5-S9
ZD321, ZD326, ZD331, WSM
ELECTRICAL SYSTEM
(4) Starter
Motor Test
CAUTION
• Secure the starter to prevent it from jumping up and down
while testing the motor.
1. Disconnect the battery negative cable from the battery.
2. Disconnect the battery positive cable and the leads from the
starter.
3. Remove the starter from the engine.
4. Disconnect the connecting lead (2) from the starter C terminal
(1).
5. Connect a jumper lead from the connecting lead (2) to the battery
positive terminal post.
6. Connect a jumper lead momentarily between the starter motor
housing and the battery negative terminal post.
7. If the motor does not run, check the motor.
W1018134
Magnet Switch Test (Pull-in, Holding Coils)
• Each test should be carried out for a start time (3 to 5
seconds), and at half of the rated voltage (6V)
1) Checking Pull-in Coil
1. Connect jumper lead from the battery’s negative terminal post to
the C terminal.
2. The plunger should be attached strongly when a jumper lead is
connected from the battery positive terminal to the S terminal.
2) Checking Holding Coil
1. Connect jumper leads from the battery’s negative terminal post
to the body and the battery’s positive terminal post to the S
terminal.
2. Push the plunger in by hand and release it. Then, the plunger
should remain being attracted.
W1018490
(5) Glow Plug
Lead Terminal Voltage
1. Disconnect the wiring lead (1) from the glow plug (2) after turning
the main switch off.
2. Turn the main switch key to the “PREHEAT” position, and
measure the voltage between the lead terminal and the chassis.
3. Turn the main switch key to the “START” position, and measure
the voltage with a voltmeter between the lead terminal and the
chassis.
4. If the voltage at either position differs from the battery voltage, the
wiring harness or main switch is faulty.
W1018667
(1) C Terminal (2) Connecting Lead
Voltage
(Lead terminal -
Chassis)
Main switch key at
“PREHEAT”
Approx. battery voltage
Main switch key at
“START”
Approx. battery voltage
(1) Wiring Lead (Positive) (2) Glow Plug