Hitachi UX Twin Nozzle Service Manual page 276

6.2.21a Pump Motor1 Fault
Pump Motor1 Fault
Pull out and insert the connector
・ CN13 of the EZJ133 board
・ CN1 and CN4 of the EZJ138 board
・ pump motor
connector.
Does the fault recur?
Yes
Replace the pump motor1. *1
Does the fault recur?
Yes
(*1): When you replace Pump1 motor, refer to "4.8.4 Motor replacement".
(*2): When you replace EZJ133 board, refer to
board (MPU board)".
[Caution]
Be sure to check that there is no wrong connection of harnesses by referring to
Identifying method of harnesses]
No
No
Yes
Does the connection
harness have electrical
continuity?
No
Replace the connection harness
Does the fault recur?
Yes
Replace the EZJ133 board. *2
[Replacement procedures of EZJ133 board]
"3.3.20 Electrical Connection Diagram".
in
6-34
No
Resume the
.
operation
"3.3.1 EZJ133
in
[Connector numbers and