Lexus ES manuals

Lexus ES: Sensor (Motor) Failure (B2341,B2344)

DESCRIPTION

When the sliding roof ECU (sliding roof drive gear assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2341 is stored.

When the sliding roof ECU (sliding roof drive gear assembly) detects a gear position malfunction and the sliding roof operation is stopped, DTC B2344 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2341

Sensor (Motor) Failure

Sensor (motor) failure (When the sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the motor)

  • Sliding roof ECU (Sliding roof drive gear assembly)
  • Panoramic moon roof switch (Map light sub-assembly)
  • Wire harness or connector

B2344

Position Failure

Position failure (When the sliding roof ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the gear position)

  • Sliding roof ECU (Sliding roof drive gear assembly)
  • Panoramic moon roof switch (Map light sub-assembly)
  • Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the sliding roof ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the sliding roof ECU (sliding roof drive gear assembly) must be initialized.

    Click here

  • DTCs B2341 and B2344 are stored in the sliding roof ECU (sliding roof drive gear assembly).

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTCs B2341 and B2344 are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK SLIDING ROOF OPERATION

(a) Check the sliding roof auto operation function.

Click here

OK:

Auto operation function operates normally.

NG

GO TO STEP 4

OK

3.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTCs B2341 and B2344 are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

4.

INITIALIZE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

(a) Check that the sliding roof ECU (sliding roof drive gear assembly) can be initialized.

Click here

OK:

Sliding roof ECU (sliding roof drive gear assembly) can be initialized.

NG

GO TO STEP 6

OK

5.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Body Electrical > Sliding Roof > Clear DTCs

(b) Check for DTCs.

Body Electrical > Sliding Roof > Trouble Codes

OK:

DTCs B2341 and B2344 are not output.

OK

END (MALFUNCTION DUE TO INITIALIZATION FAILURE)

NG

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

6.

CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) AND BODY GROUND)

(a) Disconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) connector.

(b) Disconnect the P13 panoramic moon roof switch (map light sub-assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Q1-8 (CLS) - P13-12 (CLS)

Always

Below 1 Ω

Q1-8 (CLS) or P13-12 (CLS) - Body ground

Always

10 kΩ or higher

Q1-10 (OPN) - P13-11 (OPN)

Always

Below 1 Ω

Q1-10 (OPN) or P13-11 (OPN) - Body ground

Always

10 kΩ or higher

Q1-4 (TILT) - P13-7 (B)

Always

Below 1 Ω

Q1-4 (TILT) or P13-7 (B) - Body ground

Always

10 kΩ or higher

Q1-5 (OPN) - P13-23 (UP)

Always

Below 1 Ω

Q1-5 (OPN) or P13-23 (UP) - Body ground

Always

10 kΩ or higher

Q1-9 (CLS) - P13-24 (DOWN)

Always

Below 1 Ω

Q1-9 (CLS) or P13-24 (DOWN) - Body ground

Always

10 kΩ or higher

Q1-2 (E) - Body ground

Always

Below 1 Ω

P13-19 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY)

(a) Remove the panoramic moon roof switch (map light sub-assembly).

Click here

(b) Inspect the panoramic moon roof switch (map light sub-assembly).

Click here

OK

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

NG

REPLACE PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY)

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