Porshe 911 (997). Manual - part 122

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Diagnostic system: reading out fault memory and activating systems

Subsequent work for carbon canister

645

- Preliminary work for quantity delivered by fuel pump
- Checking quantity delivered by fuel pump
- Subsequent work for quantity delivered by fuel pump

Tools

Designation

Type

Number

Explanation

measurement adapter

special tool

9705

PIWIS Tester

special tool

9718

Preliminary work for quantity delivered by fuel pump

Preliminary work for quantity delivered by fuel pump

Note

The battery voltage must not fall below 12 volts during the fuel delivery rate check.

• 

1. Check the battery charging condition e.g. using a voltmeter or the Porsche PIWIS Tester. The battery

voltage must not fall below 12 volts during the check.

2. Remove rear cover and middle section of the middle cover on the underbody. → 519419 Removing and

installing the rear cover - chapter on "removing", → 519319 Removing and installing the middle cover -

646

chapter on "removing"

Checking quantity delivered by fuel pump

Checking quantity delivered by fuel pump

Note

The battery voltage must not fall below 12 volts during the fuel delivery rate check.

• 

Example of warning sign for naked flames

DANGER

Risk of fire from escaping fuel.

Danger of fatal injury and damage to property.

• 

→ Observe basic safety instruction when working on the fuel system, → 201000  Precautionary measures

when working on fuel system.

→ Secure working area.

1. Attach or mount a warning sign in a clearly visible position on the

vehicle.

2. Reduce fuel pump supply pressure. To do this, remove the cover of the fuse carrier in the left

footwell and take out the fuse for the fuel pump - level D, fuse F1 (1st from left) -. Then start the
engine for several seconds. This procedure does not cause an entry to be made in the fault memory.
Insert the fuse again and replace the cover.

3. Connect the Porsche PIWIS Tester PIWIS Tester 9718 to the input socket in the vehicle using the adapter

lead, switch on the ignition and switch off all loads, such as the radio and air conditioning. Switch on the

Diagnostic system: reading out fault memory and activating systems

Preliminary work for quantity delivered by fuel pump

647

Tester and select the vehicle (option: Diagnostics).

PIWIS Tester 1

4. Run the individual control unit search for DME using the Porsche PIWIS Tester. To do this, select

DME with the tracer pen and press F12 >>.

5. Select the Drive links item and then select the fuel pump

relay.

Measurement adapter 9705

6. Have a measurement adapter 9705, a fuel-resistant container, a measuring cup and a stopwatch to hand

for measuring.

Rapid-action coupling on fuel pressure line

DANGER

Risk of fire from escaping fuel.

Danger of fatal injury and damage to property.

• 

→ Observe basic safety instruction when working on the fuel system, → 201000  Precautionary measures

when working on fuel system.

Diagnostic system: reading out fault memory and activating systems

Checking quantity delivered by fuel pump

648