Inspection Procedure

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

NOTE:

Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not using hand-held tester.

Check precharge pump motor operation.
Preparation:
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the ACTIVE TEST mode on the hand-held tester.
Check: the operation sound of the precharge pump motor when operating it with the hand-held tester.

OK: The operation sound of the precharge pump motor should be heard.

NG: Go to step 3.

OK: If the same code is still output after the DTC is deleted, check the contact condition of each connection. If the connections are normal, the ECU may be defective.
Check precharge pump motor operation.
Preparation: Disconnect the connector from the precharge pump motor.

Check: Connect ML+ (2) terminal to the battery positive (+) and ML- (1) terminal to the battery negative (-).

Fig 1: Activating Brake Actuator Pump Motor From Pump Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: The operation sound of the pump motor should be heard.

NG: Check and replace precharge pump.

If OK , go to step 3.
Check for open and short circuit in harness and connector between precharge pump and ABS & BA & TRAC & VSC ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .

NG: Repair or replace harness and connector.

OK: Check and replace ABS & BA & TRAC & VSC ECU.