Installation manual

PROBLEM
ELECTRICAL TROUBLESHOOTING GUIDE
The following test procedures will require the use of a multimeter and the
engine's wiring diagram (in this manual). Also refer to the relay testing
page. WESTERBEKE recommends that these tests be performed by a
qualified technician.
TESTING
INSPECTION/SOLUTION
(12 VDC is battery+ voltage measured to ground)
Engine does not crank .......
Test for B+ (12v) at the circuit breaker to the PC
board terminal T4.
Check for bad connections at the engine harness
connector P1, the red wire, or at the battery + on
the starter. Check the connections at the PC board
terminal 4 and at the circuit breaker.
If OK.
Test for B+ (12v) at the circuit breaker to the panel Look for a bad connection from the circuit breaker
fuse end and to the PC board terminal T2. to the fuse or at the PC board terminal T2.
If OK • Replace the circuit breaker.
Test for B+(12v) from the fuse end to the PC board
terminal T1.
If OK.
Test for B+(12v) at the relay K1 terminal 30.
If OK.
Test for B+ (12v) at the starVstop switch terminals
2 and 10.
If OK.
Test for B+ (12v) at the start switch terminal1
when the switch is activated.
If OK.
Test for B+ (12v) at relay K1, terminal 86.
If OK.
If OK.
Test for B+(12v) at relay K1 terminal 85. Activate
the start switch and after a few seconds the voltage
should drop below .5 volts.
If OK.
Inspect the connections at the fuse or PC board
terminal T1. Replace the fuse.
Check for a bad connection at the engine harness
connector P1, pin 3. The red/white wire or at K1,
K2, terminal 30.
Look for bad connections at the panel connector
S2, pin 1, white/black/red wire to the terminal
PC board or at the starVstop switch terminals 2
and 10.
Replace the start switch.
Check for bad connections at the panel connector
S2, pin 3, green wire to the PC board. Then check
the engine harness connection at the connector
P1, pin 7-grey wire.
Inspect connections on jumpers on the terminal
strip TS1 or between any external contacts
connected to TS1. Replace the PC board.
Inspect for a bad connection at relay K1 terminal 8
orange wire or at ECU connector P2, pin2.
Replace the ECU
Activate the start switch, after 4-5 seconds B+(12v) Look for a bad connection at relay K1.
should be present at terminal 87 on relay K1.
If OK.
Activate the start switch, after 4-5 seconds check for Look for a bad connection at relay K1, terminal 85
B+(12v) at the start solenoid. orange wire or at the ECU connector P2 pin.
If OK • Replace the ECU.
Inspect the starter. Check the connections at relay K1 terminal 87.
yellow/red wire or at the start solenoid.
Replace the starter.
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