Yamaha Vmax VMX17C 2009 Service Manual page 500

Fault code No.
Item
4 Malfunction in ECU.
Reinstatement method
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Checking method
Probable cause of malfunction
1 Connections
• Meter assembly 2 coupler
• Wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Malfunction in meter assembly 2.
4 Malfunction in ECU.
Reinstatement method
ER-3
ECU internal malfunction (output signal error): data from the
ECU cannot be received correctly.
• Replace the ECU.
Turning the main switch to "ON".
ER-4
ECU internal malfunction (input signal error): non-registered
data has been received from the meter.
Able to start engine
Able to drive vehicle
—
—
—
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect
the coupler securely.
• Repair or replace if there is an open or short
circuit.
• Between meter assembly 2 coupler and ECU
coupler.
(yellow/blue–yellow/blue)
• Replace the meter assembly 2.
• Replace the ECU.
Turning the main switch to "ON".
8-67
FUEL INJECTION SYSTEM
Check or maintenance job