Understanding the Circuit Diagrams

Understanding the Circuit Diagrams







Connectors, Ground and Splices
Harnesses for the vehicle originate from a variety of different sources and therefore the connector nomenclature is inconsistent.

Wire Length
Wire length (where stated) is in millimeters and appear directly below the color code for each wire. Wire length values are displayed for LHD vehicles only, values for RHD vehicles may vary.

Twisted Wires
The 'figure-of-eight' symbol indicates that wires are twisted together.

By-pass Wires
Vehicles are customized to suit market or customer selected options. To reduce the number of circuits drawn, by-pass wires are shown. By-pass wires are identified by large, upper case letters designed to correspond with the alternative connection arrangement.







Connector Designation
Certain connectors have been drawn for harness manufacturing purposes only. In Example 1, the left-hand connector is always used, the connector drawn to the right-hand side of the dotted line is a dummy connector which should be ignored.







Example 2 depicts that some pairs of connectors have also been drawn for harness manufacturing purposes, these connectors do not appear in the vehicle and therefore should be ignored.







Control Module Pins

B+ Battery voltage
C- CAN negative
C+ CAN positive
D Data
GND Ground
GREF Sensor / signal ground **
IP Input signal
LIN Local interconnect network
MOST_RX MOST receive
MOST_TX MOST transmit
NEG Negative
OP Output signal
P Power ground
POS Positive
PWR Power
SW Switch
VBATT Battery voltage
VREF Sensor / signal supply V *

*May also indicate Reference Voltage.
**May also indicate Reference Ground or Logic Ground.

Wire Codes

CODE COLOR

BK or B BLACK
BN or N BROWN
BU or U BLUE
GN or G GREEN
GY or S GREY
OG or O ORANGE
OPT FIBER OPTIC
PK or K PINK
RD or R RED
SCR SCREEN BRAID
VT or P PURPLE
WH or W WHITE
YE or Y YELLOW

Option Code
A code identifying an optional wiring arrangement, for example BY1AD, may be allocated to certain wires.

The asterisk (*) represents and ; the colon (:) represents or ; for example:
DR_B*BY1AD, represents: left-hand drive AND heated & cooled seats
IBYAD*IESAB:IBYAC*IESAB, represents: satellite digital audio AND television OR digital audio AND television.







Option Code Table

Cct Vehicle Option or Feature

2W_LUM 2way lumbar
A2CAA without secondary air injection
A2CAB secondary air injection
A2CAC secondary air injection map sensor
A2EAA without USB
A2EAB USB
A3RAA without deployable bonnet
A3RAB deployable bonnet
ADJ_BOL adjustable bolster
B3MAB heated front screen
BDAAD power rear sunblind
BPW brake pad wear
BSBAF electrochromic interior mirror
BSHDF fold back mirrors
BY1AA without heated seats
BY1AC heated seats
BY1AD heated & cooled seats
BYPAM 10way drivers seat movement
BYPAN 16way drivers seat movement
BYQAH 12way passengers seat movement
BYRAA without programmable drivers seat
BYRAB programmable drivers seat
CBAAB power door locks
CBAAD power dead locks
CBGAG keyless entry
CBGAJ without keyless entry
CFKAB headlamp washer
CHAAL power tilt/slide sunroof
CP5AB beltminder
CP5AC occupancy sensing
D19AA without TPMS
D19AB TPMS
DR_B LHD
DR_D RHD
DWMAA without ADRC
DWMAB ADRC
DWMAC Continuously variable damping
EGJAE without electronic differential
EGJAL electronic differential
EM_N ULEV 2 requirements
EN_A5 2.7L diesel engine
EN_AJ 4.2L PV8NA engine
EN_AK 4.2L PV8SC engine
EN_RX 5.0L PV8NA engine
EN_RY 5.0L PV8SC engine
EN_SU 3.0 DV6 engine
EN_WD 3.0 PV6 engine
G1DAA without smog sensor
G1DAB smog sensor
GRBAA without steering column lock
GRBAB steering column lock
GTBAA without heated steering wheel
GTBAB heated steering wheel
GTDAB speed control
GTDAD adaptive stop/go speed control
HKCAA without navigation
HKCAB navigation
HKCAD traffic master
HKCAF VICS
HLLAA without blindspot monitoring
HLLAC blindspot monitoring
HNHAB battery backed security siren
HNHAC passive sounder
HNLAB front parking aid
IBUAB bluetooth phone
IBYAB analog audio
IBYAC digital audio
IBYAD satellite digital audio
IBYAH IBOC
IDAAA standard ice
IDAAB premium ice
IDAAR hi line ice
IESAA without television
IESAB television
IF9AB voice activated controls
J3GAA without electronic road pricing
J3GAB electronic road pricing
J3KAA without park aid camera
J3KAB park aid camera
JBBAB halogen headlamps
JBBAC hid headlamps
JEAAC automatic headlamp leveling
NO_EN_AK without 4.2L SC engine
NO_HD without IBOC
NO_OCS without occupant classification system
NO_SAIMAP without secondary air injection map sensor
NO_TMC without TMC

Component Depictions







1. Complete Components and Control Modules
2. Incomplete Components
3. Components with Internal Electronic Components