DTC B2342: Switch Failure [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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.

   Body Electrical > Sliding Roof > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Open Switch Failure(Past)	Open switch failure signal (Past)	ON or OFF	ON: Sliding roof open switch failure signal (Past) OFF: No sliding roof open switch failure signal (Past)	-
   Close Switch Failure(Past)	Close switch failure signal (Past)	ON or OFF	ON: Sliding roof close switch failure signal (Past) OFF: No sliding roof close switch failure signal (Past)	-
   Up Switch Failure(Past)	Up switch failure signal (Past)	ON or OFF	ON: Sliding roof up switch failure signal (Past) OFF: No sliding roof up switch failure signal (Past)	-
   Down Switch Failure(Past)	Down switch failure signal (Past)	ON or OFF	ON: Sliding roof down switch failure signal (Past) OFF: No sliding roof down switch failure signal (Past)	-
   Open Switch Failure(Current)	Open switch failure signal (Current)	ON or OFF	ON: Sliding roof open switch failure signal (Current) OFF: No sliding roof open switch failure signal (Current)	-
   Close Switch Failure(Current)	Close switch failure signal (Current)	ON or OFF	ON: Sliding roof close switch failure signal (Current) OFF: No sliding roof close switch failure signal (Current)	-
   Up Switch Failure(Current)	Up switch failure signal (Current)	ON or OFF	ON: Sliding roof up switch failure signal (Current) OFF: No sliding roof up switch failure signal (Current)	-
   Down Switch Failure(Current)	Down switch failure signal (Current)	ON or OFF	ON: Sliding roof down switch failure signal (Current) OFF: No sliding roof down switch failure 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)

Result: 

"OFF" appears on the Techstream screen 

REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU):  REMOVAL [10/2015 - ] 

Result: 

"ON" appears on the Techstream screen 

See step  2

1. Disconnect the Q8 sliding roof drive gear sub-assembly (sliding roof ECU) connector.
2. Disconnect the Q16 map light assembly (sliding roof control switch) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q8-7 (OPN) - Body ground	Always	10 kΩ or higher
   Q8-6 (DWN) - Body ground	Always	10 kΩ or higher
   Q8-5 (CLS) - Body ground	Always	10 kΩ or higher
   Q8-4 (UP) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the map light assembly (sliding roof control switch).

   Refer to REMOVAL [10/2015 - ]

   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
   16 (UP) - 20 (GND)	UP switch is pressed	Below 1 Ω
   16 (UP) - 20 (GND)	UP switch is not pressed	10 kΩ or higher
   17 (DOWN) - 20 (GND)	DOWN switch is pressed	Below 1 Ω
   17 (DOWN) - 20 (GND)	DOWN switch is not pressed	10 kΩ or higher
   7 (OPN) - 20 (GND)	OPEN switch is pressed	Below 1 Ω
   7 (OPN) - 20 (GND)	OPEN switch is not pressed	10 kΩ or higher
   8 (CLS) - 20 (GND)	CLOSE switch is pressed	Below 1 Ω
   8 (CLS) - 20 (GND)	CLOSE switch is not pressed	10 kΩ or higher

Result: 

OK 

REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU). Refer to  DISASSEMBLY [12/2012 - ] 

Result: 

NG 

REPLACE MAP LIGHT ASSEMBLY (SLIDING ROOF CONTROL SWITCH):  REMOVAL [10/2015 - ]