Toro Greensmaster eTriFlex 3360 Service Manual page 198

Identifying the Relays and their Functions (continued)
Testing Relays with 4 Terminals
Electrical System: Testing the Electrical Components
Shutdown Delay Relay (Model 04590) The shutdown delay relay is energized
when the key switch is set to the R
delay relay supplies power to the 12V control circuits (manual parking brake
switch, T1: primary controller outputs, InfoCenter display, CAN bus isolation
module, brake actuator relay switch terminal).
The shutdown delay relay is also used to de-energize the 12V control circuits
before the SC8: lithium-ion battery controller (BMS) takes the 48 VDC lithium-ion
batteries off-line.
1. Park the machine on a level surface, lower the cutting units, set the key
switch to the O position and remove the key.
FF
2. Disconnect the battery negative (-) cable at the 12V system battery (model
04580); refer to Removing and Installing the 12V System Battery (Model
04580) (page 5–105), or unplug the 48V battery disconnect (model 04590);
refer to 48V Battery Disconnect (page
3. Remove the right side cover.
4. Disconnect the wire harness connector from the relay being tested. Check
the relay and the harness connector for damage or corrosion and clean or
repair as necessary. Remove the relay from the mounting panel.
Note: Prior to taking small resistance readings with a digital multimeter, short
the meter test leads together. The meter will display a small resistance value
(usually 0.5 ohms or less). This resistance is due to the internal resistance of
the meter and test leads. Subtract this value from the measured value for
the tested component.
5. Using a multimeter (ohms setting), measure the coil resistance between
terminals 85 and 86.
g291282
RELAY
Logic Relay
Shutdown Delay Relay (Model 04590)
6. Verify infinite resistance (no continuity) exists between terminals 30 and 87.
7. Connect multimeter (ohms setting) leads to relay terminals 30 and 87.
Ground terminal 86 and apply +12 VDC to terminal 85 of the logic relay (12V
coil), or +48 VDC to terminal 85 of the shutdown delay relay (48V coil). The
position. When energized, the shutdown
UN
5–9).
Figure 85
Relays with 4 terminals
12V coil – 68 to 82 ohm
48V coil – 990 to 1210 ohms
Page 5–94
COIL RESISTANCE
Greensmaster® eTriFlex 3360 and 3370
19239SL Rev B