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Inspection Procedure 20: The washer fluid level switch signal is not received.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
If there is an error to the washer fluid level switch input signal, the washer fluid level switch signal is no longer output to the communication line.
 
 
TROUBLESHOOTING HINTS
  • The washer fluid level 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
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Washer fluid level switch check.
Refer to GROUP 51 - Wiper and washer .
Is the check result normal?
Go to Step 2.
Replace the windshield washer tank assembly (Refer to GROUP 51 - Windshield washer ).
 
STEP 2. Resistance measurement at windshield washer tank fluid level sensor connector (ground terminal).
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the windshield washer tank fluid level sensor connector (ground terminal) and body ground.
OK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check of open circuit in ground line between windshield washer tank fluid level sensor connector and body ground.
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 4. Check of open circuit in WFSW line between windshield washer tank fluid level sensor connector and body ground.
Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.
 
STEP 5. Using scan tool (M.U.T.-IIISE), check data list.
Check the ETACS-ECU data list.
(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) Check the input signals from the washer fluid level switch.
  • Drain the washer fluid.
 
Item No.Item nameNormal conditions
103Washer fluid/Trailer turn switchON
Item No.Item nameNormal conditions
103Washer fluid/Trailer turn switchON
OK: Normal condition is displayed.
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 (Refer to ).