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DTC B1706: Flasher fuse blown
 
 
cautionWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the flasher fuse is broken, the ETACS-ECU stores DTC B1706.
 
 
TROUBLESHOOTING HINTS
  • The fuse may be defective.
  • The ETACS-ECU may be defective.
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.
 
 
DIAGNOSIS
Required Special Tools:
  • MB992006: Extra fine probe
  • MB991223: Harness set
STEP 1. Check the flasher fuse.
Is the fuse in good condition?
Go to Step 2.
Check the flasher fuse (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - Inspection service point for blown fuse ). Then go to Step 3.
 
STEP 2. Check of open circuit in HAZ1 line between the ETACS-ECU connector and the fusible link.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Using scan tool (M.U.T.-III), Check whether the diagnostic trouble code is stored again.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(5) Check whether the ETACS-ECU DTC is stored.
Is the DTC stored?
Replace the ETACS-ECU.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).