[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - Inspection procedure P-20: The hood switch signal is not received. | PRINT PAGE / INDEX / PRIOR / NEXT

Inspection procedure P-20: The hood switch signal is not received.
| CAUTION Whenever the ECU is replaced, ensure that the input signal circuit is normal.
| COMMENTS ON TROUBLE SYMPTOM Input signal from the hood switch is used to operate the security alarm. If the signal is abnormal, the security alarm will not illuminate.
| POSSIBLE CAUSES Malfunction of the hood switch Malfunction of the ETACS-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Connector check: A-33 hood switch connector Q: Is the check result normal? YES: Go to Step 2. NO: Repair the defective connector.
| Step 2. Check the hood switch. Refer to GROUP 42 - Hood . Q: Is the check result normal? YES: Go to Step 3. NO: Replace the hood switch.
| Step 3. Measure the resistance at the A-33 hood switch connector. Disconnect the connector, and measure at the wiring harness side. Continuity between A-33 hood switch connector terminal No.2 and body earth OK: 2Ω or less Q: Is the check result normal? YES: Go to Step 5. NO: Go to Step 4.
| Step 4. Check the wiring harness between A-33 hood switch connector terminal No.2 and body earth. Check the earth wires for open 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 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-220 ETACS-ECU connector terminal No.21 and A-33 hood switch connector terminal No.1. NOTE: Prior to the wiring harness inspection, check intermediate connector C-116, and repair if necessary. Check the input line for open circuit. Q: Is the check result normal? YES: Go to Step 7. NO: Repair the wiring harness.
| Step 7. Check the ETACS SW data by using the SWS monitor. Hood switch: ON
Item No. | Item name | Normal conditions
--- | --- | ---
Item 13 | HOOD SW | ON
OK: Normal condition is displayed. 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.> - - INPUT SIGNAL PROCEDURES - Inspection procedure P-20: The hood switch signal is not received. | PRINT PAGE / INDEX / PRIOR / NEXT

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