1975 Datsun 280z FSM - Spooled up Racing

1. POWER SUPPLY WIRING
AND BATTERY CHECK
(See wiring diagram
in Figure EE-87)
Procedure:
1. Turn on ignition switch.
2. Connect a circuit tester or an
oscilloscope as shown in the figure
below.
Fig. EE-75
Criterion:
California model
EE376
Checking power supply
wiring and battery
When power source (battery)
voltage is indicated
Lower or no indication
OK
N.G.
If the result is "N.G." - Take the
following measures:
1. Check "BW" and "B" color wire
harness respectively, for proper conductance.
2. Check battery cables for proper
connection.
3. Check charge condition of battery
if an excessively low voltage is
indicated.
2. CONTINUITY CHECK OF
PRIMARY CIRCUIT
2-1. Checking primary
circuit (See wiring diagram
in Fig. EE-88)
Procedure:
1. Disconnect "L" color wire from
ignition unit.
2. Turn on ignition switch.
Engine Electrical System
3. Connect a circuit tester or an
oscilloscope as shown in Figure EE-76.
EE377
Fig. EE-76
Criterion:
;-BW California model
-BW
-B
Checking primary circuit
When normal power source
(battery) voltage is indicated . OK
Lower or no indication N.G.
If the result is "N.G." - Take the
following measures:
1. Check "BW" and "L" color wire
harness respectively for proper conductance.
2. Check resistor and ignition coil
terminals for loose contact.
3. Check resistor and ignition coil
for discontinuity.
4. Check "WB" color wire harness
of ignition coil assembly for proper
continuity.
2-2. Checking ignition coil
assembly (See wiring
diagram in Fig. EE-89)
Procedure:
1. Disconnect engine room harness
from ignition coil external resistor
terminals.
2. Connect a circuit tester as shown
in the figure below.
Resistance: x 1 range
Fig. EE-77
EE304
Checking ignition coil
assembly
EE-34
Criterion:
When approximately 0 ohm is
indicated
More than 1.8 ohm
OK
N.G.
If the result is "N.G." - Replace
ignition coil assembly.
3. RETARDED SIDE PICK-UP
COIL CONTINUITY CHECK
(See wiring diagram in
Figure EE-90)
Procedure:
1. Disconnect "R" and "G" color
wires from ignition unit.
2. Connect a circuit tester as shown
in the figure below:
California model
EE378
-BW
-BW
"B
Non-California model
Resistance: x 10 range
Fig. EE-78 Checking retarded side
pick-up coil
Criterion:
When approximately 720 ohm
is indicated
^
^
OK
Far less than or more than
720 ohm N.G.
If the result is "N.G." - Replace
pick-up coil assembly. (Retarded side)
4. ADVANCED SIDE PICK-UP
COIL CONTINUITY CHECK
Non-California models only)
(See wiring diagram Figure
EE 91)
Procedure:
1. Disconnect "Br" color wire from
ignition unit.
2. Connect a circuit tester as shown
in Figure EE-79.