Inspection Procedure

Check for open and short circuit in harness and connector between terminal NEO of skid control ECU and terminal NEO of ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG: Repair or replace harness and connector.
2. OK: Go To Next Step
Measure voltage between terminal NEO of ECM and body ground.
CHECK:

Measure the voltage between terminal NEO of the ECM and body ground for the engine conditions below.

OK:

Fig 1: Measuring Voltage Between Terminal NEO Of ECM And Body Ground (1 Of 2)
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Fig 2: Measuring Voltage Between Terminal NEO Of ECM And Body Ground (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: NEO Of ECM And Body Ground Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Replace ECM.
2. OK: If same code is still output after DTC is deleted, check contact condition of each connection.