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6-2-152 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
Table B-2 Fuel Pump and Its Circuit Check
BLU/BLK
7
WHT/BLU
BLK/YEL
1
80A
60A 20A
E23
7
6
5
4
17
16
15
14
13
12
27
26
25
24
23
22
34
33
32
1. Relay box
2. Main relay
3. ECM
Troubleshooting
Step
1
Check fuel pump control system for operation. See
Fig.1.
Is fuel pump heard to operate for 3 sec. after igni-
tion switch ON?
2
Check fuel pump relay power supply.
1) Disconnect fuel pump relay from relay box with
ignition switch turned OFF.
2) Check for proper connection to fuel pump relay
at each terminals.
3) If OK, turn ON ignition switch, measure voltage
between "BLK/WHT" wire terminal and engine
ground.
Is voltage 10 – 14 V?
3
Check fuel pump relay power supply.
1) Turn ON ignition switch, measure voltage
between "BLK/RED" wire terminal of fuel pump
relay connector and engine ground.
Is voltage 10 –14 V?
BLK/WHT
BLK/WHT
4
6
BLK/RED
2
BLK/YEL
BLK/YEL
E22
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
4. Fuel pump relay
7. Ignition switch
5. Fuel pump
6. "IG COIL" fuse
Action
BLK/WHT
GRN
PNK
5
BLK
BLK/RED
BLK/RED
BLK/RED
BLU/BLK
E21
2
1
6
5
4
3
11
10
9
8
16
15
14
13
12
11
10
9
23
22
21
20
27
26
25
24
23
22
21
20
31
30
29
28
35
34
33
32
31
Fuel pump circuit is in
good condition.
Go to Step 3.
Go to Step 4.
3
E21-28
E23-14
E21-1
BLK
E23-2
BLK/YEL
E23-1
BLK/YEL
E21-6
E21-5
E23-15
2
1
8
7
19
18
17
30
29
28
Yes
Go to Step 2.
"BLK/WHT" wire open
or shorted to ground
circuit.
"BLK/RED" wire open
circuit.
No
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