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Inspection Procedure 11: ETACS-ECU does not receive any signal from the hazard warning light switch.
 
 
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
If there is an error to the hazard warning light switch input signal, the hazard warning light switch signal is no longer output to the communication line.
 
 
TROUBLESHOOTING HINTS
  • The center panel unit 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
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Check center panel unit connector C-205 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is center panel unit connector C-205 in good condition?
Go to Step 2.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection . Check that the input signal of hazard warning light switch is normal.
 
STEP 2. Check the hazard warning light switch.
Remove the center panel unit. Then check continuity between the switch terminal and switch body.
 
Switch positionTester connectionSpecified condition
Released8 - switch bodyOpen circuit
Pressed8 - switch bodyLess than 2 ohms
Is the hazard warning light switch in good condition?
Go to Step 3.
Replace the center panel unit. Check that the input signal of hazard warning light switch is normal.
 
STEP 3. Check ETACS-ECU connector C-411 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is ETACS-ECU connector C-411 in good condition?
Go to Step 4.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection . Check that the input signal of hazard warning light switch is normal.
 
STEP 4. Check the wiring harness between center panel unit connector C-205 (terminal 8) and ETACS-ECU connector C-411 (terminal 19).
Check the input lines for open circuit and short circuit.
Is the wiring harness between center panel unit connector C-205 (terminal 8) and ETACS-ECU connector C-411 (terminal 19) in good condition?
Replace the ETACS-ECU. Check that the input signal of hazard warning light switch is normal.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the input signal of hazard warning light switch is normal.