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6-58 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Table A-2 Malfunction Indicator Lamp Circuit Check-lamp Remains "ON" after
Engine Starts
WIRING DIAGRAM
2
WHT/BLU
BLK/YEL
1
80A
60A 15A
C64
7
6
5
4
17
16
15
14
13
12
27
26
25
24
23
22
34
33
32
1. Relay/fuse box
2. Ignition switch
3. Main relay
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then,
ECM being supplied with the main power, turns ON the malfunction indicator lamp (MIL). When the engine
starts to run and no malfunction is detected in the system, MIL goes OFF but if a malfunction was or is detected,
MIL remains ON even when the engine is running.
TROUBLESHOOTING
Step
1
DTC Check
1) Check DTC referring to "Diagnostic Trouble Code
(DTC) Check" in this section.
Is there any DTC(s)?
2
DTC Check
1) Start engine and recheck DTC while engine running.
Is there any DTC(s)?
6
8
BLK/YEL
BLU/ORN
BLK/YEL
5
3
BLK/YEL
D
C
B
A
BLK/YEL
C63
3
2
1
7
6
5
4
3
11
10
9
8
19
18
17
16
15
14
13
21
20
19
18
27
26
25
24
31
30
29
28
35
34
33
32
4. Malfunction indicator lamp in combination meter
5. "IG" fuse
6. "METER" fuse
Action
4
PPL/WHT
BLK/WHT
BRN/WHT
BLK/RED
BLK/RED
BLK/RED
G91
2
1
6
5
4
3
12
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
7. ECM
8. Circuit fuse box
7
G91-1
G91-28
C63-1
C64-2
C64-1
C64-15
5V
12V
G91-6
G91-5
2
1
7
9
8
20
19
18
17
30
29
28
Yes
Go to Step 2 of
Go to Step 2.
"Engine and Emis-
sion Control System
Check" in this sec-
tion.
Go to Step 2 of
Go to Step 3.
"Engine and Emis-
sion Control System
Check" in this
section.
BLK/ORN
BLK
BLK/ORN
No
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