[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54B-LOCAL INTERCONNECT NETWORK (LIN) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE No. U1006 Theft alarm siren LIN timeout<Vehicles with security alarm sensor><Vehicles with security alarm sensor>
Code No.U1006 Security alarm siren LIN timeout <Vehicles with security alarm sensor>
 
 
cautionBefore replacing the ECU, ensure that the communication circuit is normal.
 
 
 
 
JUDGEMENT CRITERIA
The ETACS-ECU will set diagnosis code No. U1006 when no signals are received from the security alarm siren.
 
 
PROBABLE CAUSES
  • Faulty security alarm siren
  • Malfunction of the LIN bus
 
 
DIAGNOSIS PROCEDURE
STEP 1. Resistance measurement at the security alarm siren connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the security alarm siren connector (earth terminal) and the body earth.
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Go to Step 3.
Go to Step 2.
 
STEP 2. Check of open circuit in body earth line between security alarm siren connector (earth terminal) and the body earth.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 3. Voltage measurement at the security alarm siren connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage between the security alarm siren connector (power supply terminal) and the body earth.
OK: System voltage
Is the check result normal?
Go to Step 5.
Go to Step 4.
 
STEP 4. Check of short to power supply, short to earth, and open circuit in BUP4 line between ETACS-ECU connector and security alarm siren connector.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 5. Check of open circuit in LITI line between ETACS-ECU connector and security alarm siren connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. Replace the security alarm siren temporarily, and check whether the diagnosis code is set.
Check again if the diagnosis code is set in the ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if diagnosis code is set.
Is the diagnosis code set?
Replace the security alarm siren (Refer to GROUP 54A - Security Alarm Siren Removal And Installation ).
A poor connection, open circuit, or other intermittent malfunctions in the LIN bus lines between the security alarm sensor and the ETACS-ECU (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).