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DI-940
DIAGNOSTICS - ENGINE (2UZ-FE)
DIDSJ-01

MIL Circuit

CIRCUIT DESCRIPTION
If the ECM detects a trouble, the MIL lights up. At this time, the ECM records a DTC in the memory.

WIRING DIAGRAM

ECM

R 30
7 V-G
E4 W
AM2

2
I18
Ignition
Engine Switch
2
IG2

Room 7 C8
AM2 R/B
1 6
B-R

2 6 1D Malfunction
Indicator
Lamp
GAUGE

4 1G 15 C10 Combination
Battery Meter

R-L

A21044
DI-941
DIAGNOSTICS - ENGINE (2UZ-FE)

INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below .
MIL remains on Start inspection from step 1
MIL does not light up Start inspection from step 3

1 Clear DTC.

PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Read the DTC (See page DI-462).
(d) Clear DTCs (see page DI-462).
CHECK:
(a) Check that MIL does not light up.
OK:
Standard: MIL does not light up

OK Repair circuit indicated by output code
(See page DI-477).

2 Check Harness and connector (Check for short in wire harness).

PREPARATION:
E4 (a) Disconnect the E4 ECM connector.
(b) Turn the ignition switch ON.
CHECK:
(a) Check that MIL does not light up.
OK:
Standard: MIL does not light up

W B17418

OK Replace ECM (See page SF-82).

Check and repair harness and connector be-
tween combination meter and ECM.
DI-942
DIAGNOSTICS - ENGINE (2UZ-FE)

3 Check that MIL lights up.

CHECK:
Check that MIL lights up when turning the ignition switch ON.
OK:
Standard: MIL lights up

OK System OK.

4 Inspect combination meter assy (MIL circuit).

See the combination meter troubleshooting on page BE-86.

NG Repair or replace bulb or combination meter as-
sembly.

Check and repair harness and connector be-
tween combination meter and ECM.

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