Code No.2001: P/W (AS) SW pulse1 disconnection <RH drive vehicles>

caution

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

If ETACS-ECU detects only signals of the power window position sensor 20 times in succession while the front passenger’s power window is operating, ETACS-ECU sets the diagnosis code No. 2001.

Past trouble

If the diagnosis code No. 2001 is set as past trouble, carry out diagnosis with particular emphasis on wiring and connector(s) in the CAN bus line. For diagnosis procedures, refer to How to cope with past trouble (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Treat Past Trouble

note

For a past trouble, you cannot find it by the M.U.T.-III CAN bus diagnostics even if there is any failure in CAN bus lines. In this case, refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Treat Past Trouble

and check the CAN bus lines. You can narrow down the possible cause of the trouble by referring to the diagnosis code, which is set regarding the CAN communication-linked ECUs (Refer to GROUP 54C - Explanation About The M.U.T.-III CAN Bus Diagnostics

PROBABLE CAUSES

Malfunction of the front power window motor (LH)
Malfunction of the front power window sub switch
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: E-16 front power window sub switch connector and E-18 front power window motor (LH) connector

Q. Is the check result normal?

Go to Step 2.

Repair the connector.

STEP 2. Check the wiring harness between E-16 front power window sub switch connector terminal Nos.8 and 3 to E-18 front power window motor (LH) connector terminal Nos.4 and 5.

Check the input and output lines for open or short circuit.

Q. Is the check result normal?

Go to Step 3.

Repair the wiring harness.

STEP 3. Check whether the diagnosis code is reset.

(1)Replace the front power window motor (LH).

(2)Check that diagnosis code is not reset.

Q. Is diagnosis code set?

	Replace the front power window sub switch.

	The procedure is complete.