niu N-GT, Service Manual

Page: 62 / 144

V1.0.0 62
How to check Main Harness communication wire for closed circuit (Ref: 005)
Check communication between ECU and Battery
Step 1: Disconnect the main Battery
Step 2: Disconnect the ECU connector
Step 3: Connect negative pin of multimeter to pin 5 (White) of ECU female connector
Step 4: Connect positive pin of multimeter to the pin of power cord shown above( white and grey)
Step 5: Set multimeter to test closed circuit mode which should beep if the circuit is closed.
Alternative Method: Please refer to <How to Read Vehicle Communication Data> of H1 User
Guide.
Check communication between ECU and FOC controller
Step 1: Disconnect the main Battery
Step 2: Disconnect the ECU connector
Step 3: Connect negative pin of multimeter to pin 3 (grey and violet) of ECU female connector
Step 4: Connect positive pin of multimeter to the pin 23 of FOC controller connector(grey and
violet)
Step 5: Set multimeter to test closed circuit mode which should beep if the circuit is closed.
Alternative Method: Please refer to <How to Read Vehicle Communication Data> of H1 User
Guide.
Caution: Please be very careful when checking the FOC controller connector, insert only Thin pin to
for check up. Do Not damage the connector which may cause bad connection.