[Previous][Next]
Inspection Procedure 1: None of the turn-signal lights illuminate.
 
 
caution
  • Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
If all the turn-signal lights do not illuminate, the ignition switch (IG1), the turn-signal light switch input circuit or the ETACS-ECU may have a problem.
 
 
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.-IIISE), read the DTC.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect Scan tool (M.U.T.-IIISE) ."
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC set?
Troubleshoot the ETACS-ECU. (Refer to .)
Go to Step 2.
 
STEP 2. Using scan tool (M.U.T.-IIISE), check data list.
Using the ETACS-ECU data list, check the signals related to the illumination of turn-signal light.
  • Turn the ignition switch to the "ON" position.
  • Turn the turn-signal light switch to the left position.
 
Item No.Item nameNormal condition
79IG voltageBattery positive voltage
17Turn switch leftON
  • Turn the turn-signal light switch to the right position.
 
Item No.Item nameNormal condition
18Turn switch rightON
OK: Normal conditions are displayed for all the items.
Is the check result normal?
: Go to Step 3.
: Troubleshoot the ETACS-ECU (Refer to Inspection Procedure 2 "The ignition switch (IG1) signal is not received" .).
: Troubleshoot the ETACS-ECU (Refer to Inspection Procedure 11 "The column switch signal is not received" .).
 
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.