memory 2 switch corroded or with bent pins
- Switch contacts worn or failed (common with heavy use)
- Broken wire at a harness flex point (door hinge, seat base)
- Open trace or connector at the BCM input
- Blown fuse supplying the memory switches
Fault status
Status
Memory 2 switch circuit open — open/unresponsive circuit detected between Memory 2 switch and control module.
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
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