DTC B1662/45: Indicator Light Circuit Malfunction (08/2010 - 08/2011): Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .
   RESULT
   
   

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

B → See step   7 

A: Go to next step 

1. Measure the voltage of the battery.

   Standard voltage

   11 to 14 V

NG → See step   8 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Check that the connectors are properly connected to the center airbag sensor and combination meter.

   OK

   The connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

Fig 1: Identifying Center Airbag Sensor Connector Terminal E47

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the connectors from the center airbag sensor.
2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
3. Turn the engine switch on (IG).
4. Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E47-21 (IG2) - E47-25 (E1)	Engine switch on (IG)	11 to 14 V
   E47-21 (IG2) - E47-26 (E2)	Engine switch on (IG)	11 to 14 V

NG → REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Combination Meter Connector Terminal E77

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
2. Disconnect the E77 connector from the combination meter.
3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E77-30 (IG+) - E77-26 (ET)	Engine switch on (IG)	11 to 14 V

NG → REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Connect the connector to the combination meter.
4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
5. Turn the engine switch on (IG).
6. Check the SRS warning light condition.

   OK

   After the primary check period, SRS warning light goes off for approximately 10 seconds and then remains on.

   HINT: 

   The primary check period is approximately 6 seconds after the engine switch is turned on (IG).

NG → See step   9 

OK → See step   10