Inspection Procedure

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 the hand-held tester.

Check ABS MTR relay operation .
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 ABS MTR relay individually when operating it with the hand-held tester.

OK: The operation sound of the ABS MTR relay should be heard .
1. OK: Go to step 4 .
2. NG: Go to next step .
Check battery positive voltage .
OK: Voltage: 10 - 14 V
1. OK: Go to next step .
2. NG: Check and repair the charging system. See CHARGING .
Check voltage between terminal 1 of engine room R/B No. 7 (for ABS MTR relay) and body ground .
Remove the ABS MTR relay from engine room R/B No. 7.

Measure the voltage between terminal 1 of engine room R/B No. 7 (for ABS MTR relay) and body ground.

Fig 1: Reading Voltage AT Terminal 1 Of Engine Room R/B No. 7
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Voltage: 10 - 14 V
1. OK: Go to next step .
2. NG: Check and repair harness or connector .
Check ABS MTR relay .
Check continuity between following terminals of MTR relay. See Fig 2.

Fig 2: Testing ABS MTR Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: See Fig 3 .

Fig 3: ABS MTR Relay Specifications (No Voltage Applied)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Apply battery positive voltage between terminals 3 and 4.
2. Check continuity between terminals.
OK: See Fig 4 .

Fig 4: ABS MTR Relay Specifications (Voltage Applied)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Go to next step .
2. NG: Replace ABS MTR relay .
Check continuity between terminal BM (2) of engine room R/B No. 7 (for ABS MTR relay) and terminal MT (82) of Skid Control ECU .
Disconnect the connector from the Skid Control ECU.

Check continuity between terminal BM (2) of engine room R/B No. 7 and terminal MT (82) of Skid Control ECU harness side connector.

Fig 5: Testing ABS MTR Relay Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Continuity
1. OK: Go to next step .
2. NG: Repair or replace harness .
Check for open and short circuit in harness and connector between ABS MTR relay and Skid Control ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
1. OK: Go to next step .
2. NG: Repair or replace harness or connector .
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 .