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ENGINE (DIAGNOSTICS)
C: MALFUNCTION INDICATOR LIGHT DOES NOT COME ON
DIAGNOSIS:
The malfunction indicator light circuit is open or shorted.
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), malfunction indicator light does not come on.
WIRING DIAGRAM:
B134
B72
1
2
3
4 5 6
Step
1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B134) No. 17 (+) — Chassis ground (
2
CHECK POOR CONTACT.
Check for poor connection by shaking or pull-
ing ECM connector and harness.
Malfunction Indicator Light
B72
No.5
6
COMBINATION
METER
i10
i3
B38
ECM
B134
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 27
28
29
30 31
32
33 34
−
EN(H6DO)(diag)-46
IGNITION
SWITCH
SBF-6
3
i10
1
2
3 4
5
6 7 8 9 10
11
12
13
14
15
16
17
18
19
20
21
Check
Is the voltage less than 1 V?
):
Does the malfunction indicator
light illuminate?
BATTERY
MAIN SBF
B38
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
22
Yes
Go to step 4.
Go to step 2.
Repair the poor
Go to step 3.
contact in ECM
connector.
E
EN-03487
No
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