Lexus ES manuals

Lexus ES: Switch Failure (B2342)

DESCRIPTION

This DTC is stored when the sliding roof ECU (sliding roof drive gear assembly) detects that the panoramic moon roof switch (map light sub-assembly) is stuck for 30 seconds or more.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2342

Switch Failure

Sliding roof ECU (sliding roof drive gear assembly) detects panoramic moon roof switch (map light sub-assembly) is stuck for 30 seconds or more.

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

WIRING DIAGRAM

Refer to DTC B2341.

Click here

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

  • The panoramic moon roof system uses the CAN and LIN communication system. First, confirm that there are no malfunctions in the CAN and LIN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

  • DTC B2342 is 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:

DTC B2342 is not output.

OK

END (DUE TO SWITCH BEING OPERATED FOR 30 SECONDS OR MORE)

NG

2.

READ VALUE USING TECHSTREAM (SLIDING ROOF)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Sliding Roof / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Sliding Roof > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Open Switch Failure(Past)

Sliding roof open switch stuck signal (Past)

OFF or ON

OFF: No sliding roof switch stuck signal (Past)

ON: Sliding roof switch stuck signal (Past)

-

Close Switch Failure(Past)

Sliding roof close switch stuck signal (Past)

OFF or ON

OFF: No sliding roof switch stuck signal (Past)

ON: Sliding roof switch stuck signal (Past)

-

Up Switch Failure(Past)

Roof sunshade open switch stuck signal (Past)

OFF or ON

OFF: No roof sunshade switch stuck signal (Past)

ON: Roof sunshade switch stuck signal (Past)

-

Down Switch Failure(Past)

Roof sunshade close switch stuck signal (Past)

OFF or ON

OFF: No roof sunshade switch stuck signal (Past)

ON: Roof sunshade switch stuck signal (Past)

-

Open Switch Failure(Current)

Sliding roof open switch stuck signal (Current)

OFF or ON

OFF: No sliding roof switch stuck signal (Current)

ON: Sliding roof switch stuck signal (Current)

-

Close Switch Failure(Current)

Sliding roof close switch stuck signal (Current)

OFF or ON

OFF: No roof sunshade switch stuck signal (Current)

ON: Roof sunshade switch stuck signal (Current)

-

Up Switch Failure(Current)

Roof sunshade open switch stuck signal (Current)

OFF or ON

OFF: No roof sunshade switch stuck signal (Current)

ON: Roof sunshade switch stuck signal (Current)

-

Down Switch Failure(Current)

Roof sunshade close switch stuck signal (Current)

OFF or ON

OFF: No roof sunshade switch stuck signal (Current)

ON: Roof sunshade switch stuck signal (Current)

-

Body Electrical > Sliding Roof > Data List

Tester Display

Open Switch Failure(Past)

Close Switch Failure(Past)

Up Switch Failure(Past)

Down Switch Failure(Past)

Open Switch Failure(Current)

Close Switch Failure(Current)

Up Switch Failure(Current)

Down Switch Failure(Current)

OK:

OFF appears on the Techstream screen.

OK

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)

NG

3.

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

(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

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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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