DTC B1661/44: Roll Over Cut Off Indicator Malfunction (08/2010 - 08/2011): Procedure

Fig 1: Identifying Combination Meter Connector Terminal E77

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Remove the combination meter with the connector connected.
4. Disconnect the connector from the center airbag sensor.
5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E77-1 (R/O) - Body ground	Engine switch on (IG)	11 to 14 V

NG → See step   7 

OK: Go to next step 

Fig 2: Identifying Combination Meter Connector Terminal E77 And Center Airbag Sensor Connector Terminal K27

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Disconnect the connector from the center airbag sensor and combination meter.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E77-1 (R/O) - K27-19 (RMIL)	Always	Below 1 Ω
   E77-1 (R/O) - Body ground	Always	1 MΩ or higher

5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E77-1 (R/O) - Body ground	Engine switch on (IG)	Below 1 V

NG → See step   5 

OK: Go to next step 

Fig 3: Identifying Curtain Shield Airbag Cutoff Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Remove the curtain shield airbag cutoff switch. Refer to REMOVAL .
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   4 (OFF) - 1 (RSCA)	Curtain shield airbag cutoff switch is in on position	Below 1 Ω
   4 (OFF) - 1 (RSCA)	Curtain shield airbag cutoff switch is in off position	1 MΩ or higher

NG → See step   8 

OK: Go to next step 

Fig 4: Identifying Curtain Shield Airbag Cutoff Switch Circuit

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Disconnect the connector from the center airbag sensor and curtain shield airbag cutoff switch.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L27-21 (RMSW) - E78-4 (OFF)	Always	Below 1 Ω
   E78-4 (OFF) - Body ground	Always	1 MΩ or higher
   E78-1 (RSCA) - Body ground	Always	Below 1 Ω

5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E78-4 (OFF) - Body ground	Engine switch on (IG)	Below 1 V
   E78-1 (RSCA) - Body ground	Engine switch on (IG)	Below 1 V

NG → See step   6 

OK → See step   9 

Fig 5: Identifying Center Airbag Sensor K27 & Instrument Panel Wire EK3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Disconnect the floor wire connector from the instrument panel wire.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   EK3-3 - K27-19 (RMIL)	Always	Below 1 Ω
   EK3-3 - Body ground	Always	1 MΩ or higher

5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   EK3-3 - Body ground	Engine switch on (IG)	Below 1 V

NG → REPLACE FLOOR WIRE 

OK → REPLACE INSTRUMENT PANEL WIRE 

Fig 6: Identifying Instrument Panel Wire Connector Terminal EL2 And Center Airbag Sensor Connector Terminal L27

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Disconnect the No. 2 floor wire connector from the instrument panel wire.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   EL2-4 - L27-21 (RMSW)	Always	Below 1 Ω
   EL2-4 - Body ground	Always	1 MΩ or higher

5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   EL2-4 - Body ground	Engine switch on (IG)	Below 1 V

NG → REPLACE NO. 2 FLOOR WIRE 

OK → REPLACE INSTRUMENT PANEL WIRE