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6-182 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Table B-6 Electric Load Signal Circuit Check
5
1
6
C64
7
6
5
4
17
16
15
14
13
12
27
26
25
24
23
22
34
33
32
1. Blower fan motor
2. Blower fan switch
TROUBLESHOOTING
Step
1
Do you have Suzuki Scan Tool?
2
Check electric load signal circuit.
1) Connect Suzuki Scan Tool to DLC with ignition
switch OFF.
2) Start engine and select "DATA LIST" mode on
scan tool.
3) Check electric load signal under following each
condition. See Table 1.
Is check result satisfactory?
3
Check electric load signal circuit.
1) Turn ignition switch ON.
2) Check voltage at each terminals "G91-13" and
"G91-33" of ECM connector connected, under
above each condition. See Table 1.
Is each voltage as specified?
Table 1 for Step 2 and 3
Ignition switch ON, Small
light and heater blower fan all
turned
2
3
C63
3
2
1
7
6
5
4
3
11
10
9
8
19
18
17
16
15
14
13
12
21
20
19
18
27
26
25
24
31
30
29
28
35
34
33
32
3. Position lamp
5. To "HEATER" fuse
4. ECM
6. To "TAIL" fuse
Action
SUZUKI
SCAN TOOL
OFF
ON
YEL
RED/YEL
G91
2
1
6
5
4
3
11
10
9
8
16
15
14
13
12
11
10
23
22
21
20
27
26
25
24
23
22
21
31
30
29
28
35
34
33
32
31
Go to Step 2.
Electric load signal circuit
is in good condition.
Electric load signal circuit
is in good condition.
Scan tool or voltmeter
VOLTAGE
AT G91-33
OFF
0 V
ON
10 – 14 V
4
G91-13
G91-33
2
1
7
9
8
20
19
18
17
30
29
28
Yes
Go to Step 3.
"YEL" and/or "RED/
YEL" circuit open or
short, electric load
diodes malfunction or
each electric load cir-
cuit malfunction.
"YEL" and/or "RED/
YEL" circuit open or
short, electric load
diodes malfunction or
each electric load cir-
cuit malfunction.
VOLTAGE
AT G91-13
10 – 14 V
0 V
No
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