Ecm Main Relay Inspection - Suzuki DF70A Service Manual

1A-42 Engine General Information and Diagnosis:
Wire
Terminal
color
64 O/W Buzzer cancel
65 Br Starter switch
66 Bl/B OIL lamp
67 —
68 —
69 G/W CHECK ENGINE lamp
70 R/Y IAC Valve #2
71 B/Br No.2 Fuel injector (–)
72 B/R High pressure fuel pump (–)

ECM Main Relay Inspection

Inspect the ECM main relay using the following
procedures:
1) Disconnect the ECM main relay from the fuse box.
1. ECM main relay
2) Check continuity between terminal (2) and (3) each
time 12 V power supply is applied to terminal (4) and
(5).
Connect the positive (+) lead to terminal (5), and
negative (–) lead to terminal (4).
CAUTION
Be careful not to touch 12 V power supply
wires to each other or with other terminals.
Special tool
(A): 09930–99320 (Digital tester)
Tester knob indication
Continuity ( )
Circuit Standard Voltage
Approx. 12 V
Approx. 2.5 V
Approx. 12 V
—
—
Approx. 12 V or 0 V
Approx. 12 V
Approx. 12 V
Z9J0111106003
1
I9J011110054-02
Ignition switch ON. Key pushed in.
Approx. 0 V Ignition switch ON. Key not pushed in.
Ignition switch ON.
Ignition switch START position.
—
—
—
—
Ignition switch ON.
Ignition switch ON.
• Stop switch plate IN, Shift into
NEUTRAL.
Approx. 0 V
For 3 sec after ignition switch ON.
• While engine running.
Engine stopped. Ignition switch ON.
Stop switch plate IN, Shift into NEUTRAL.
ECM main relay function
12 V power applied
12 V power not applied
2
5
12 V
4
3) Measure the resistance between relay terminals (4)
and (5).
If out of specification, replace ECM main relay.
Tester knob indication
Resistance (Ω)
ECM Main relay solenoid coil resistance
Standard: 145 – 190 Ω
(A)
Condition / Remarks
—
—
—
—
Continuity
Yes
No
3
CONT
(A)
I9J011110038-02
I9J011110039-01