Inspection Procedure

PREPARATION: 

Remove the ECU-IG fuse from the driver side J/B.

CHECK: 

Check the continuity of the ECU-IG fuse.

Fig 1: DTC C1241/41 Checking ECU-IG Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Continuity 

1. NG: Replace ECU-IG fuse. 
2. OK: Go to Next Step 

OK: 

1. Voltage: 10 - 14 V 

1. NG: Check and repair charging system. See  GENERATORS & REGULATORS  . 
2. OK: Go to Next Step 

In case of using the hand-held tester: 

PREPARATION: 

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and press the hand-held tester main switch ON.
3. Select the DATALIST mode on the hand-held tester.

CHECK: 

Check the voltage condition output from the ECU and displayed on the hand-held tester.

OK: 

1. "Normal" is displayed. 

In case of not using the hand-held tester: 

PREPARATION: 

Disconnect the ABS ECU connector.

CHECK: 

1. Turn the ignition switch ON.
2. Measure the voltage between terminals 25 and 2 or 24 of the ABS ECU connector.
   Fig 2: DTC C1241/41 Checking Voltage Of IG Power Source

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

1. Voltage: 10 - 14 V 

1. OK: Check or replace ABS actuator assembly. 
2. NG: Go to Next Step 

CHECK: 

Measure the resistance between terminals 2 and 24 of the ABS ECU connector and the body ground.

OK: 

1. Resistance: 1 Ω or less 

1. NG: Repair or replace harness or connector. 
   Fig 3: DTC C1241/41 Checking Continuity Of ABS ECU Connector And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. OK: Check for open circuit in harness and connector between ABS ECU and ECU-IG fuse.