Code
B1617
MERCEDES-BENZ
B — Body
Part E19/1 (Left license plate lamp) is defective
Views:
UK: 11
EN: 19
RU: 11
AI status
Completed
Completed
100%
Causes
- Burnt or failed bulb / LED module in left license plate lamp (E19/1)
- Corroded, loose or damaged connector at the lamp
- Open circuit or short in the wiring between lamp and body control module (BCM) / SAM
- Faulty ground connection at the lamp
- Defective BCM / SAM output or internal driver for the lamp
- Intermittent contact caused by moisture or physical damage
Symptoms
- Left license plate lamp not illuminated
- Possible asymmetric lighting at rear of vehicle
- Bulb out warning or dash message (depending on model)
- DTC stored and possibly current/faulty lamp indicator in diagnostics
What to check
- Visually inspect the left license plate lamp for damage, moisture or discoloration
- Verify whether the lamp lights when switched on (parking lights/DRL as applicable)
- Inspect connector for corrosion, bent pins, water ingress or loose fit
- Check fuse(s) related to exterior lamps (refer to vehicle manual)
- Scan BCM/SAM for stored faults and live data on lamp output
- Measure supply voltage and ground at the lamp connector with ignition on
Signal parameters
- Battery voltage at lamp positive pin (expected ~11–14 V with ignition/parking lights on)
- Voltage drop between lamp positive and ground
- Continuity / resistance of lamp filament or LED module (ohms)
- Ground resistance to chassis
- BCM/SAM lamp output status (on/off) and diagnostic status bits
Diagnostic algorithm
- Use a scan tool to read fault memory and confirm B1617 is present; note freeze frame / run conditions.
- Visually inspect lamp E19/1 for physical damage, moisture, or loose mounting; remove lamp to inspect bulb/LED.
- With lamp removed, test the lamp externally on a known good 12 V supply to confirm lamp functionality.
- With ignition and lamps ON, measure voltage at the vehicle connector: verify battery voltage at the supply pin and good ground at ground pin.
- If supply voltage is present and lamp works externally, check connector continuity and wiring back to BCM/SAM for opens or shorts (use back-probing or disconnect harness and measure).
- If wiring checks OK but lamp still not powered when commanded, monitor BCM/SAM output status with a diagnostic tool while commanding the lamp on/off; if output does not change, suspect BCM/SAM driver fault.
- Repair or replace failed component: socket/connector cleaning or replacement, repair/replace damaged wiring, replace lamp module if faulty.
- After repair, clear DTCs, verify lamp operation and perform road/ignition cycles to ensure DTC does not return.
- Safety note: avoid shorting terminals; disconnect battery if performing extensive wiring repairs or module replacement per manufacturer procedure.
Likely causes
- Failed lamp unit (most common)
- Corroded socket/connector or poor pin contact
- Broken wire near lamp or in harness junction
- Failed lamp driver in BCM/SAM
Fault status
Status
Left license plate lamp (E19/1) defective — lamp circuit malfunction detected (open/short/driver failure).
Repair difficulty: Easy
Diagnostic time: 0.3-1.0 hours
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Code
B1617
MITSUBISHI
B — Body
Roll rate sensor failure
Views:
UK: 7
EN: 17
RU: 12
AI status
Completed
Completed
100%
Causes
- Burnt or failed bulb / LED module in left license plate lamp (E19/1)
- Corroded, loose or damaged connector at the lamp
- Open circuit or short in the wiring between lamp and body control module (BCM) / SAM
- Faulty ground connection at the lamp
- Defective BCM / SAM output or internal driver for the lamp
- Intermittent contact caused by moisture or physical damage
Symptoms
- Left license plate lamp not illuminated
- Possible asymmetric lighting at rear of vehicle
- Bulb out warning or dash message (depending on model)
- DTC stored and possibly current/faulty lamp indicator in diagnostics
What to check
- Visually inspect the left license plate lamp for damage, moisture or discoloration
- Verify whether the lamp lights when switched on (parking lights/DRL as applicable)
- Inspect connector for corrosion, bent pins, water ingress or loose fit
- Check fuse(s) related to exterior lamps (refer to vehicle manual)
- Scan BCM/SAM for stored faults and live data on lamp output
- Measure supply voltage and ground at the lamp connector with ignition on
Signal parameters
- Battery voltage at lamp positive pin (expected ~11–14 V with ignition/parking lights on)
- Voltage drop between lamp positive and ground
- Continuity / resistance of lamp filament or LED module (ohms)
- Ground resistance to chassis
- BCM/SAM lamp output status (on/off) and diagnostic status bits
Diagnostic algorithm
- Use a scan tool to read fault memory and confirm B1617 is present; note freeze frame / run conditions.
- Visually inspect lamp E19/1 for physical damage, moisture, or loose mounting; remove lamp to inspect bulb/LED.
- With lamp removed, test the lamp externally on a known good 12 V supply to confirm lamp functionality.
- With ignition and lamps ON, measure voltage at the vehicle connector: verify battery voltage at the supply pin and good ground at ground pin.
- If supply voltage is present and lamp works externally, check connector continuity and wiring back to BCM/SAM for opens or shorts (use back-probing or disconnect harness and measure).
- If wiring checks OK but lamp still not powered when commanded, monitor BCM/SAM output status with a diagnostic tool while commanding the lamp on/off; if output does not change, suspect BCM/SAM driver fault.
- Repair or replace failed component: socket/connector cleaning or replacement, repair/replace damaged wiring, replace lamp module if faulty.
- After repair, clear DTCs, verify lamp operation and perform road/ignition cycles to ensure DTC does not return.
- Safety note: avoid shorting terminals; disconnect battery if performing extensive wiring repairs or module replacement per manufacturer procedure.
Likely causes
- Failed lamp unit (most common)
- Corroded socket/connector or poor pin contact
- Broken wire near lamp or in harness junction
- Failed lamp driver in BCM/SAM
Fault status
Status
Left license plate lamp (E19/1) defective — lamp circuit malfunction detected (open/short/driver failure).
Repair difficulty: Easy
Diagnostic time: 0.3-1.0 hours
Similar codes
Your experience will help others
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Code
B1617
Other
B — Body
Wiper Rear Disable Switch Circuit Short To Battery
Views:
UK: 17
EN: 28
RU: 17
AI status
Completed
Completed
100%
Causes
- Burnt or failed bulb / LED module in left license plate lamp (E19/1)
- Corroded, loose or damaged connector at the lamp
- Open circuit or short in the wiring between lamp and body control module (BCM) / SAM
- Faulty ground connection at the lamp
- Defective BCM / SAM output or internal driver for the lamp
- Intermittent contact caused by moisture or physical damage
Symptoms
- Left license plate lamp not illuminated
- Possible asymmetric lighting at rear of vehicle
- Bulb out warning or dash message (depending on model)
- DTC stored and possibly current/faulty lamp indicator in diagnostics
What to check
- Visually inspect the left license plate lamp for damage, moisture or discoloration
- Verify whether the lamp lights when switched on (parking lights/DRL as applicable)
- Inspect connector for corrosion, bent pins, water ingress or loose fit
- Check fuse(s) related to exterior lamps (refer to vehicle manual)
- Scan BCM/SAM for stored faults and live data on lamp output
- Measure supply voltage and ground at the lamp connector with ignition on
Signal parameters
- Battery voltage at lamp positive pin (expected ~11–14 V with ignition/parking lights on)
- Voltage drop between lamp positive and ground
- Continuity / resistance of lamp filament or LED module (ohms)
- Ground resistance to chassis
- BCM/SAM lamp output status (on/off) and diagnostic status bits
Diagnostic algorithm
- Use a scan tool to read fault memory and confirm B1617 is present; note freeze frame / run conditions.
- Visually inspect lamp E19/1 for physical damage, moisture, or loose mounting; remove lamp to inspect bulb/LED.
- With lamp removed, test the lamp externally on a known good 12 V supply to confirm lamp functionality.
- With ignition and lamps ON, measure voltage at the vehicle connector: verify battery voltage at the supply pin and good ground at ground pin.
- If supply voltage is present and lamp works externally, check connector continuity and wiring back to BCM/SAM for opens or shorts (use back-probing or disconnect harness and measure).
- If wiring checks OK but lamp still not powered when commanded, monitor BCM/SAM output status with a diagnostic tool while commanding the lamp on/off; if output does not change, suspect BCM/SAM driver fault.
- Repair or replace failed component: socket/connector cleaning or replacement, repair/replace damaged wiring, replace lamp module if faulty.
- After repair, clear DTCs, verify lamp operation and perform road/ignition cycles to ensure DTC does not return.
- Safety note: avoid shorting terminals; disconnect battery if performing extensive wiring repairs or module replacement per manufacturer procedure.
Likely causes
- Failed lamp unit (most common)
- Corroded socket/connector or poor pin contact
- Broken wire near lamp or in harness junction
- Failed lamp driver in BCM/SAM
Fault status
Status
Left license plate lamp (E19/1) defective — lamp circuit malfunction detected (open/short/driver failure).
Repair difficulty: Easy
Diagnostic time: 0.3-1.0 hours
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