Power Supply Voltage Abnormal (Over-Voltage) - KYMCO Downtown 350i Repair Manual

10..Brake System Downtown 350i
Power Supply Voltage Abnormal (over-voltage) (service
code 53)
1st step test.
Disconnect the ABS diagnosis connector and ABS hydraulic unit
connector.
Check for continuity for the black lead terminal of the main harness side
connector.
2nd step test.
Connect the ABS diagnosis connector and ABS hydraulic unit connector.
Check the battery terminal voltage, connect the diagnosis tool to the ABS
diagnosis connector.
Turn the ignition switch ON.
Battery terminal voltage
Standard: 16.6V or less
3rd step test.
Inspect the following parts.
Battery, ignition switch, main harness and main fuse 10A
4th step test.
Recheck the service code indication; erase the service code, perform the pre-diagnosis
inspection 1 and 2, and retrieve the service code.
If the ABS indicator light lit, faulty ECU in the ABS hydraulic unit. Replace the ABS
hydraulic unit.
If the ABS indicator light unlit. ABS system is normal.
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