Inspection Procedure

1. Check for open and short circuit in harness and connector between terminal NEO of skid control ECU and ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : GO TO NEXT STEP 

1. Remove the skid control ECU with connector still connected.
2. Turn the ignition switch ON.
3. Measure voltage between terminal NEO of skid control ECU and body ground for the engine conditions below.

   OK: 

   VOLTAGE
   
   

   Engine condition	Voltage
   OFF (IG ON)	10 - 14 V or below 1 V
   ON (Idling)	10 - 14 V <=> below 1 V (Pulse)

   Fig 1: Measuring Voltage Between Terminal NEO Of Skid Control ECU & Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Voltage Pulse Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : CHECK AND REPLACE ECM OR SKID CONTROL ECU 

OK : CHECK EACH CONNECTION IF SAME CODE IS STILL OUTPUT AFTER DTC DELETION (IF NORMAL, THE SKID CONTROL ECU MAY BE DEFECTIVE)