Fuel pump relay (102)
| Fuel pump relay (102) |
| Location |
Fuel pump relay (102)
| Main task |
The relay feeds the fuel pump and the oxygen sensor preheating.
| Type |
| Connection |
| Pin No. | Signal type | Description |
| 1 (86) | Control | Relay coil control lead. Supplied B+ from ECM pin 51(A). |
| 2 (85) | Ground | Relay coil grounding to grounding point G34S. |
| 3 (30) | +30 | Power supply to the relay contact from fuse 2 (727). |
| 5 (87) | Output, B+ | Relay switch's output. |
The fuel pump relay is controlled from pin 51(A), which supplies B+ when the relay pulls. When the ignition is switched "ON", the fuel pump relay pulls for 1 second. This builds up pressure before preinjection, which occurs when the crankshaft begins to rotate.
When the crankshaft then rotates, relay 7 is pulled until the ignition leaves the ON position or the crankshaft stops rotating.
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
