Code
No.B240B FL antenna(outdoor) open
| caution |
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 transmitter antenna (front passenger’s
side), the diagnosis code is set.
JUDGEMENT CRITERIA
When the ignition push switch is pressed, or when the antenna open circuit detection request
is received from the diagnosis function, the failure is detected.
PROBABLE CAUSES
- Malfunction of the outside transmitter antenna assembly (front passenger’s
side)
- Malfunction of the KOS-ECU
- Damaged wiring harness and connectors
DIAGNOSTIC PROCEDURE
STEP 1. Connector check: D-101 Outside transmitter antenna
assembly (passenger’s side) connector, C-104 KOS-ECU connector
Q.
Is the check result normal?
Go to Step 2.
Repair the defective connector.
STEP 2. Check the wiring harness between the D-101 outside transmitter
antenna assembly (passenger’s side) connector terminal Nos. 1, 2, 3 and the C-104 KOS-ECU
connector terminal No. 40, 18, 6.
Check the communication, power supply, and earth wires for open circuit.
| note |
Prior to the wiring harness inspection, check intermediate connectors C-22 and C-36 <RH
drive vehicles>, and repair if necessary.
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Q.
Is the check result normal?
Go to Step 3.
Repair the wiring harness.
STEP 3. Keyless operation system communication test
Check that the communication with the outside transmitter antenna assembly (front passenger’s side)
is normal (Refer to Antenna Test 
).
Antennas to be checked
Passenger side antenna (exterior)
OK: Normal is displayed.
Q.
Is the check result normal?
Go to Step 4.
Replace the outside transmitter antenna assembly (front passenger’s side).
STEP 4. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
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(3)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 ).
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