2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. U0167 ETACS-ECU (IMMOBILIZER) COMMUNICATION ERROR<Vehicles without KOS><Vehicles without KOS>
Code No. U0167: ETACS-ECU (Immobilizer) Communication Error <Vehicles without KOS>
| caution | If diagnosis code U0167 is set in the engine-ECU, surely perform CAN bus line diagnosis. |
| caution | Replace ECU after certainly confirming that the communication circuits are normal. |
| caution | When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID  .) |
TROUBLE JUDGEMENT
Check Conditions
- After 2 seconds have passed since the ignition switch was turned to "ON" position.
- Battery positive voltage is more than 8 V.
Judgement Criterion
- Unable to receive ETACS-ECU (immobilizer) signals through the CAN bus line.
COMMENTS ON TROUBLE SYMPTOM
Current malfunction
- The failure is possibly caused by malfunction of the harness and connector in CAN bus line between engine-ECU and ETACS-ECU, by malfunction in the power supply system of ETACS-ECU, in ETACS-ECU itself, in engine-ECU.
Past malfunction
- Proceed with troubleshooting focusing on malfunction of the harness and connector in CAN bus line between engine-ECU and ETACS-ECU and malfunction in the power supply system of ETACS-ECU. For diagnosis procedure, refer to how to cope with past malfunctions. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Treat Past Trouble).
| note | In the case of past malfunctions, M.U.T.-IIISE CAN bus line diagnosis cannot detect a malfunction even if there is a malfunction in CAN bus. Therefore, check CAN bus line as in the case of response to intermittent malfunctions (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions). It is possible to narrow down areas with a high possibility of malfunctions from diagnosis codes set in each ECU that performs CAN communication (Refer to GROUP 54C - Explanation about the M.U.T.-IIISE CAN Bus Diagnostics). |
FAIL-SAFE AND BACKUP FUNCTION
- Engine start is prohibited.
PROBABLE CAUSES
- Failed harness and connector
- Failed ETACS-ECU
- Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnosis
- Use M.U.T.-IIISE to perform CAN bus line diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnostics Table). After repairing the CAN bus line, go to Step 4.
STEP 2. M.U.T.-IIISE diagnosis code
STEP 3. M.U.T.-IIISE diagnosis code
- Reconfirmation of diagnosis code.
Confirm again whether the diagnosis code is set in the engine-ECU.
- Erase the set diagnosis code.
- Ignition switch: LOCK (OFF) → ON
- Confirm whether the diagnosis code is set.
Is the diagnosis code set?
After replacing engine-ECU, go to Step 4. Intermittent malfunction in CAN bus line between engine-ECU and ETACS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
STEP 4. M.U.T.-IIISE diagnosis code
- Reconfirmation of diagnosis code.
Confirm again whether the diagnosis code is set in the engine-ECU.
- Erase the set diagnosis code.
- Ignition switch: LOCK (OFF) → ON
- Confirm whether the diagnosis code is set.
Is the diagnosis code set?
Go to Step 1. Check end.
