B1653/35

DESCRIPTION

The seat position airbag sensor circuit consists of the center airbag sensor assembly and the seat position airbag sensor.
DTC B1653/35 is recorded when a malfunction is detected in the seat position airbag sensor circuit.

DTC No.	DTC Detecting Condition	Trouble Area
B1653/35	The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the seat position airbag sensor circuit for 2 seconds. Seat position airbag sensor malfunction Center airbag sensor assembly malfunction	Floor wire No. 2 Seat position airbag sensor Center airbag sensor assembly

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK DTC

1. Turn the engine switch on (IG), and wait for at least 60 seconds.

2. Clear the DTCs stored in the memory (Click here).

3. Turn the engine switch off.

4. Turn the engine switch on (IG), and wait for at least 60 seconds.

5. Check for DTCs (Click here).

   OK:

   DTC B1653/35 is not output.
   

   HINT:

   Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.

NG	Go to step 2

OK
USE SIMULATION METHOD TO CHECK

2. CHECK CONNECTION OF CONNECTORS

1. Turn the engine switch off.

2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

3. Check that the connectors are properly connected to the center airbag sensor assembly and the seat position airbag sensor.

   OK:

   The connectors are properly connected.
   

NG	CONNECT CONNECTORS, THEN GO TO STEP 1

OK

3. CHECK FLOOR WIRE NO. 2 (OPEN)

1. Disconnect the connectors from the center airbag sensor assembly and the seat position airbag sensor.

2. Using a service wire, connect Q32-14 (DSP+) and Q32-13 (DSP-) of connector "B".

   NOTICE:

   Do not forcibly insert a service wire into the terminals of the connector when connecting.

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

   Standard resistance:

   LHD:

   Tester connection	Condition	Specified condition
   Q6-2 (LSP+) - Q6-4 (LSP-)	Always	Below 1 Ω

   RHD:

   Tester connection	Condition	Specified condition
   P4-2 (RSP+) - P4-4 (RSP-)	Always	Below 1 Ω

NG	REPAIR OR REPLACE FLOOR WIRE NO. 2

OK

4. CHECK FLOOR WIRE NO. 2 (SHORT)

1. Disconnect the service wire from connector "B".

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

   Standard resistance:

   LHD:

   Tester connection	Condition	Specified condition
   Q6-2 (LSP+) - Q6-4 (LSP-)	Always	1 MΩ or higher

   RHD:

   Tester connection	Condition	Specified condition
   P4-2 (RSP+) - P4-4 (RSP-)	Always	Below 1 Ω

NG	REPAIR OR REPLACE FLOOR WIRE NO. 2

OK

5. CHECK FLOOR WIRE NO. 2 (SHORT TO B+)

1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

2. Turn the engine switch on (IG).

3. Measure the voltage according to the value(s) in the table below.
   

   Standard voltage:

   LHD:

   Tester connection	Condition	Specified condition
   Q6-2 (LSP+) - Body ground	Engine switch on (IG)	Below 1 V
   Q6-4 (LSP-) - Body ground	Engine switch on (IG)	Below 1 V

   RHD:

   Tester connection	Condition	Specified condition
   P4-2 (RSP+) - Body ground	Engine switch on (IG)	Below 1 V
   P4-4 (RSP-) - Body ground	Engine switch on (IG)	Below 1 V

NG	REPAIR OR REPLACE FLOOR WIRE NO. 2

OK

6. CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND)

1. Turn the engine switch off.

2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

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

   Standard resistance:

   LHD:

   Tester connection	Condition	Specified condition
   Q6-2 (LSP+) - Body ground	Always	1 MΩ or higher
   Q6-4 (LSP-) - Body ground	Always	1 MΩ or higher

   RHD:

   Tester connection	Condition	Specified condition
   P4-2 (RSP+) - Body ground	Always	1 MΩ or higher
   P4-4 (RSP-) - Body ground	Always	1 MΩ or higher

NG	REPAIR OR REPLACE FLOOR WIRE NO. 2

OK

7. CHECK SEAT POSITION AIRBAG SENSOR

1. Connect the connectors to the center airbag sensor assembly and the seat position airbag sensor.

2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

3. Turn the engine switch on (IG), and wait for at least 60 seconds.

4. Clear the DTCs stored in the memory (Click here).

5. Turn the engine switch off.

6. Turn the engine switch on (IG), and wait for at least 60 seconds.

7. Check for DTCs (Click here).

   OK:

   DTC B1653/35 is not output.
   

   HINT:

   Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.

NG	Go to step 8

OK
USE SIMULATION METHOD TO CHECK

8. REPLACE SEAT POSITION AIRBAG SENSOR

1. Turn the engine switch off.

2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

3. Replace the seat position airbag sensor (Click here).

   HINT:

   Perform inspection using parts from a normal vehicle if possible.

NEXT

9. CHECK CENTER AIRBAG SENSOR ASSEMBLY

1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

2. Turn the engine switch on (IG), and wait for at least 60 seconds.

3. Clear the DTCs stored in the memory (Click here).

4. Turn the engine switch off.

5. Turn the engine switch on (IG), and wait for at least 60 seconds.

6. Check for DTCs (Click here).

   OK:

   DTC B1653/35 is not output.
   

   HINT:

   Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.

NG	REPLACE CENTER AIRBAG SENSOR ASSEMBLY

OK
END