C1225 ABNORMALITY OF ES SOLENOID

1. Firstly, perform the check of "DISCONNECTION OF SOLENOID RELAY (DTC No.C0278)"..

1. Set the starter switch to "LOCK", disconnect the 24 pin connector of ABS actuator.
2. Measure the resistance between 8th and 21th terminals of the 24 pin connector (actuator side).
   Standard: 26-40 Ω
   
   
   　

Abnormality of the ABS actuator.

[2]-3

3. Measure the resistance between13th and 20th terminals of the 24 pin connector (actuator side).
   Standard: 26-40 Ω
   
   
   　

Abnormality of the ABS actuator.

[3] WIRE HARNESS CHECK

1. Disconnect the 22 pin connector of ECU.
2. Measure the resistance between 3rd terminal of the 22 pin connector of ECU (chassis harness side) and 21th terminal of the 24 pin connector of ABS actuator (chassis harness side).
   Standard: Less than 5 Ω
   
   

Abnormality of the wire harness.

[3]-3

3. Measure the resistance between 2nd terminal of the 22 pin connector of ECU (chassis harness side) and 8th terminal of the 24 pin connector of ABS actuator (chassis harness side).
   Standard: Less than 5 Ω
   
   

Abnormality of the wire harness.

[3]-4

4. Measure the resistance between 5th terminal of the 22 pin connector of ECU (chassis harness side) and 20th terminal of the 24 pin connector of ABS actuator (chassis harness side).
   Standard: Less than 5 Ω
   
   

Abnormality of the wire harness.

[3]-5

5. Measure the resistance between 4th terminal of the 22 pin connector of ECU (chassis harness side) and 13th terminal of the 24 pin connector of ABS actuator (chassis harness side).
   Standard: Less than 5 Ω
   
   
   　

Abnormality of the wire harness.

[4] ECU CHECK

1. Connect all the connector, turn the starter switch to "ON".
2. Measure the voltage between 3rd terminal of the 31 pin connector of ECU and 2nd terminal of the 31 pin connector of ECU. (Leaving the connector connected with ECU.)
   Standard: 20-28V
   
   
   　

Abnormality of the ECU power supply voltage.

[4]-3

3. Measure the voltage between 5th terminal of the 22 pin connector and 2nd terminal of the 31 pin connector. (Leaving the connector connected with ECU.)
   Standard: 20-28V
   
   
   　

Abnormality of the ECU power supply voltage.

Normal.

1. Confirm the DTC C1225 is inactive

   • Start the engine and let it idling condition.
   • Verify the DTC C1225 is inactive.

   

2. DTC Clear

   • Clear the DTC with Hino DX
   • Confirm the same DTC is not reoccurred

   

C1225 is reoccur: Return to first process Other DTC appear: Refer to concerned Trouble shooting

Complete