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Hello, would anyone happen to have a list of the definitions of the codes Toyota uses on their wiring diagrams? For example, I think VC refers to 5 volt reference. I think E2 refers to ground. Not completely sure about that. Would love to have a complete list so I know what I'm looking at when I'm reading those codes.
I know I have a decent list of acronyms they use. I'll look for it and upload here. You are correct VC is 5v ref. "Voltage Constant" E is "Earth"... ground. I thought I read somewhere E1 was sensor ground and E2 was computer ground (I may have that mixed up). Anyway, I'll get back to you
AC alternating current
ACV air control valve
A/C SW a/c switch signal
ACIS acoustic control intake system
AVC a/c idle up valve
AF or AFS air fuel ratio sensor
AI air injection
ALT alternator
B+ battery voltage from main EFI relay
BATT battery power
BARO barometric pressure
CAN controller area network
CANH can high
CANL can low
CCV canister close valve
CG chassis ground
CMP camshaft position sensor
CKP crankshaft position sensor
COP coil on plug
CPU central processing unit
CTS coolant temperature sensor
CV control valve/check valve
D4 direct injection system
D4S D4 with port injection
DI fuel speed control
DI distributor ignition
DIS direct injection system
DLC data link connector
E1, E2, etc ground
ECT engine coolant temp
EGR exhaust gas recirculation
EI electronic ignition
EIS engine immobilizer system
ELS electric load sensor signal
ESA electronic spark advance
ETC throttle control ecu
ETCS electronic throttle control system
EVP EGR valve position sensor
EVAP evap vsv/purge solenoid
EVRV electronic vacuum regulating valve
FC fuel pump control
FP fuel pump
FPU fuel pressure up
FS fail safe relay
FT fuel trim
G- camshaft position ground
G+, G1-2 camshaft position
GND ground
HT1 o2 sensor heater control
HTAF1 a/f sensor heater
IAC idle air control
IC integrated circuit
IDL tps idle circuit
IGC ignition control primary
IGD coil ID signal
IGF ignition feedback
IGSW ignition switch
IGT ignition timing
IMI immobiliser input
IMO immobiliser output
ISCC iac motor close circuit
ISCO iac motor open circuit
KNK knock sensor
LAN local area network
LIN local interconnected network
M+, M- motor control
MAF mass air flow
MAP manifold absolute pressure
MPX multiplex communication
MREL main relay
NE+ crankshaft position +
NE- crankshaft position -
OCV oil control valve
PCM powertrain control module
PRG evap vsv purge solenoid
PSP or PSSW p/s pressure switch
PTNK fuel tank vapor pressure circuit
SIL serial information line
SP speed signal
STA start signal
STJ cold start injector
STP stop light
TACH tachometer
TC data link connector
TCV timing control valve
THA thermal air
THG egr temp signal
THW thermal water, coolant temp
TPC vapor pressure sensor vsv
TSW water temperature switch
VB battery voltage
VC voltage constant 5volt ref
VCV vacuum control valve
VG mass air flow signal
VPA accelerator pedal position
VS mass air flow signal
VSS vehicle speed signal
VSV vacuum switching valve
VTA throttle position signal
VVT variable valve timing[/color]
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