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Jetronic/K-JetronicJetronic, or "CIS-E", which means "Continuous Injection System), due to the mechanical fuel distributor, is the basic system used in lower-end models early on. The "K" in K-Jetronic indicates continuous injection, and "lambda" indicates the inclusion of a lambda probe, or oxygen sensor on certain models. It was only used on base model Golfs in 1985-1987, and some Jettas in the same years. The oxygen sensor computer is wired differently in both models. Operating theory is very basic. The engine sucks in air, which raises the fuel distributor vane meter, thus metering fuel (continuously) to the mechanical injectors. Models with an oxygen sensor have the air/fuel mixture controlled by a frequency vale that lets in extra fuel to lean out the mixture when needed. There is no knock control. |
1985-1987 Golf: | ||
Oxygen Controller (if equipped): | ||
| Pin | Function | Color |
| 1 | - | - |
| 2 | Oxygen Sensor Shield | Braided Wire |
| 3 | - | - |
| 4 | Oxygen Sensor | Green |
| 5 | Ground | Brown |
| 6 | - | - |
| 7 | - | - |
| 8 | Power from Lambda Relay | Green/Yellow |
| 9 | - | - |
| 10 | - | - |
| 11 | - | - |
| 12 | Oxygen Thermoswitch | Brown/Red |
| 13 | - | - |
| 14 | - | - |
| 15 | Frequency Valve | Gray/Blue |
| 16 | Ground | Brown |
| 17 | Duty Cycle Test Connector | Blue/White |
| 18 | - | - |
| 19 | - | - |
| 20 | - | - |
| 21 | - | - |
| 22 | - | - |
| 23 | - | - |
| 24 | - | - |
| 25 | - | - |
| 26 | To Pin 32 or 33 | Brown/Green |
| 27 | - | - |
| 28 | - | - |
| 29 | - | - |
| 30 | - | - |
| 31 | - | - |
| 32 | From Pin 23 (California emissions) | Brown/Green |
| 33 | From Pin 23 (49-state emissions) | Brown/Green |
Ignition Controller: | ||
| Pin | Function | Color |
| 1 | Coil pin 1 | Green/Blue |
| 2 | Ground | Brown |
| 3 | Distributor Pin 1 (negative) | Brown/White |
| 4 | Start/Run Power | Yellow |
| 5 | Distributor Pin 3 (positive) | Brown/Black |
| 6 | Distributor Pin 2 (hall sender) | Green |
| 7 | - | - |
1985-1987 Jetta: | ||
Oxygen Controller (if equipped): | ||
| Pin | Function | Color |
| 1 | Oxygen Sensor Frequency Valve | Blue/White |
| 2 | Ground | Brown/White |
| 3 | - | - |
| 4 | To Pin 23 | White |
| 5 | - | - |
| 6 | - | - |
| 7 | - | - |
| 8 | - | - |
| 9 | Oxygen Sensor shield | White |
| 10 | Ground | Brown/Blue |
| 11 | Oxygen Sensor | Green |
| 12 | - | - |
| 13 | - | - |
| 14 | - | - |
| 15 | - | - |
| 16 | - | - |
| 17 | Oxygen Thermoswitch | Brown/Red |
| 18 | Fuel Injection Power Supply Relay Power | Green/Yellow |
| 19 | - | - |
| 20 | - | - |
| 21 | - | - |
| 22 | Ground | Brown/Black |
| 23 | To Pin 4 | White |
Ignition Controller: | ||
| Pin | Function | Color |
| 1 | Coil pin 1 | Green |
| 2 | Ground | Brown |
| 3 | Distributor Pin 1 (negative) | Brown/White |
| 4 | Start/Run Power | Black |
| 5 | Distributor Pin 3 (positive) | Red/Black |
| 6 | Distributor Pin 2 (hall sender) | Green/White |
| 7 | - | - |