Inspection Procedure

Check battery positive voltage.
OK:
1. Voltage: 10 - 14 V
1. NG: Check and repair the charging system.
2. OK: Go to next step
Check voltage between terminals IG1 and GND of ABS ECU connector.
PREPARATION:

Disconnect ABS actuator connector.

CHECK:
1. Turn the ignition switch ON.
2. Measure voltage between terminals IG1 and GND of ABS actuator harness side connector.
OK:
1. Voltage: 10 - 14 V
1. NG: Go to step 4 .
  
  Fig 1: DTC 41 Checking Voltage Of ABS ECU Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. OK: Go to next step
Check continuity between terminals GND of ABS ECU connector and body ground.
CHECK:

Measure resistance between terminals GND of ABS actuator harness side connector and body ground.

OK:
1. Resistance: 1 Ω or less
1. NG: Repair or replace harness or connector.
2. OK: Go to next step
Fig 2: DTC 41 Checking Continuity Of ABS ECU Connector And Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check ECU-IG fuse.
PREPARATION:

Remove ECU-IG fuse from J/B No. 1.

CHECK:

Check continuity of ECU-IG fuse.

OK:
1. Continuity
  
  Fig 3: DTC 41 Checking ECU-IG Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Check for short in all the harness and components connected to ECU-IG fuse (See attached wiring diagram).
2. OK: Check and replace the ABS ECU.