Fuel Pump 2 Relay, Checking

Fuel Pump 2 Relay, Checking

• Fuel Pump (FP) Relay 2 is located in relay- and fuse holder in luggage compartment, right side, relay position 3.

Voltage Supply, Checking

- Remove Fuel Pump (FP) 2 Relay (J49) from relay position 3.

- Switch ignition on.

- Connect portable multimeter (VAG1526) in sequence between terminals 3 (B+, terminal 15) and 2 (Ground -GND-) as well as 1 (B+, terminal 30) and 2 (Ground GND) of relay socket.

Specified value: approx. battery voltage respectively.

- If no battery voltage is displayed, measure plus terminals to vehicle Ground (GND) as a test.

- If there is still no battery voltage, check plus wires (terminal 15/terminal 30) for open circuit.

- If battery voltage is displayed when measuring to vehicle GND and not at terminal 2, check wire connection from terminal 2 via fuse (in relay- and fuse holder in luggage compartment, right side) to Transfer Fuel Pump (FP) (G6).

Activation, Checking

- Connect voltage test lamp (VAG1527) between terminal 3 (B+, terminal 15) and 4 (Ground (GND)) activation of Engine Control Module (ECM)).

- When switching on ignition, voltage test lamp must light up for approx. 1 second and then go out. When operating starter, voltage test lamp must light up constantly.

• Voltage test lamps with low current draw do not go out completely after 1 second, but rather light up weakly until starter is operated.

If voltage test lamp now lights up, replace Fuel Pump (FP) 2 Relay (J49).

If voltage test lamp does not light up, check wire as follows:

- Connect test box (VAG1598/31) to wiring harness of Engine Control Module (ECM).

- Connect portable multimeter (VAG1526) between terminal 5 of relay socket and socket 45 of test box and check wire connection for continuity.

- If specified value is not obtained, check wire connection for open circuit or short circuit.

- If there is no open circuit and voltage test lamp does not light up, replace Engine Control Module (ECM), generate readiness code again => [ Readiness Code, Generating ] Monitors, Trips, Drive Cycles and Readiness Codes.

- Read readiness code => [ Readiness Code, Reading ] Monitors, Trips, Drive Cycles and Readiness Codes. If DTC memory was erased, readiness code must be generated again => [ Readiness Code, Generating ] Monitors, Trips, Drive Cycles and Readiness Codes