Code No.B240C Tail gate antenna(outdoor) open
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When replacing the ECU, always check that the communication circuit is normal.
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DIAGNOSTIC FUNCTION
If an open circuit is detected in the outside transmission antenna assembly (tailgate), the diagnosis code is set.
JUDGEMENT CRITERIA
An open circuit or short to earth is detected consecutively five times when radio waves are sent from the outside transmission antenna assembly (tailgate).
PROBABLE CAUSES
- Malfunction of the outside transmission antenna assembly (tailgate)
- Malfunction of the KOS&OSS-ECU
- Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
STEP 1. Check of short to power supply, short to earth, and open circuit in EGTP, EGTG line between the outside transmission antenna assembly (tailgate) connector and the KOS&OSS-ECU connector.
Q.
Is the check result normal?
Go to Step 2.
Repair the connectors or wiring harness.
STEP 2. Keyless operation system communication test
Check that the communication with the outside transmission antenna assembly (tailgate) is normal (Refer to Antenna Test 
).
- Tailgate antenna (outdoor)
OK: Normal is displayed.
Q.
Is the check result normal?
Go to Step 3.
Replace the outside transmission antenna assembly (tailgate).
STEP 3. Check whether the diagnosis code is set again.
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(1)Erase the diagnosis code.
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(2)Engine switch: "LOCK" (OFF)
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(3)Close all the doors and press the lock/open switch of tailgate lock release handle to lock and unlock the door several times.
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(4)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace KOS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Deal with Intermittent Malfunction ).