Step 1. Check that the hazard warning lamps operate.

Check that the hazard warning lamps illuminate normally.

Q: Is the check result normal?

YES:  Go to Step 6.
NO:  Go to Step 2.

Step 2. Connector check: C-217 ETACS-ECU connector

Q: Is the check result normal?

YES:  Go to Step 3.
NO:  Repair the defective connector.

Step 3. Measure the voltage at the C-217 ETACS-ECU connector.

1. Remove the ETACS-ECU, and measure at the junction block side.

2. Voltage between C-217 ETACS-ECU connector terminal No.11 and body earth
OK: Battery positive voltage

Q: Is the check result normal?

YES:  Go to Step 5.
NO:  Go to Step 4.

Step 4. Check the wiring harness between C-217 ETACS-ECU connector terminal No.11 and the battery.

NOTE: Prior to the wiring harness inspection, check intermediate connector C-116 and junction block connector C-202, and repair if necessary.

• Check the power supply line 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. Retest the system.

Check that the turn-signal lamps illuminate 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.

Step 6. Function diagnosis by using the SWS monitor

Check the SWS communication signal, which are related to the right turn-signal lamps.

<Selected item> TURN SIGNAL - TURN-SIG. RH

• Turn-signal lamp switch: RH

• Ignition switch: ON

Item No.	Item name	Normal condition
Item 10	TURN SIG.RH	ON
Item 11	TURN SIG.LH	OFF
Item 30	IG SW(IG1)	ON

OK: Normal conditions displayed for all the items

Q: Is the check result normal?

Normal conditions are displayed for all the items.:  Go to Step 7.
Normal condition is not displayed for item 10 or 11.:  Refer to Inspection Procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received ."
Normal condition is not displayed for item No.30.:  Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."

Step 7. Function diagnosis by using the SWS monitor

Check the SWS communication signal, which are related to the left turn-signal lamps.

<Selected item> TURN SIGNAL - TURN-SIG. LH

• Turn-signal lamp switch: LH

• Ignition switch: ON

Item No.	Item name	Normal condition
Item 10	TURN SIG.RH	OFF
Item 11	TURN SIG.LH	ON

OK: Normal condition is displayed.

Q: Is the check result normal?

Normal conditions are displayed for all the items.:  Go to Step 8.
Normal condition is not displayed for item 10 or 11.:  Refer to Inspection Procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received ."

Step 8. Retest the system.

Check that the turn-signal lamps illuminate.

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.