[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - TONE ALARM - INSPECTION PROCEDURE B-3: R (reverse) position warning function does not work. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE B-3: R (reverse) position warning function does not work.
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM The ETACS-ECU operates this function in accordance with the input signals below. Ignition switch (IG1) Park/neutral switch ("R" position) If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.
| POSSIBLE CAUSES Malfunction of the inhibitor switch Malfunction of the ETACS-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. 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: ON 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 2. NO: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible" .
| Step 2. Function diagnosis by using the SWS monitor Check the SWS communication signal, which are related to the R (reverse) position warning function. <Selected item> BUZZER - REVERSE ALRM Ignition switch: ON Inhibitor switch: R (reverse) position
Item No. | Item name | Normal conditions
--- | --- | ---
Item 30 | IG SW(IG1) | ON
Item 41 | INHIBITOR SW | ON
Item 43 | BUZZER | ON
OK: Normal conditions are displayed for all the items. Q: Are the check result normal? Normal conditions displayed for all the items: Go to Step 3. Normal condition is not displayed for item No.30: Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received" . Normal condition is not displayed for item No.41: Refer to inspection procedure P-3 "The inhibitor switch (reverse position) signal is not received" . Normal condition is not displayed for item No.43: Replace the ETACS-ECU.
| Step 3. Retest the system. Check that the R (reverse) position warning 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 - TONE ALARM - INSPECTION PROCEDURE B-3: R (reverse) position warning function does not work. | PRINT PAGE / INDEX / PRIOR / NEXT

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