Headlight Cleaner System: Inspection

WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLIGHT CLEANER SWITCH CONTINUITY

Fig 1: Headlight Cleaner Switch Position Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.

Fig 2: Identifying Headlight Cleaner Switch Connector Terminals (Component Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HEADLIGHT CLEANER SWITCH CIRCUIT
Disconnect the switch connector and inspect the connector on wire harness side, as shown.

Fig 3: Identifying Headlight Cleaner Switch Connector (Wire Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Headlight Cleaner Switch Connector Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is not as specified, inspect the circuits connected to other parts.
INSPECT HEADLIGHT CLEANER RELAY OPERATION
1. Check that no continuity exists between terminals 2 and 5.
2. Connect the positive (+) lead from the battery to terminals 1 and 5, and the negative (-) lead to terminal 3.
3. Connect the negative (-) lead from the battery to terminal 4, and check that continuity exists between terminals 2 and 5 for 0.9-1.1 seconds, then no continuity exists.
  If operation is not as specified, replace the motor.
  
  Fig 5: Inspecting Headlight Cleaner Relay Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HEADLIGHT CLEANER RELAY CIRCUIT
Disconnect the connector from the relay and inspect the connector on wire harness side, as shown.

Fig 6: Identifying Headlight Cleaner Relay (Wire Harness Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 7: Headlight Cleaner Relay Connection Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is not as specified, inspect the circuits connected to other parts.
INSPECT HEADLIGHT CLEANER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the motor operates.

NOTE: These tests must be performed quickly (within 20 seconds) to prevent the coil from burning out.

If operation is not as specified, replace the motor.

Fig 8: Inspecting Headlight Cleaner Motor Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HEADLIGHT CLEANER MOTOR CIRCUIT
Disconnect the connector from the cleaner motor and inspect the connector on wire harness side, as shown.

Fig 9: Identifying Headlight Cleaner Motor Connector (Wire Harness Side)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 10: Headlight Cleaner Motor Circuit Connection Condition Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If circuit is not as specified, inspect the circuits connected to other parts.