Electrical System; Specifications; Battery; Testing Electrical Components - KYMCO MXU 450i Service Manual

Electrical System
This section has been organized into sub-sections
which show procedures for the complete servicing of
the KYMCO ATV electrical system.
• NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
General Instructions
The ignition control module or ECU maybe damaged if
dropped or the connector is disconnected when the key
is ON, the excessive voltage may damage the ignition
control module or ECU. Always turn off the ignition
switch before servicing.
A faulty ignition system is often related to poor
connections. Check those connections before
proceeding.
Some electrical components may be damaged if
terminals or connectors are connected or
disconnected while the ignition switch is ON
and current is present.
Specifications
Spark Plug Type NGK CR7E
Spark Plug Gap 0.7-0.8 mm (0.028-0.032 in.)
Spark Plug Cap 4000-6000 ohms
Ignition Coil (primary) Less than 1 ohm
Resistance (terminal to terminal )
(secondary)
2900-3400 ohms (high tension-
plug cap removed- to ground)
Ignition Coil
(primary/COl) 250-375 DC volts
Peak Voltage (black/yellow to black)
Stator Coil (trigger) 90-110 ohms (greenAnlhite to
Resistance (charging) blue/yellow) Less than
I
(yellow to yellow)
1
ohm
Peak Voltage (trigger) 7.8-9.3 volts (green to blue)
AC Generator (no load )
Output
60 AC volts@ 3000 RPM
(black to black)
Generator Output (approx) 220W@ 5000 RPM
Battery
For battery related information, see Section 2.
5-2
Testing Electrical
Components
All of the electrical tests should be made using the
Fluke Model 73 Multimeter and when testing peak
voltage, the Peak Voltage Reading Adapter must be
used. If any other type of meter is used, readings may
vary due to internal circuitry. When troubleshooting a
specific component, always verifY first that the fuse(s)
are good, that the bulb(s) are good, that the connec-
tions are clean and tight, that the battery is fully
charged, and that all appropriate switches are acti-
vated.
• NOTE: For absolute accuracy, all tests should be
made at room temperature of 68° F.
Accessory
Receptacle/Connector
• NOTE: This test procedure is for either the recep-
tacle or the connector.
VOLTAGE
1. Tum the ignition switch to the ON p osition; then
set the meter selector to the DC Voltage position.
2. Connect the red tester lead to the red wire; then
connect the black tester lead to ground.
3. The meter must show battery voltage.
• NOTE: If the meter shows no battery voltage,
troubleshoot the battery, fuse, receptacle, connec-
tor, or the main wiring harness.