Before you begin diagnosing a failure of any circuit, check the condition of the fuses and circuit breakers that protect it (if the latter are provided). Make sure the battery is fully charged and check the quality of the contact connections of the wires coming from its terminals (see chapter Vehicle settings and routine maintenance).
When searching for a failure of a specific circuit, first of all also check the quality of the contact connections of its electrical wiring. When disconnecting electrical connectors, try to pull only by their housings, and in no case by the wiring harness.
Electrical wiring insulation color codes*
Characteristic | Meaning |
| BLK | Black |
| BLU | Blue |
| BRN | Brown |
| GRY | Grey |
| GRN | Green |
| LT | Light (shade) |
| NCA | Not defined |
| ORG | Orange |
| PNK | Pink |
| PPL | Purple |
| RED | Red |
| TAN | Golden |
| VIO | Violet |
| WHT | White |
| YEL | Yellow |
* OR = OR. For example: YEL OR ORG = Yellow or Orange | |
List of abbreviations used in diagrams
Characteristic | Meaning |
AT | Automatic transmission |
D/V | Sensor switch |
K/V | Air conditioner |
K/L | Control lamp |
PR-L | Fuse |
EM | Electromagnetic |
DLC | Diagnostic connector |
| DRL | Daytime running lights |
| ECM | Electronic control module |
| ECU | Electronic control unit |
| EGR | exhaust gas recirculation (system) |
| EVAP | (System) for capturing fuel vapors |
| IAT | (Sensor) intake air temperature |
| IGN | Ignition |
| IND | Indicator/Control Lamp |
| J/B | Junction block |
| J/C | Connector |
| R/B | Mounting block |
| VSS | Vehicle speed sensor |
| VSV | Vacuum switch valve |
Automatic transmission
Characteristic | Meaning |
| FLOOR A/T | AT with floor-mounted selector lever |
| COLUMN A/T | AT with a selector lever located on the steering column |
| NORM | Normal operating mode of AT |
| PWR | Sports mode of AT operation |
Fuses
Characteristic | Meaning |
| A/C | Air conditioner |
| ALT | Generator |
| AM1 | |
| AM2 | |
| CIG, CIGAR | Cigarette lighter |
| DOME | Interior lighting |
| DRL | Daytime running lights |
| ECU | Electronic control module |
| ECU-B | |
| ECU-IG | |
| EFI | Fuel injection system |
| ENGINE | Engine |
| GAUGE | Measuring instruments |
| HAZ-HORN | Av. alarm – Klaxon |
| HEATER | Heater |
| HORN | Horn |
| LEFT HI HEAD | Left headlight high beam |
| LEFT LO HEAD | Low beam left headlight |
| LH HEAD | Left headlight |
| OBD | On-board self-diagnostic system |
| PANEL | Instrument panel |
| POWER | Nutrition |
| RADIO | Radio |
| RH HEAD | Right headlight |
| RIGHT HI HEAD | Right headlight high beam |
| RIGHT LO HEAD | Right headlight low beam |
| STA, STARTER | Starter |
| STOP | Brake lights |
| TAIL | Rear lights |
| TURN | Direction indicators |
| WIPER | Windscreen wipers |
Ignition switch positions
Characteristic | Meaning |
OFF | Off |
LOCK | Steering column lock |
ACC | Parking |
ON | Included |
START | Launch |
Positions of the cruise control switch
Characteristic | Meaning |
RESUME/ACCEL | Return/Acceleration |
SET/COAST | Installation/Coasting |
CANCEL | Reset |
Positions of the heater fan speed selector switch
Characteristic | Meaning |
OFF | Off |
LO | Low speed mode |
M1 | Intermediate mode 1 |
M2 | Intermediate mode 2 |
HI | High speed mode |
Some of the terminals of the electronic control units
Characteristic | Meaning |
| AC | Air conditioner |
| BATT | Battery |
| +B | Positive battery terminal |
EGR | Exhaust gas recirculation system |
GND | Weight |
HT | Heating element (oxygen sensor) |
KNK | Knock sensor |
OIL | Oil |
| OX | Oxygen sensor |
| SL | Solenoid valve |
| SP | Speed sensor |
| STA | Starter |
TAC | Tachometer |