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 or short to earth circuit is detected in the outside transmission antenna assembly (trunk lid), 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 (trunk lid).
PROBABLE CAUSES
- Malfunction of the outside transmission antenna assembly (trunk lid)
- Malfunction of the KOS&OSS-ECU
- Damaged wiring harness and connectors
DIAGNOSIS PROCEDURE
STEP 1. Check of short to earth or open circuit in EGTP, EGTG line between the outside transmission antenna assembly (trunk lid) connector and the KOS&OSS-ECU connector
Q.
Is the check result normal?
Go to Step 2.
Repair the wiring harness.
STEP 2. Keyless operation system communication test
Check that the communication with the outside transmission antenna assembly (trunk lid) is normal (Refer to Antenna Test
).
Antennas to be checked
- Gate/Trunk antenna (outdoor)
OK: Normal is displayed.
Q.
Is the check result normal?
Go to Step 3.
Replace the outside transmission antenna assembly (trunk lid).
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 the trunk lid and press the trunk lid opener switch to unlock the trunk lid 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&OSS-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 Cope with Intermittent Malfunction
).