[ 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. U1007 Theft alarm sensor LIN timeout<Vehicles with security alarm sensor><Vehicles with security alarm sensor>
Code No.U1007 Security alarm sensor LIN timeout <Vehicles with security alarm sensor>
 
 
cautionBefore replacing the ECU, ensure that the communication circuit is normal.
 
 
 
 
JUDGEMENT CRITERIA
The ETACS-ECU will store diagnosis code No. U1007 when no signals are received from the security alarm sensor.
 
 
PROBABLE CAUSES
  • Faulty security alarm sensor
  • Malfunction of the LIN bus
 
 
DIAGNOSIS PROCEDURE
STEP 1. Resistance measurement at the security alarm sensor connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the security alarm sensor 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 sensor 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 sensor connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage between the security alarm sensor 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 BUP1 line between ETACS-ECU connector and security alarm sensor 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 LIN2 line between ETACS-ECU connector and security alarm sensor connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. Check whether the diagnosis code is set again.
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 sensor (Refer to GROUP 54A - Security Alarm Sensor 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 ).