Toyota RAV4 Service Manual: Passenger airbag on / off indicator circuit malfunction
Description
The passenger airbag on / off indicator circuit consists of the center airbag sensor and the heater control panel*1 or *2.
This circuit indicates the operation condition of the front passenger airbag, the front passenger side airbag and passenger side seat belt pretensioner.
Dtc b1660/43 is set when a malfunction is detected in the passenger airbag on / off indicator circuit.
Hint:
- *1: For automatic air conditioning system
- *2: For manual air conditioning system
Wiring diagram
Inspection procedure
- Check passenger airbag on/off indicator operation
- Turn the ignition switch on.
- Check the passenger airbag on / off indicator operation.
Result
- Check connection of connector
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Check that the connectors are properly connected to the center airbag sensor and the front passenger seat belt warning light.
Ok: the connectors are properly connected.
- Check front passenger airbag on/off indicator light
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Disconnect the connector from the center airbag sensor.
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Check the passenger airbag on / off indicator operation.
Ok: neither on nor off passenger airbag on / off indicator comes on.
- Check instrument panel wire (for open)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Disconnect the connector from the front passenger airbag on / off indicator light.
- Using a service wire, connect e45-23 (paon) and e45- 17 (p-ab) of connector b.
Notice:
Do not forcibly insert the service wire into the terminals of the connector when connecting.
- Measure the resistance of the wire harness side connectors.
Standard resistance
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Check instrument panel wire (for short)
- Disconnect the service wire from connector b.
- Measure the resistance of the wire harness side connectors.
Standard resistance
- Check instrument panel wire (to b+)
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Measure the voltage of the wire harness side connectors.
Standard voltage
- Check instrument panel wire (to ground)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Measure the resistance of the wire harness side connectors.
Standard resistance
Replace front passenger airbag on/off indicator light
- Check connection of connector
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Check that the connectors are properly connected to the center airbag sensor and the heater control panel*1 or clock*2.
Ok: the connectors are properly connected.
- Check instrument panel wire (for open)
- Disconnect the connector from the front passenger airbag on / off indicator light
- Using a service wire, connect e45-23 (paon) and e45- 17 (p-ab) of connector b.
Notice:
Do not forcibly insert the service wire into the terminals of the connector when connecting.
- Measure the resistance of the wire harness side connectors.
Standard resistance
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Check instrument panel wire (for short)
- Disconnect the service wire from connector b.
- Measure the resistance of the wire harness side connector.
Standard resistance
- Check instrument panel wire (to b+)
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Measure the voltage of the wire harness side connector.
Standard voltage
- Check instrument panel wire (to ground)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Measure the resistance of the wire harness side connector.
Standard resistance
- Check wire harness (power source)
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Measure the voltage of the wire harness side connector
Standard voltage
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Check front passenger airbag on/off indicator light
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
- Disconnect the connector from the heater control panel*1 or clock sub-assembly*2.
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Using a service wire, connect e23-6*1 e22-4*2 (paon) and e23-7*1 e22-5*2 (gnd) of the heater control panel *1 or clock*2.
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Using a service wire, connect e23-13*1 e22-9*2 (p-ab) and e23-7 *1 e22-5*2 (gnd) of the heater control panel *1 or clock*2.
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Turn the ignition switch on
- Check the passenger airbag on / off indicator operation.
Ok: front passenger airbag on / off indicator comes on
- Check center airbag sensor assembly
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Hint:
*1: For automatic air conditioning system
*2: For manual air conditioning system
- Connect the connector to the center airbag sensor.
- Connect the connector to the heater control panel*1 or clock*2.
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on, and wait for at least 60 seconds.
- Clear the dtcs (see page rs-49).
- Turn the ignition switch off.
- Turn the ignition switch on, and wait for at least 60 seconds.
- Check for dtcs (see page rs-49).
Ok: dtc b1660/43 is not output.
Hint:
Dtcs other than b1660/43 may be output at this time, but they are not related to this check.
Use simulation method to check
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Other materials:
Problem symptoms table (2005/11-2006/01)
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...
Seat position sensor
Components
On-vehicle inspection
Check seat position sensor (vehicle not
involved in collision)
Perform a diagnostic system check (see page rs-
49).
Check seat position sensor (vehicle
involved in collision)
Perform a diagnostic system check (see page rs-
49).
Ev ...
Fail-safe chart
Fail-safe function
When communication fails in any of the main wires
(communication lines) due to a short circuit or other
causes, the fail-safe function, which is specified for
each system, operates to prevent the system from
malfunctioning.
The table below shows the effects on e ...
