Delay Timer (Fuel Injected Engines − Efi) - Toro Workman GTX Service Manual

Delay Timer (fuel injected engines − EFI)
To prevent the engine ECU from switching ON/OFF
rapidly when using the accelerator pedal start feature,
a delay timer works with the ECU relay to keep the ECU
energized for 30 seconds after the engine stops (mag-
neto grounded). The delay timer is attached to the dash
bracket near the brake master cylinder (Fig. 20).
Testing
1. Park vehicle on a level surface, stop engine, engage
parking brake and remove key from the key switch.
Place vehicle shift lever in the NEUTRAL position.
2. Raise hood to gain access to relays.
3. Disconnect the wire harness connector from the
timer. You may want to remove the timer from the vehicle
for easier testing.
4. At the delay connecter, ground timer terminal 2 and
apply +12 VDC to terminal 3 (Fig. 21). Connect multime-
ter leads (DC voltage setting) to terminals 1 and 2. The
multimeter should read 0 VDC.
5. Apply +12 VDC to terminal 4, 12 VDC should appear
on the multimeter. Remove the power to terminal 4 only,
12 VDC should continue to appear on the multimeter for
30 seconds before the multimeter returns to 0 VDC.
6. Disconnect the voltage and multimeter leads.
7. If the timer tests correctly and a circuit problem still
exists, check main wire harness and ECU relay for prob-
lems.
8. Replace the timer if testing determines that it is faulty.
9. After timer testing is complete, install the timer and
connect the wire harness.
10.Lower and secure the hood.
Electrical System
G248242
1. Delay timer
1
G248263
1. Delay timer connecter
2. 12 VDC power supply
Page 5 − 18
1
2
Figure 20
2. Brake master cylinder
4 1
3 2
+
12 VDC
2
Figure 21
3. Multimeter probe
Workman GTX Gasoline
12 VDC
3