Code
B0106
Generic
B — Body
LIDAR Washer Actuator A
AI status
Completed
Completed
100%
Causes
- Blown fuse for washer pump/actuator circuit
- Open or short in wiring harness to LIDAR washer actuator A
- Corroded, loose or damaged connector at actuator or body control module (BCM)
- Failed washer actuator (pump/motor/solenoid)
- BCM or module output driver fault
- Water intrusion or mechanical seizure in actuator
Symptoms
- LIDAR washer does not operate when commanded
- Intermittent washer operation or only works sometimes
- Washer runs continuously or cannot be turned off
- Warning or fault message on instrument cluster relating to LIDAR cleaning
- Unusual noise from washer pump or no noise when commanded
What to check
- Check for stored freeze-frame and related codes in BCM and sensor modules
- Visual inspection: harness, connectors, grommets and actuator for damage or corrosion
- Verify fuse(s) for washer/actuator circuit are intact and correctly rated
- Operate washer while monitoring for expected actuator response (noise, flow)
- Probe for power and ground at actuator connector with command active
- Measure actuator resistance and compare to specification or bench-test with known good 12V supply
Signal parameters
- Key ON (not running): 0 V to battery voltage at actuator power pin depending on switch/relay state
- When commanded ON: actuator power pin ~12 V (or PWM depending on vehicle) — typically 11–14 V
- Ground continuity: near 0 Ω between actuator ground pin and vehicle chassis ground
- Actuator coil/motor resistance: typical pump motors vary; expect low ohms (few Ω to tens of Ω). Compare to service data
- Command signal (if PWM): duty cycle 0–100% and frequency as specified by OEM (often a few hundred Hz)
Diagnostic algorithm
- Read and record DTC B0106 and any related codes from all modules. Check freeze frame and re-create condition if needed.
- Perform visual inspection of washer actuator A, tubing and wiring. Look for damage, corrosion, pin push-out or water intrusion.
- Verify fuses and relays for washer/cleaning system. Replace any blown fuse and re-test.
- Attempt to activate the LIDAR washer from the switch or diagnostic tester. Note audible pump noise or lack of movement.
- Backprobe actuator connector while commanding: check for battery voltage on power feed and good ground. If no voltage but switch/BCM commanded, trace upstream (relay, fuse, BCM output).
- If voltage present but actuator does not run, disconnect actuator and bench-test with direct 12V (be cautious; observe current draw). If actuator fails bench test, replace actuator.
- If actuator works on bench but not in vehicle and power/ground present only when commanded, measure current draw in-circuit. Excessive draw indicates mechanical binding or fluid blockage; open circuit indicates internal actuator fault.
- If no power from BCM output, check for communication errors, scan for BCM-related codes, and inspect/repair wiring or replace BCM only after confirming wiring and grounds are good.
- Repair or replace damaged connectors, wiring, fuses, relays or actuator as indicated. Clear codes and validate repair by cycling the washer and rechecking for codes.
Likely causes
- Failed washer actuator (pump motor seized or burned)
- Open/shorted harness between BCM and actuator
- Connector corrosion or pin damage at actuator
- Blown/weak fuse or fusible link
- BCM output driver failed or internal module fault
Fault status
Status
LIDAR washer actuator A circuit fault — actuator failed or circuit abnormal (power, ground, wiring or module).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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