Pioneer 1200 Maintenance Service Manual page 151

TROUBLESHOOTING AND ELECTRICAL SYSTEM: FE400 ENGINE
WAVETEK 5XL
V V
OFF
1000 500
200
200
20
200
2 2m
200 20
m
m
200
2000
k m
200k
20k 200
Ω
2k A
Ω
!
V ! COM 200nA
MAX
1000 ---
FUSED
750V
RED WIRE
DIODE
Figure 11-37 Diode Test
TEST PROCEDURE 11 – STARTER/GENERATOR (GENERATOR FUNCTION)
See General Warning, Section 1, Page 1-1.
NOTE: Perform Test Procedure 10 before proceeding with this test procedure.
Keep the battery connected while performing this test procedure.
1. Turn the key switch OFF and remove the key. Place the Forward/Reverse handle in NEUTRAL. Chock
the wheels.
2. Ensure that the wires are connected correctly and are tight. If they are not, rewire or tighten as necessary.
3. Disconnect the yellow wire from the DF terminal on the starter/generator. Cover the connector on the yel-
low wire to make sure the yellow wire will not short to ground. Then, using a jumper wire, ground the DF
terminal to the A2 terminal (Figure 11-35, Page 11-29).
4. Use a multimeter set to 20 volts DC and place the red (+) probe on the positive (+) post of the battery,
and place the black (–) probe on the negative (–) post. Start the engine and run it at full governed speed.
The reading should show the voltage rising on the meter. If the voltage rises, see Test Procedure 12 –
Voltage Regulator on page 11-31. If the voltage does not rise, and the diode was found to be functioning
properly in Test Procedure 10, a tear-down inspection of the starter/generator will be necessary. See
Starter/Generator Removal, Section 12, Page 12-1.
5. Reconnect the yellow wire to the DF terminal on the starter/generator.
TEST PROCEDURE 12 – VOLTAGE REGULATOR
See General Warning, Section 1, Page 1-1.
NOTE: Perform Test Procedures 10 and 11 before proceeding with this test procedure.
Keep the battery connected while performing this test procedure.
1. Turn the key switch OFF and remove the key. Place the Forward/Reverse handle in NEUTRAL. Chock
the wheels.
2. Check that the wires are connected correctly and are tight. If they are not, rewire or tighten as necessary.
2003 Pioneer 1200/1200SE Gasoline Vehicle Maintenance and Service Manual
WHITE WIRE
WAVETEK 5XL
V V
OFF
1000
500
200 200
20
200
2 2m
200
20
m
m
200
2000
k m
200k
20k 200
Ω
2k A
Ω
!
V ! COM 200nA
MAX
1000 ---
FUSED
750V
DIODE
Figure 11-38 Diode Test – Probes Reversed
11
Test Procedures
Page 11-31