TGB EST 1000 - Starter Relay Winding Resistance Test; Starter Relay Operational Test; Starter Relay Ground Signal Test; Starter Relay Input Voltage Test

8-1. ELECTRIC SYSTEM
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Starter Relay Operational Test
1. Disconnect both terminals from the starter
relay.
2. Connect pin 1 to the positive battery terminal.
3. Momentarily connect pin 2 to the chassis
ground.
If starter runs, carry out the STARTER RELAY
INPUT VOLTAGE TEST.
If starter does not run, carry out the SATRTER
RELAY WINDING RESISTANCE TEST.
Starter Relay Input Voltage Test
1. Disconnect connector with Black/Yellow wire.
2. Turn ignition switch ON.
3. Measure voltage:
Black/Yellow wire and Battery ground = battery
voltage.
Starter Relay Ground Signal Test
1. Disconnect pin 2 (Orange/Brown) from relay.
2. Turn ignition switch ON.
3. Measure voltage:
Orange/Brown wire and Battery positive post =
Battery voltage.
Starter Relay Winding Resistance Test
Disconnect terminals from relay.
With a multimeter, check primary winding
resistance:
Starter Relay pin 1 and pin 2 =
Approximately 5
Ω .
If measurement is out of specification, replace
relay.
Starter Relay Voltage Drop Test
Turn ignition key ON.
Measure voltage while cranking engine:
Post from battery and post going to starter = 0.2
Vdc max.
If voltage is out of specification, replace relay.