Code
B1360
ALFA ROMEO
B — Body
Ignition switch open circuit
Views:
UK: 7
EN: 6
RU: 7
AI status
Completed
Completed
100%
Causes
- Open circuit in ignition switch wiring
- Damaged or corroded ignition switch connector
- Failed ignition switch (worn contacts)
- Blown fuse or fusible link in ignition feed
- Damaged steering column harness (pinched/broken wires)
- Faulty Body/BCM or immobilizer interface (rare)
Symptoms
- Engine will not crank or start when key is turned
- No accessory power in ACC/ON positions (radio, dash lights)
- No change in scan tool ignition switch state when key turned
- Intermittent starting or loss of ignition functions when steering column is moved
- Possible instrument cluster or BCM warnings related to ignition
What to check
- Read stored faults with a diagnostic scanner; note freeze frame and related codes
- Visually inspect ignition switch connector and wiring at steering column for damage, corrosion, or loose pins
- Check fuses and fusible links supplying ignition circuits
- Verify key positions reported by vehicle (scan tool) while turning key
- Perform wiggle test of steering column while observing ignition signal/status with scan tool
- Measure voltage at ignition switch terminals in each key position with a multimeter
Signal parameters
- Key OFF: ignition switch output ≈ 0 V (no continuity to battery feed)
- ACC/ON: ignition switch output ≈ battery voltage (11.5–14.5 V) on ACC/IGN feeds
- START: crank/START feed ≈ battery voltage when engaged
- Continuity: closed switch terminals should show near 0 ohms between battery feed and respective output in ON/START positions
- Open circuit: infinite/very high resistance or no voltage on expected outputs
Diagnostic algorithm
- Record all related DTCs and note when B1360 was set (conditions).
- Inspect fuses and fusible links for ignition/ACC circuits; replace if blown and retest. Do not replace components prematurely.
- Visually inspect connector at ignition switch and wiring through the steering column for damage, corrosion, or disconnected pins. Repair any mechanical damage.
- Using a meter, backprobe the ignition switch connector. With key in OFF/ACC/ON/START, verify expected voltages on each terminal per signal_params. If voltages are present at switch input but absent at switch outputs, suspect the switch.
- If voltages are not present at switch input, trace back to the supply fuse, relay, and battery feed. Repair broken feed wiring or replace blown fuse/relay as required.
- If switch input and outputs behave intermittently, perform a wiggle/cycle test while monitoring with meter/scan tool to reproduce. Intermittent faults often indicate broken wires or internal switch wear.
- Check continuity to the control module (BCM/ECU) input for the ignition signal. Verify connector pins at the module. Replace or repair wiring as needed.
- If wiring and connectors are good but switch outputs are incorrect, replace the ignition switch assembly (follow anti-theft/immobilizer procedure).
- After repair, clear codes and perform functional test: confirm correct voltages, scan tool shows correct key positions, and vehicle starts/restarts reliably. Re-scan to ensure B1360 does not return.
Likely causes
- Worn or failed ignition switch contacts preventing continuity in ON/START positions
- Broken or chafed wire in steering column harness to ignition switch
- Corroded or loose connector at ignition switch or BCM
- Blown supply fuse to ignition switch circuit
- Aftermarket alarm/immobilizer interrupting the ignition feed
Fault status
Status
Ignition switch circuit open — no ignition signal detected. Check ignition switch, wiring and fuses.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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Code
B1360
FIAT
B — Body
Ignition switch open circuit
Views:
UK: 7
EN: 6
RU: 6
AI status
Completed
Completed
100%
Causes
- Open circuit in ignition switch wiring
- Damaged or corroded ignition switch connector
- Failed ignition switch (worn contacts)
- Blown fuse or fusible link in ignition feed
- Damaged steering column harness (pinched/broken wires)
- Faulty Body/BCM or immobilizer interface (rare)
Symptoms
- Engine will not crank or start when key is turned
- No accessory power in ACC/ON positions (radio, dash lights)
- No change in scan tool ignition switch state when key turned
- Intermittent starting or loss of ignition functions when steering column is moved
- Possible instrument cluster or BCM warnings related to ignition
What to check
- Read stored faults with a diagnostic scanner; note freeze frame and related codes
- Visually inspect ignition switch connector and wiring at steering column for damage, corrosion, or loose pins
- Check fuses and fusible links supplying ignition circuits
- Verify key positions reported by vehicle (scan tool) while turning key
- Perform wiggle test of steering column while observing ignition signal/status with scan tool
- Measure voltage at ignition switch terminals in each key position with a multimeter
Signal parameters
- Key OFF: ignition switch output ≈ 0 V (no continuity to battery feed)
- ACC/ON: ignition switch output ≈ battery voltage (11.5–14.5 V) on ACC/IGN feeds
- START: crank/START feed ≈ battery voltage when engaged
- Continuity: closed switch terminals should show near 0 ohms between battery feed and respective output in ON/START positions
- Open circuit: infinite/very high resistance or no voltage on expected outputs
Diagnostic algorithm
- Record all related DTCs and note when B1360 was set (conditions).
- Inspect fuses and fusible links for ignition/ACC circuits; replace if blown and retest. Do not replace components prematurely.
- Visually inspect connector at ignition switch and wiring through the steering column for damage, corrosion, or disconnected pins. Repair any mechanical damage.
- Using a meter, backprobe the ignition switch connector. With key in OFF/ACC/ON/START, verify expected voltages on each terminal per signal_params. If voltages are present at switch input but absent at switch outputs, suspect the switch.
- If voltages are not present at switch input, trace back to the supply fuse, relay, and battery feed. Repair broken feed wiring or replace blown fuse/relay as required.
- If switch input and outputs behave intermittently, perform a wiggle/cycle test while monitoring with meter/scan tool to reproduce. Intermittent faults often indicate broken wires or internal switch wear.
- Check continuity to the control module (BCM/ECU) input for the ignition signal. Verify connector pins at the module. Replace or repair wiring as needed.
- If wiring and connectors are good but switch outputs are incorrect, replace the ignition switch assembly (follow anti-theft/immobilizer procedure).
- After repair, clear codes and perform functional test: confirm correct voltages, scan tool shows correct key positions, and vehicle starts/restarts reliably. Re-scan to ensure B1360 does not return.
Likely causes
- Worn or failed ignition switch contacts preventing continuity in ON/START positions
- Broken or chafed wire in steering column harness to ignition switch
- Corroded or loose connector at ignition switch or BCM
- Blown supply fuse to ignition switch circuit
- Aftermarket alarm/immobilizer interrupting the ignition feed
Fault status
Status
Ignition switch circuit open — no ignition signal detected. Check ignition switch, wiring and fuses.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
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Code
B1360
Other
B — Body
Ignition Run/Acc Circuit Open
Views:
UK: 18
EN: 22
RU: 33
AI status
Completed
Completed
100%
Causes
- Open circuit in ignition switch wiring
- Damaged or corroded ignition switch connector
- Failed ignition switch (worn contacts)
- Blown fuse or fusible link in ignition feed
- Damaged steering column harness (pinched/broken wires)
- Faulty Body/BCM or immobilizer interface (rare)
Symptoms
- Engine will not crank or start when key is turned
- No accessory power in ACC/ON positions (radio, dash lights)
- No change in scan tool ignition switch state when key turned
- Intermittent starting or loss of ignition functions when steering column is moved
- Possible instrument cluster or BCM warnings related to ignition
What to check
- Read stored faults with a diagnostic scanner; note freeze frame and related codes
- Visually inspect ignition switch connector and wiring at steering column for damage, corrosion, or loose pins
- Check fuses and fusible links supplying ignition circuits
- Verify key positions reported by vehicle (scan tool) while turning key
- Perform wiggle test of steering column while observing ignition signal/status with scan tool
- Measure voltage at ignition switch terminals in each key position with a multimeter
Signal parameters
- Key OFF: ignition switch output ≈ 0 V (no continuity to battery feed)
- ACC/ON: ignition switch output ≈ battery voltage (11.5–14.5 V) on ACC/IGN feeds
- START: crank/START feed ≈ battery voltage when engaged
- Continuity: closed switch terminals should show near 0 ohms between battery feed and respective output in ON/START positions
- Open circuit: infinite/very high resistance or no voltage on expected outputs
Diagnostic algorithm
- Record all related DTCs and note when B1360 was set (conditions).
- Inspect fuses and fusible links for ignition/ACC circuits; replace if blown and retest. Do not replace components prematurely.
- Visually inspect connector at ignition switch and wiring through the steering column for damage, corrosion, or disconnected pins. Repair any mechanical damage.
- Using a meter, backprobe the ignition switch connector. With key in OFF/ACC/ON/START, verify expected voltages on each terminal per signal_params. If voltages are present at switch input but absent at switch outputs, suspect the switch.
- If voltages are not present at switch input, trace back to the supply fuse, relay, and battery feed. Repair broken feed wiring or replace blown fuse/relay as required.
- If switch input and outputs behave intermittently, perform a wiggle/cycle test while monitoring with meter/scan tool to reproduce. Intermittent faults often indicate broken wires or internal switch wear.
- Check continuity to the control module (BCM/ECU) input for the ignition signal. Verify connector pins at the module. Replace or repair wiring as needed.
- If wiring and connectors are good but switch outputs are incorrect, replace the ignition switch assembly (follow anti-theft/immobilizer procedure).
- After repair, clear codes and perform functional test: confirm correct voltages, scan tool shows correct key positions, and vehicle starts/restarts reliably. Re-scan to ensure B1360 does not return.
Likely causes
- Worn or failed ignition switch contacts preventing continuity in ON/START positions
- Broken or chafed wire in steering column harness to ignition switch
- Corroded or loose connector at ignition switch or BCM
- Blown supply fuse to ignition switch circuit
- Aftermarket alarm/immobilizer interrupting the ignition feed
Fault status
Status
Ignition switch circuit open — no ignition signal detected. Check ignition switch, wiring and fuses.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
Similar codes
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