Toyota RAV4 manuals

Toyota Sienna Service Manual: Unlock Warning Switch Circuit

DESCRIPTION

The unlock warning switch detects if the key is in the ignition key cylinder.

The unlock warning switch turns on when the key is inserted into the ignition key cylinder and turns off when the key is removed from the cylinder.

The body ECU is connected to the unlock warning switch via terminal KSW and key detection status signals are input to the ECU.

The body ECU applies voltage to the unlock warning switch via terminal KSW. When the unlock warning switch is on (there is continuity between the switch terminals), a signal indicating that the key is in the ignition key cylinder is input to the body ECU. When the switch is off (there is no continuity between the switch terminals), a signal indicating that the key is not in the cylinder is input.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 READ VALUE OF DATA LIST (UNLOCK WARNING SWITCH)

  1. Check the DATA LIST to ensure proper function of the door unlock detection switch.

BODY:

BODY

OK: The display is as specified in the normal condition.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2 INSPECT UNLOCK WARNING SWITCH ASSEMBLY

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

  1. Remove the unlock warning switch assembly.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

3 CHECK WIRE HARNESS (UNLOCK WARNING SWITCH - DRIVER SIDE J/B)

CHECK WIRE HARNESS (UNLOCK WARNING SWITCH - DRIVER SIDE J/B)

  1. Disconnect the K4 unlock warning switch assembly connector.
  2.  Disconnect the B6 driver side J/B connector.
  3.  Measure the resistance according to the value(s) in the table below.

Standard resistance

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Data list / active test
1. READ DATA LIST HINT: Using the intelligent tester's DATA LIST allows switch, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshootin ...

Transmitter battery
REPLACEMENT 1. REMOVE TRANSMITTER BATTERY NOTICE: Special caution should be taken for handling each component as they are precision electronic components.  Using a coin or the equiva ...

Other materials:

How to proceed with troubleshooting
HINT: *: Use the intelligent tester. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS Confirm problem symptoms 3 CHECK MULTIPLEX COMMUNICATION SYSTEM* Check if the multiplex communication system DTC is output. HINT: The center airbag sensor assembly of this system is co ...

Data list / active test
1. READ DATA LIST HINT: Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be disco ...

When towing full-time 4wd vehicles
Use one of the methods shown below to tow the vehicle. If the vehicle has trouble with the chassis or drive train, use method 1 (flat bed truck). WHEN TOWING FULL-TIME 4WD VEHICLES NOTICE: Do not use any towing method other than those shown above. The towing methods shown b ...

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