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DTC B1854: TEL Antenna Connection
 
 
caution
  • Park the vehicle in an open area where radio wave is not shielded.
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
TROUBLE JUDGMENT
Check Conditions
  • The TCU is being activated except for the test mode period.
Judgment Criterion
  • If the system detects that the GNSS/TEL antenna assembly (TEL terminal) is disconnected for 10 seconds or more.
 
 
TROUBLESHOOTING HINTS
  • The connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  • The GNSS/TEL antenna assembly (TEL terminal) may be defective
  • The TCU may be defective
 
 
DIAGNOSIS
STEP 1. Check the connection of GNSS/TEL antenna assembly feeder’s connector (TEL terminal) and TCU.
Is the check result normal?
Go to Step 2.
Thoroughly connect the GNSS/TEL antenna assembly feeder’s connector (TEL terminal) and the TCU.
 
STEP 2. Check if there is any damage to the GNSS/TEL antenna assembly.
Is the check result normal?
Go to Step 3.
Replace the GNSS/TEL antenna assembly.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set in the TCU.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(4) Check the DTC.
Is the DTC set?
Replace the GNSS/TEL antenna assembly (Refer to ). Then go to Step 4.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 4. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Check again if the DTC is set in the TCU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check the DTC.
Is the DTC set?
Replace the TCU (Refer to ).
The procedure is complete.