Troubleshooting
MERGE 10-7
Chapter 10
Check Procedure 7--Controller signal
Check Procedure 7A—Pin 1
1．Use a multimeter set at 200V DC, insert the red (+) probe of the multimeter into Pin 1 (red wire).
Refer to the following Note. Connect the black (-) probe to the negative binding post of the battery
pack.
2．Turn Tow/Run switch to RUN, then the multimeter should display a full battery voltage (about 48V).
3．If another reading is displayed, the following items must be checked:
• Continuity of wires in harness;
• Check whether Tow/Run switch operates normally. Refer to “Check Procedure 4 - TOW/RUN
switch”
Δ NOTE:
• Never insert the complete probe into the 9-wire plug for fear of poor contact.
9-wire connector of controller plug Function
(Pin 1)-red wire Battery - positive electrode
(Pin 2)- yellow wire
Input signal of motor speed sensor - a pulse input signal
provided to controller by motor speed sensor.
(Pin 4) - black/yellow wire
FORWARD input signal provided by Forward/Reverse
switch--when Forward/Reverse switch is on FORWARD
position, the switch provides a voltage of +48V to the
controller.
(Pin 5) - blue/white wire
REVERSE input signal provided by Forward/Reverse
switch--when Forward/Reverse switch is on REVERSE
position, the switch provides a voltage of +48V to the
controller.
(Pin 7) - black/white wire
An input signal of 0-4.6V provided to the controller by
accelerator
(Pin 6) - red/green wire
Key switch input signal--when the key switch is ON, the switch
provides a voltage of +48V to the controller.
(Pin 3)-pink wire
Pedal switch – when the accelerator pedal is depressed, the
accelerator limit switch provide a voltage of +48V to the
controller.
(Pin 10) - brown/yellow wire
Buzzer output signal - output signal provided to reverse
buzzer by controller.
(Pin 14)-light green wire Mode switch signal, provide two types of mode conversion
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