DRIVER CONTROLS › EXTERIOR LIGHTING SYSTEM › COMPONENT DIAGNOSIS

TURN SIGNAL LAMP CIRCUIT

XENON TYPE

Description
Component Function Check
Diagnosis Procedure

Description

BCM performs the high flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is open.
NOTE：
Turn signal lamp blinks at normal speed when using the hazard warning lamp.

Component Function Check

1.CHECK TURN SIGNAL LAMP

CONSULT-III ACTIVE TEST

Select "FLASHER" of BCM (FLASHER) active test item.
With operating the test items, check that the turn signal lamp blinks.
LH
: Turn signal lamp LH blinking
RH
: Turn signal lamp RH blinking
Off
: The turn signal lamp OFF

Does the turn signal lamp blink?

YES>>Turn signal lamp circuit is normal.

NO>>Refer to Diagnosis Procedure.

Diagnosis Procedure

1.CHECK TURN SIGNAL LAMP BULB

Check the applicable lamp bulb.

Is the bulb normal?

YES>>GO TO 2.

NO>>Replace the bulb.

2.CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE

CONSULT-III ACTIVE TEST

Turn the ignition switch OFF.
Disconnect the front combination lamp connector or the rear combination lamp connector.
Turn the ignition switch ON.
Select "FLASHER" of BCM (FLASHER) active test item.
With operating the test items, check the voltage between the BCM harness connector and the ground.
Front
Terminals
Test item
Voltage (Approx.)
(+)
(−)
BCM
Ground
FLASHER
Connector
Terminal
RH
M119
17
RH

Off
0 V
LH
18
LH

Off
0 V

Rear
Terminals
Test item
Voltage (Approx.)
(+)
(−)
BCM
Ground
FLASHER
Connector
Terminal
RH
M120
20
RH

Off
0 V
LH
25
LH

Off
0 V

Is the measurement value normal?

YES>>GO TO 3.

NO>>Replace the BCM.

3.CHECK TURN SIGNAL LAMP OPEN CIRCUIT

Turn the ignition switch OFF.
Disconnect the BCM connector.
Check continuity between the BCM harness connector and the front combination lamp or the rear combination lamp harness connector.
Front combination lamp
BCM
Front combination lamp
Continuity
Connector
Terminal
Connector
Terminal
RH
M119
17
E58
6
Existed
LH
18
E28
6

Rear combination lamp
BCM
Rear combination lamp
Continuity
Connector
Terminal
Connector
Terminal
RH
M120
20
B240
4
Existed
LH
25
B57
4

Does continuity exist?

YES>>GO TO 4.

NO>>Repair the harnesses or connectors.

4.CHECK TURN SIGNAL LAMP SHORT CIRCUIT

Check continuity between the BCM harness connector and the ground.

Front

BCM			Ground	Continuity
Connector		Terminal
RH	M119	17		Not existed
LH		18

Rear

BCM			Ground	Continuity
Connector		Terminal
RH	M120	20		Not existed
LH		25

Does continuity exist?

YES>>Repair the harnesses or connectors.

NO>>GO TO 5.

5.CHECK TURN SIGNAL LAMP GROUND OPEN CIRCUIT

Check continuity between the front combination lamp or the rear combination lamp and the ground.

Front combination lamp

Front combination lamp			Ground	Continuity
Connector		Terminal
RH	E58	2		Existed
LH	E28	2

Rear combination lamp

Rear combination lamp			Ground	Continuity
Connector		Terminal
RH	B240	3		Existed
LH	B57	3

Does continuity exist?

YES>>Replace the front combination lamp or the rear combination lamp.

NO>>Repair the harnesses or connectors.

LH	: Turn signal lamp LH blinking
RH	: Turn signal lamp RH blinking
Off	: The turn signal lamp OFF

Terminals				Test item	Voltage (Approx.)
(+)			(−)
BCM			Ground	FLASHER
Connector		Terminal
RH	M119	17		RH
				Off	0 V
LH		18		LH
				Off	0 V