Turn Signals: Description and Operation

Turn Signal And Hazard Warning Lamps Schematic:

Turn Signal And Hazard Warning Lamps Schematic

Turn Signal And Hazard Warning Lamps

System Description

OUTLINE
Power is supplied at all times
- through 50 A fusible link (letter M, located in fuse and fusible link block)
- to BCM terminal 55,
- through 15 A fuse [No. 22, located in fuse block (J/B)]
- to BCM terminal 42,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 8.
- through 10 A fuse [No. 20, located in fuse block (J/B)]
- to rear combination lamp control unit terminal 1.

When ignition switch is in ON or START position, power is supplied
- through 15 A fuse [No. 1, located in fuse block (J/B)]
- to BCM (body control module) terminal 38,
- through 10 A fuse [No. 14, located in fuse block (J/B)]
- to combination meter terminal 7.

When ignition switch is in ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in fuse block (J/B)]
- to BCM terminal 11.

Ground is supplied
- to rear combination lamp control unit terminal 7
- through grounds E21, E50 and E51,
- to BCM terminals 49 and 52, and
- to combination meter terminals 5, 6 and 15
- through grounds M35, M45 and M85.

TURN SIGNAL OPERATION

LH Turn Signal Lamp
When the turn signal switch is moved to the left position, BCM output turn signal from BCM terminal 45, interpreting it as turn signal is ON.
Connected from BCM terminal 45 to front combination lamp LH terminal 4.

Turn signal lamp turns ON
- through front combination lamp LH terminal 8
- to grounds E21, E50 and E51.

Connected from BCM terminal 45 to rear combination lamp control unit terminal 4.
Rear turn signal (LED) turns ON
- through rear combination lamp control unit terminal 11
- to rear combination lamp LH terminal 3,
- through rear combination lamp LH terminal 4
- to rear combination lamp control unit terminal 10.

BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combination meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN communication lines for speeding up turn signal blinking.

RH Turn Signal Lamp
When the turn signal switch is moved to right position, BCM output turn signal from BCM terminal 46, interpreting it as turn signal is ON.
Connected from BCM terminal 46 to front combination lamp RH terminal 4.
Turn signal lamp turns ON
- through front combination lamp RH terminal 8
- to grounds E21, E50 and E51.

Connected form BCM terminal 46 to rear combination lamp control unit terminal 5.
Rear turn signal (LED) turns ON
- through rear combination lamp control unit terminal 9
- to rear combination lamp RH terminal 3,
- through rear combination lamp RH terminal 4
- to rear combination lamp control unit terminal 8.

BCM sends signal to the unified meter and A/C amp. through CAN communication, and turns ON turn signal indicator lamp with combination meter.
When rear turn signal lamp (LED) does not turn ON, rear combination lamp control unit sends signal to combination meter. And then unified meter and A/C amp. ends turn LED burnout status signal to BCM through CAN communication lines for speeding up turn signal blinking.

REMOTE CONTROL ENTRY SYSTEM OPERATION
When the remote control entry system is triggered by input from key fob, BCM output turn signal from BCM terminals 45 and 46, interpreting it as turn signal is ON.

Connected from BCM terminals 45 and 46 to front combination lamp RH and LH terminals 4.
Turn signal lamp turns ON
- through front combination lamp RH and LH terminals 8
- to grounds E21, E50 and E51.

Connected form BCM terminals 45 and 46 to rear combination lamp control unit terminals 4 and 5.
Rear turn signal (LED) turns ON
- through rear combination lamp control unit terminal 11
- to rear combination lamp LH terminal 3,
- through rear combination lamp LH terminal 4
- to rear combination lamp control unit terminal 10,
- through rear combination lamp control unit terminal 9
- to rear combination lamp RH terminal 3,
- through rear combination lamp RH terminal 4
- to rear combination lamp control unit terminal 8.

BCM sends signal to the unified meter and A/C amp. through the CAN communication, and turns ON turn signal indicator lamp with combination meter.
With power and input supplied, BCM controls the flashing of hazard warning lamps when key fob is used to activate remote control entry system.

COMBINATION SWITCH READING FUNCTION
Refer to "COMBINATION SWITCH READING FUNCTION" in Body Control System.

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit
Refer to Information Bus. CAN System Specification Chart