Turn Signals: Description and Operation

System Description

TURN SIGNAL OPERATION
With the ignition switch in the ON or START position, power is supplied
- through 10 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 terminals 22 and 23.

Ground is supplied
- to BCM terminal 52
- through grounds M30 and M66,
- to combination meter terminals 1, 24 and 25
- through grounds M30 and M66.

LH Turn Signal Lamp
When turn signal switch is moved to left position, BCM receives input signal requesting left turn signals to flash. BCM then supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 6 and
- to rear combination lamp LH terminal 5.

Ground is supplied
- to front combination lamp LH terminal 8
- through grounds E17 and E43,
- to rear combination lamp LH terminal 4
- through ground B103.

The BCM also supplies input to combination meter terminals 4 and 5 through CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the left turn signal indicator lamp.

With power and input supplied, BCM controls flashing of LH turn signal lamps.

RH Turn Signal Lamp
When turn signal switch is moved to right position, BCM receives input signal requesting right turn signals to flash. BCM then supplies power
- through BCM terminal 46
- to front combination lamp RH terminal 6 and
- to rear combination lamp RH terminal 5.

Ground is supplied
- to front combination lamp RH terminal 8
- through grounds E17 and E43,
- to rear combination lamp RH terminal 4
- through ground B103.

The BCM also supplies input to combination meter terminals 4 and 5 through CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the right turn signal indicator lamp.

With power and input supplied, BCM controls flashing of RH turn signal lamps.

HAZARD LAMP OPERATION
Power is supplied at all times
- through 50 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse [No. 18, 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 21.

Ground is supplied
- to hazard switch terminal 1
- to combination meter terminals 1, 24 and 25, and
- to BCM terminal 52
- through grounds M30 and M66,

When hazard switch is depressed, ground is supplied
- to BCM terminal 29
- through hazard switch terminal 2.

BCM then supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 6 and
- to rear combination lamp LH terminal 5,
- through BCM terminal 46
- to front combination lamp RH terminal 6 and
- to rear combination lamp RH terminal 5.

Ground is supplied
- to front combination lamp RH and LH terminals 8
- through grounds E17 and E43,
- to rear combination lamp RH and LH terminals 4
- through ground B103.

The BCM also supplies input to combination meter terminals 4 and 5 through CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.

With power and input supplied, BCM controls flashing of hazard warning lamps.

REMOTE KEYLESS ENTRY SYSTEM OPERATION
Power is supplied at all times
- through 50 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 21.

Ground is supplied
- to BCM terminal 52 and
- to combination meter terminals 1, 24 and 25
- through grounds M30 and M66.

When the remote keyless entry system is triggered by input from key fob, BCM supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 6 and
- to rear combination lamp LH terminal 5,
- through BCM terminal 46
- to front combination lamp RH terminal 6 and
- to rear combination lamp RH terminal 5.

Ground is supplied
- to front combination lamp RH and LH terminals 8
- through grounds E17 and E43,
- to rear combination lamp RH and LH terminals 4
- through ground B103.

The BCM also supplies input to combination meter terminals 4 and 5 through CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.

With power and ground supplied, BCM controls flashing of hazard warning lamps when key fob is used to activate remote keyless entry system.

COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION". Description and Operation

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 LAN-26, "CAN Communication Unit". Description and Operation