Daewoo Musso. Manual - part 175

1F2-60  M161 ENGINE CONTROLS

Tools Required

661 589 00 46 00  Cap Remover

Removal & Installation Procedure

1. Disconnect the negative battery cable.

2. Disconnect the harness connector (1).

3. Disconnect the fuel supply (6) and return (5) pipes.

4. Using a special tool, Unscrew the eight fuel retaining bolts

and remove the pump from fuel tank.

Notice

Check the condition of the seal and replace if necessary.

Drain the fuel before removing the pump.

M161 ENGINE CONTROLS  1F2-61

Notice

Replace the fuel pump relay if the measured value is over
9A.

Notice

Check the fuel filter and fuel line when the fuel delivery is
not within specified value.

Measure the Current Consumption of Fuel Pump

1. Remove the fuel pump relay from fuse and relay box in

trunk, and turn the ignition switch to "ON" position.

2. Using a multi-tester, measure the current consumption by

connecting the terminal No.1 and No.3 of pump.

Measure the Fuel Delivery From the Fuel Pump

1. Disconnect the return pipe from fuel distributor and insert

the appropriate hose into it.

2. Place the hose end into the beaker with the minimum capacity

of 1Liter.

3. Turn the ignition switch to "ON" position.

4. Connect the terminal No.33 and No.5 of ECU with a service

wire.

5. Measure the fuel delivery from the fuel pump.

   1Liter/max.35sec.

Specifed Value

5 - 9A

Specifed Value

1F2-62  M161 ENGINE CONTROLS

PURGE SWITCHOVER VALVE

1 Purge Control valve
2 Line to engine
3 Line to canister
4 Canister

Functions

The fuel vaporization control system is installed to inhibit the
fuel vaporized gas from discharging into the atmosphere.  The
fuel vaporized gas that is accumulated in the canister abstracts
through the purge switchover valve purification during the
engine combustion (except the decreasing mode) and coolant
temperature of over 80

°

C. For this reason, the ECU transacts

the engine speed, air inflow quantity, coolant temperature, and
intake temperature.

The purge switchover valve is activated by the ECU frequency
according with the engine rotating speed to adjust the
purification rate. The purification rate is determined by the
continuous valve opening interval.

The purge switchover valve is activated by the ECU for the
following conditions :

l

Coolant temperature of over 80

°

C

l

Engine speed of over 1000rpm

l

2 Minutes after starting

l

When the fuel cut-off mode is not activated

M161 ENGINE CONTROLS  1F2-63

4. Remove the line to canister and measure the pressure with

the vacuum pressure gauge.

Test

1. Maintain the normal temperature and idling state by

operating the engine.

2. Connect the ECU terminal No.11 and No.34 and check for

normal operation through the output waves using the
scanner.

Notice

Test during purge control switchover valve operation after
the minimum of 1 minute after the engine turned on.

3. Connect the ECU terminal No.34 and No.10 and check for

current consumption during the ignition switch ON.

Purge switchover valve output wave

 Specified Value

0.3 - 0.5

 Specified Value

 > 50mbar

  (after approx. 1min.)

 purge switchover valve

operates at this time

Notice

Test while at normal temperature and at idling state by
operating the engine.