[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - CENTRAL DOOR LOCKING SYSTEM - INSPECTION PROCEDURE C-4: The Impact Detection Door Unlock Function does not Function. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE C-4: The Impact Detection Door Unlock Function does not Function.
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM If the impact detection door unlock function does not work normally, the input signal circuit from the impact detection sensor, the SRS-ECU or the ETACS-ECU may be defective.
| POSSIBLE CAUSES Malfunction of the SRS-ECU Malfunction of the ETACS-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Use the MUT-II/III to confirm a diagnosis code. Check that the SRS-ECU sets a diagnosis code. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to GROUP 52B - Troubleshooting .
| Step 2. ECU check on the SWS monitor Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal. Ignition switch: OFF ECUS TO BE CHECKED ETACS ECU OK: "OK" is displayed on the "ETACS ECU" menu. Q: Is the check result normal? YES: Go to Step 3. NO: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible ."
| Step 3. Connector check: C-115 SRS-ECU connector Q: Is the check result normal? YES: Go to Step 4. NO: Repair the defective connector.
| Step 4. Check the SRS-ECU. Check that the SRS-ECU works normally. Refer to GROUP 52B, SRS Control Unit (SRS-ECU) . Q: Is the check result normal? YES: Go to Step 5. NO: Replace the SRS-ECU.
| Step 5. Connector check: C-220 ETACS-ECU connector Q: Is the check result normal? YES: Go to Step 6. NO: Repair the defective connector.
| Step 6. Check the wiring harness between C-115 SRS-ECU connector terminal No. 14 and C-220 ETACS-ECU connector terminal No. 29. Check the power supply line for open or short circuit. Q: Is the check result normal? YES: Go to Step 7. NO: Repair the wiring harness.
| Step 7. Measure the resistance at the C-115 SRS-ECU connector. Disconnect the connector, and measure at the wiring harness side. Resistance between C-115 SRS-ECU connector terminal No. 15 and body earth OK: 2 Ω or less Q: Is the check result normal? YES: Go to Step 9. NO: Go to Step 8.
| Step 8. Check the wiring harness between C-115 SRS-ECU connector terminal No. 15 and body earth. Check the earth line for open or short circuit. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Repair the wiring harness.
| Step 9. Retest the system. Check that the impact detection door unlock function works normally. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Replace the ETACS-ECU.

[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - CENTRAL DOOR LOCKING SYSTEM - INSPECTION PROCEDURE C-4: The Impact Detection Door Unlock Function does not Function. | PRINT PAGE / INDEX / PRIOR / NEXT

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