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Inspection Procedure B-1: None of the turn-signal lights illuminate.
 
 
cautionWhenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If none of the turn-signal lights does not illuminate, the ignition switch (IG1), the turn-signal light switch input circuit or the ETACS-ECU may be defective. Using a customization function, the turn-signal lights can be operated even when the ignition switch is in the "ACC" position.
 
 
TROUBLESHOOTING HINTS
  • The column switch may be defective.
  • The ETACS-ECU may be defective.
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), read the diagnostic trouble code.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is stored.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC stored?
Diagnose the ETACS-ECU. Refer to ETACS, Diagnosis .
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-III), check data list.
Using the ETACS-ECU service data, check the signals related to the illumination of turn-signal light.
  • Turn the ignition switch to the "ON" position.
 
Item No.Item nameNormal condition
30Ignition switch(IG1)ON
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 3.
Troubleshoot the ETACS-ECU. Refer to ETACS, Diagnosis .
 
STEP 3. Retest the system.
Check that the turn-signal lights illuminate.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.