B1354

Code

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

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

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

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)

Confirm the code with a scan tool and clear stored codes. Reproduce the code by cycling the ignition to ACC; note whether B1354 returns.
Inspect fuses and the accessory relay visually; replace any blown fuse with correct rating and swap relay with known-good unit if available.
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.
If no voltage at ACC output, test ignition switch operation and connectors for continuity. Repair/replace switch or connector as required.
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.
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.
Inspect and test ground points related to accessory circuit for corrosion and tightness; clean or repair grounds as needed.
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.
After repairs, clear codes and verify functionality over multiple ignition cycles; road test if required to confirm repair.

⚠️ 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

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email