Suzuki SY413 Service Manual page 3211

6E3-50 ELECTRONIC FUEL INJECTION SYSTEM (J18 ENGINE WITHOUT WU TWC)
B-10 ELECTRIC LOAD SIGNAL CIRCUITS
STEP
1 Check voltage at "B3" terminal under each condition
given below.
Ignition switch ON and small light
and rear defogger all turned OFF:
Ignition switch ON and small light
or rear defogger turned ON:
Is check result satisfactory?
2 Check voltage at "B9" terminal under each condition
given below.
Ignition switch ON and
heater blower fan turned OFF:
Ignition switch ON and
heater blower fan turned ON:
Is check result satisfactory?
Fig. for STEP 1
ACTION
0 V
10 – 14 V
10 – 14 V
0 V
1. ECM coupler connected
1. ECM
2. ECM coupler
3. Electric load signal diodes (in J/B)
4. From lighting switch (small)
5. From rear defogger switch
6. From heater blower switch
YES
Go to Step 2.
Electric load signal
circuit are in good
condition.
NO
"P/Bl" wire open or
short
Electric load signal
diodes faulty
Electric load signal
wire (electric load to
J/B) open or short
"P/B" wire open or
short