DTC B2342: Switch Failure: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Sliding Roof / Data List.
5. Read the Data List according to the display on the Techstream.
   SLIDING ROOF (ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Open Switch Failure (Current)	Open switch failure signal (Current)/ON or OFF	ON: Roof sunshade open signal failure (Current) OFF: Roof sunshade open signal not fail (Current)	-
   Close Switch Failure (Current)	Close switch failure signal (Current)/ON or OFF	ON: Roof sunshade close signal failure (Current) OFF: Roof sunshade close signal not fail (Current)	-
   Open Switch Failure (Past)	Open switch failure signal (Past)/ON or OFF	ON: Roof sunshade open signal failure (Past) OFF: Roof sunshade open signal not fail (Past)	-
   Close Switch Failure (Past)	Close switch failure signal (Past)/ON or OFF	ON: Roof sunshade close signal failure (Past) OFF: Roof sunshade close signal not fail (Past)	-

   OK

   "OFF" appears on the Techstream screen.

NG → See step   2 

OK → See step   4 

1. Disconnect the z21 roof sunshade ECU (sliding roof drive gear assembly) connector.
2. Disconnect the U3 roof sunshade switch (map light assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z21-7 (OPN) - Body ground	Always	10 kΩ or higher
   z21-9 (CLS) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the roof sunshade switch (map light assembly). Refer to REMOVAL .
   Fig 1: Checking Roof Sunshade Switch (Map Light Assembly) With Connector End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   8 (CLS) - 15 (GND1)	CLOSE switch is pressed	Below 1 Ω
   8 (CLS) - 15 (GND1)	CLOSE switch is not pressed	10 kΩ or higher
   9 (OPN) - 15 (GND1)	OPEN switch is pressed	Below 1 Ω
   9 (OPN) - 15 (GND1)	OPEN switch is not pressed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Roof Sunshade Switch (Map Light Assembly))

NG → See step   5 

OK → See step   4