CAUTIONCOMMENTS ON TROUBLE SYMPTOM
Input signal from the power window main switch is used in order to check the power window
main switch and confirm how the system is communicating with the ETACS-ECU. If the communication
line is defective, the functions below will not work normally.- Power windows
- Multimode keyless entry function
POSSIBLE CAUSES
- Malfunction of the power window main switch
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 3. Check the wiring harness between C-219 ETACS-ECU connector
terminal No.59 and E-05 power window main switch connector terminal No.4.
NOTE: Prior to the wiring harness inspection, check intermediate connectors C-30, E-29 and joint
connector C-02, and repair if necessary.
- Check the communication lines for open circuit.
Q: Is the check result normal?
YES:
Go to Step 4
.NO: Repair the wiring harness.
Step 4. Replace the power window main switch, and then retest the
system.
- Replace the power window main switch.
- Check that the power window main switch signal is received.
Q: Is the check result normal?
YES:
The procedure is complete.NO: Replace the ETACS-ECU.
Step 6. Measure the voltage at the E-05 power window main switch connector.
- Remove the power window main switch, and measure at the wiring harness side.
- Voltage between E-05 power window main switch connector terminal No.6 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 9.NO: Go to Step 7
.Step 8. Check the wiring harness between C-208 power window relay
connector terminal No.4 and E-05 power window main switch connector terminal No.6.
NOTE: Prior to the wiring harness inspection, check intermediate connectors C-30, E-29 and junction
block connector C-203, and repair if necessary.
- Check the power supply line for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction 
).NO: Repair the wiring harness.
Step 9. Measure the resistance at the E-05 power window main switch
connector.
- Remove the power window main switch, and measure at the wiring harness side.
- Continuity between E-05 power window main switch connector terminal No.2 and body earth
OK: 2Ω
or less
Q: Is the check result normal?
YES:
Go to Step 11.NO: Go to Step 10
.Step 10. Check the wiring harness between E-05 power window main switch
connector terminal No.2 and body earth.
NOTE: Prior to the wiring harness inspection, check intermediate connectors C-30 and E-29, and
repair if necessary.
- Check the earth wires for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction ).NO: Repair the wiring harness.
Step 11. Retest the system.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction ).NO: Replace the power window main switch.