Engine General Information and Diagnosis: 1A-38
Malfunction Indicator Lamp Remains ON after Engine Starts
S3RH0B1104012
Wiring Diagram
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
1
G04-10
G04-23
12V
5V
ECM
2
3
G04-6
+B
G04-5
B
D
A
C
BLK/WHT
BRN/WHT
BLK/RED
BLK/RED
C41 (31P)
G04 (24P)
G03 (17P)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
28 27
29
30
31
5
6
1
2
3
4
5
6
7
11
12
9
10
11
13 12
14
15
16
16
17
1
2
7
8
13
14
3
4
9
10
15
17
18
8
19
20
21
22
23
24
BLK
DN
TS
GND
MON
PPL/WHT
C41-27
G04-15
PNK/GRN
G03-17
7
4
G03-7
PPL/YEL
5
6
9
IG1
PNK/BLK
BLK/RED
BLK/YEL
8
7
GRN
GRN
I3RH0A110012-01
1. “BATT” fuse
4. To battery
7. To ignition switch
2. Main fuse box
5. Diagnosis connector
8. Main relay
3. “IG” fuse
6. MIL
9. “METER” fuse
Step
Action
Yes
No
1
DTC check
1) Check DTC referring to “DTC Check”.
Is there any DTC(s)?
Go to Step 2 of “Engine
and Emission Control
System Check”.
Go to Step 2.
2
DTC check
1) Start engine and recheck DTC while engine running.
Is there any DTC(s)?
Go to Step 2 of “Engine
and Emission Control
System Check”.
Go to Step 3.
3
MIL circuit check
1) Turn ignition switch to OFF position.
2) Remove combination meter referring to “Combination
Meter Removal and Installation in Section 9C in related
manual”.
3) Disconnect connectors from ECM.
4) Measure resistance between “PPL/YEL” wire terminal of
combination meter connector and body ground.
Is resistance infinity?
Go to Step 4.
“PPL/YEL” wire circuit
shorted to ground.
4
MIL circuit check
1) Connect connectors to combination meter.
Does MIL turn ON at ignition switch turned ON?
Replace combination
meter.
Substitute a known-
good ECM and recheck.
Содержание Liana RH418
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