DTC B1233: Jam Protection Limit Switch Circuit on Passenger Door; DTC B1234: Jam Protection Pulse Switch Circuit on Passenger Door: Procedure

1. Lower the passenger door power window from the fully closed position to the fully open position. Check if the DTC is erased.
   RESULT
   
   

   Result	Proceed to
   DTC is not erased	A
   DTC is erased	B

   HINT: 

   If the DTC is erased, it is possible that the multiplex network door ECU front RH incorrectly detected this DTC previously.

B → END 

A: Go to next step 

1. Reset the power window regulator motor. Refer to INITIALIZATION .
2. Check if the power window AUTO UP / DOWN function operates normally.

   OK

   AUTO UP / DOWN function operates normally.

OK → END 

NG: Go to next step 

1. Check the Data List for proper functioning of the limit switch.
   MULTIPLEX NETWORK DOOR ECU FRONT RH
   
   

   Item	Measurement Item / Display (Range)	Normal Condition
   LIMIT SW	Jam protection limit switch / ON or OFF	ON: Jam protection limit switch operates OFF: Jam protection limit switch does not operate

   OK

   ON (jam protection limit switch operates) appears on screen.

OK → REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 

NG: Go to next step 

Fig 1: Identifying P11 And P16 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the P11 ECU connector.
2. Disconnect the P16 motor connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   P11-10 (LMT) - P16-4 (LMT)	Below 1 Ω
   P11-21 (PLS) - P16-3 (PLS)	Below 1 Ω
   P11-11 (SGND) - P16-5 (E)	Below 1 Ω
   P11-10 (LMT) or P16-4 (LMT) - Body ground	10 kΩ or higher
   P11-21 (PLS) or P16-3 (PLS) - Body ground	10 kΩ or higher
   P11-11 (SGND) or P16-5 (E) - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Temporarily replace the multiplex network door ECU front RH with a new or normally functioning one.
2. Check that a DTC is not output.

   OK

   DTC is not output.

NG → REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH 

OK → END (ECU DEFECTIVE)