Turn Signals: Description and Operation

System Description

TURN SIGNAL OPERATION
When the ignition switch is in the ON or START position, power is supplied
- through 10 A fuse [No. 1, located in the fuse block (J/B)]
- to BCM (body control module) terminal 35, and
- through 10 A fuse [No. 14, located in the fuse block (J/B)]
- to combination meter terminal 23.

Ground is supplied
- to BCM (body control module) terminal 8
- through grounds E17,E43, and F152, and
- to combination meter terminals 10, 11 and 12
- through grounds M30 and M66.

LH Turn
When the turn signal switch (combination switch) is moved to the LH position, the BCM (body control module) receives left turn signal by combination switch reading function (Refer to "Combination Switch Reading Function"). Power is supplied
- through BCM (body control module) terminal 22
- to front combination lamp LH terminal 2(*1)
- to front combination lamp LH terminal 1(*2)
- to rear combination lamp LH terminal 2.

Ground is supplied to the front combination lamp LH terminal 1 through grounds E17, E43 and F152(*1).

Ground is supplied to the front combination lamp LH terminal 4 through grounds E17, E43 and F152(*2).

Ground is supplied to the rear combination lamp LH terminal 4 through grounds T14, B6, B5 and D105.

The BCM also supplies ground to unified meter and A/C amp. terminals 1and 11 across the CAN communication lines. This input signal is processed by the unified meter control unit in the combination meter through the unified meter and A/C amp., which in turn supplies ground to the left turn signal indicator lamp.

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

NOTE: *1: Xenon headlamp, *2: halogen headlamp.

RH Turn
When the turn signal switch (combination switch) is moved to the RH position, the BCM (body control module) receives right turn signal by combination switch reading function (Refer to "Combination Switch Reading Function") power is supplied
- through BCM (body control module) terminal 21
- to front combination lamp RH terminal 2(*1)
- to front combination lamp RH terminal 1(*2)
- to rear combination lamp RH terminal 2.

Ground is supplied to the combination lamp RH terminal 1 through grounds E17, E43 and F152(*1).

Ground is supplied to the front combination lamp RH terminal 4 through grounds E17, E43 and F152(*2).

Ground is supplied to the rear combination lamp RH terminal 4 through grounds T14, B6, B5 and D105.

The BCM also supplies ground to unified meter and A/C amp. terminals 1 and 11 across the CAN communication lines. This input is processed by the unified meter control unit in the combination meter through the unified
meter and A/C amp., which in turn supplies ground to the right turn signal indicator lamp.

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

NOTE: *1: Xenon headlamp, *2: Halogen headlamp.

REMOTE KEYLESS ENTRY SYSTEM OPERATION
Power is supplied at all times
- to BCM (body control module) terminal 7
- through 40 A fusible link [letter F, located in the fuse and fusible link box], and
- to combination meter terminal 24
- through 10 A fuse [No. 19, located in the fuse block (J/B)].

Ground is supplied
- to BCM terminal 8,
- through grounds E17, E43 and F152
- to combination meter terminals 10, 11 and 12
- through grounds M30 and M66.

When the remote keyless entry system is triggered by input signal from the key fob, the BCM supplies power
- through BCM terminal 22
- to front combination lamp LH terminal 2(*1)
- to front combination lamp LH terminal 1(*2)
- to rear combination lamp LH terminal 2
- through BCM terminal 21
- to front combination lamp RH terminal 2(*1)
- to front combination lamp RH terminal 1(*2)
- to rear combination lamp RH terminal 2.

Ground is supplied
- to the front combination lamp LH terminal 1 through grounds E17, E43 and F152(*1)
- to the front combination lamp LH terminal 4 through grounds E17, E43 and F152(*2)
- to the front combination lamp RH terminal 1 through grounds E17, E43 and F152(*1)
- to the front combination lamp RH terminal 4 through grounds E17, E43 and F152(*2)
- to the rear combination lamp LH terminal 4 through grounds T14, B6, B5 and D105
- to the rear combination lamp RH terminal 4 through grounds T14, B6, B5 and D105.

The BCM also supplies input signal to unified meter and A/C amp terminals 1 and 11 across the CAN communication lines. This input is processed by the unified meter control unit in the combination meter through the unified meter and A/C amp., which in turn supplies ground to the left and right turn signal indicator lamps.

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

NOTE: *1: Xenon headlamp, *2: Halogen headlamp

COMBINATION SWITCH READING FUNCTION
Refer to "Combination Switch Reading Function". Testing and Inspection

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.