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Inspection Procedure 1: None of the taillights illuminate.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
If none of taillights illuminates, the taillight switch input circuit or ETACS-ECU may have a problem.
 
 
TROUBLESHOOTING HINTS
  • The column switch may be defective.
  • The ETACS-ECU may be defective.
 
 
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.
Check the input signal from the taillight switch.
  • Column switch (lighting switch): TAIL
 
Item No.Item nameNormal condition
59Taillight outputON
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 taillight illuminates normally.
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.