DI−84

DIAGNOSTICS − ENGINE
DI9GI−02

Diagnostic Connector (DLC3) Circuit

CIRCUIT DESCRIPTION
Terminals TC and CG are located in the DLC3.
The DLC3 is located under the finish lower panel. When terminals TC and CG are connected, DTC in normal
mode or test mode can be read from the check engine warning light in the combination meter.
Also, terminal SIL is located in the DLC3. This terminal is used by the M−OBD communication with hand−
held tester.

WIRING DIAGRAM

Combination Meter
Engine ECU

CHECK
12 ENGINE 10 1 7 12
From L−B L−B L−B W
C5 C5 IH3 IJ3 E23
GAUGE

J8 Junction E1
Connector DLC3
18 18
A W−B 4 13 GR−B GR−B TC
CG TC IJ5 E23
A
W−B
IC +B
16 19
R 16 7 R−W R−W SIL
BAT SIL IJ5 E23

1
2
DOME

R/B
1 2
No. 1 9 B B
1 TAC IJ3 E22 TAC

1
R−B(*1)
W−R(*2) From
Battery

*1 : Hong Kong
*2 : Except Hong Kong
A17433

15B−FTE ENGINE SUP (RM947E)

 DI−85
DIAGNOSTICS − ENGINE

INSPECTION PROCEDURE

1 Check check engine warning light condition.

PREPARATION:
(a) Turn the ignition switch ON.
(b) Using SST, connect terminals TC and CG of the DLC3.
SST 09843−18040
CHECK:
Check the check engine warning light condition.
OK:
Check engine warning light: Blinking
FI2547 HINT:
If this inspection OK and there is no hand−held tester, do not
need to do the following steps and this circuit is OK. Proceed
to next circuit inspection shown on problem symptom table
(See page DI−18).

OK Go to step 7.

NG

2 Check voltage between terminals TC and CG of DLC3.

ON
PREPARATION:
DLC3
Turn the ignition switch ON.
CG
CHECK:
Measure the voltage between terminals TC and CG of the
DLC3.
OK:
Voltage : 18 − 27 V
(+) (−) TC

A10152 OK Go to step 5.

NG

3 Check continuity between terminal CG of DLC3 and body ground.

NG Repair or replace harness or connector.

OK

15B−FTE ENGINE SUP (RM947E)

DI−86
DIAGNOSTICS − ENGINE

4 Check for open and short in harness and connector between terminal TC of
DLC3 and terminal TC of engine ECU (See page IN−20).

NG Repair or replace harness or connector.

OK

5 Check voltage between terminal W of engine ECU connector and body ground.

ON
PREPARATION:
W
(a) Disconnect the engine ECU from the body bracket (See
page ED−30).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal W of the engine ECU
connector and body ground.
(−) (+) OK:
A09727 Voltage: 18 − 27 V

OK Check and replace engine ECU

(See page IN−20).

NG

6 Check bulb of check engine warning light.

NG Replace bulb.

OK

Check for open in harness and connector be-

tween terminal W of engine ECU and com-
bination meter (See page IN−20).

15B−FTE ENGINE SUP (RM947E)

 DI−87
DIAGNOSTICS − ENGINE

7 Can you read DTC (including normal DTC) using hand−held tester?

YES Proceed to next circuit inspection shown on

problem symptoms table (See page DI−18).

NO

8 Check voltage between terminal BAT of DLC3 and body ground.

ON PREPARATION:
DLC3 BAT Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal BAT of the DLC3 and
body ground.
OK:
Voltage: 18 − 27 V
(−) (+)
A10153 OK Check for open and short in harness and con-
nector between terminal SIL of DLC3 and termi-
nal SIL of engine ECU (See page IN−20).

NG

Check for open and short in harness and connector between terminal BAT of DLC3 and DOME
(See page IN−20).

15B−FTE ENGINE SUP (RM947E)