Inspection Procedure O-6

The washer fluid level switch signal is not sent to the ETACS-ECU.

Washer Fluid Level Switch Input Circuit:

Connectors:

CIRCUIT OPERATION
The ETACS-ECU operates the low washer fluid level warning light according to the input signal from the washer fluid level switch.

TECHNICAL DESCRIPTION (COMMENT)
The washer fluid level switch input signal is used to operate the following functions:
- Low washer fluid level tone alarm function
- Low washer fluid level warning light

If the signal fails, these devices will not work normally.

TROUBLESHOOTING HINTS
- Malfunction of the washer fluid level switch
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)
- MB991529: Diagnostic Trouble Code Check Harness







STEP 1. Check the washer fluid level switch.

Q: Is the washer fluid level switch In good condition?

YES: Go to Step 2.
NO: Repair it. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.

STEP 2. Check the washer fluid level switch ground circuit at the washer fluid level switch connector A-32.
1. Disconnect the washer fluid level switch connector A-32 and measure at the harness side.




2. Measure the resistance between terminal 1 and ground.

Q: Is the resistance less than 2 ohm?

YES: Go to Step 5.
NO: Go to Step 3.




STEP 3. Check washer fluid level switch connector A-32 for damage.

Q:Is washer fluid level switch connector A-32 in good condition?

YES: Go to Step 4.
NO: Repair or replace it. Refer to Harness Connector Inspection. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.




STEP 4. Check the harness wires between washer fluid level switch connector A-32 and ground.

Q: Are the harness wires between washer fluid level switch connector A-32 and ground in good condition?

YES: There is no action to be taken.
NO: Repair them. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.







STEP 5. Check washer fluid level switch connector A-32 and ETACS-ECU connector C-312 for damage.

Q: Are washer fluid level switch connector A-32 and ETACS-ECU connector C-312 In good condition?

YES: Go to Step 6.
NO: Repair or replace them. Refer to Harness Connector Inspection. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.







STEP 6. Check the harness wires between washer fluid level switch connector A-32 and ETACS-ECU connector C-312.









NOTE: After checking intermediate connectors C-05 and C-209, check the wires. If Intermediate connectors C-05 and C-209 are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Are the harness wires between washer fluid level switch connector A-32 and ETACS-ECU connector C-312 in good condition?

YES: Replace the ETACS-ECU. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.
NO: Repair it. The washer fluid level switch input signal should be able to be checked and the functions, which are described in the "Technical Description (comment)," should work normally.