Output Diagnostic Test Mode

OUTPUT DIAGNOSTIC TEST MODE USING ADDRESS WORD 01
Address Word 01 functions are only accessable with the VAG 1551 Scan Tool or the VAG 1552 Scan Tool. Diagnosis with a Generic Scan Tool is possible using the diagnostic modes of Address Word 33. The VAG 1551 and 1552 Scan Tools can access Address Word 33 modes in "generic" mode.

COMPONENTS ACTIVATED
^ Fuel Pump (FP) relay - J17
^ Idle Air Control (IAC) valve - N71
^ Intake Manifold change-over valve - N156
^ EVAP canister purge regulator valve - N80
^ Exhaust Gas Recirculation (EGR) vacuum regulator valve - N18

NOTES:
The Output Diagnostic Test (DTM) can only be carried out with the ignition switched ON and the engine NOT running.
The Output DTM will be interrupted if engine is started or if a speed pulse is detected.
During Output DTM, the individual components are activated until the "ARROW" button is used to switch to the next component or the Output DTM is ended.
The components are checked by listening for sounds of activation, and/or by touching.
If the output DTM is to be repeated without running the engine, switch OFF the ignition for approx. 20 seconds.

TEST REQUIREMENTS

Electronic Box With Circuit Breakers:

- Fuse 17 and engine electronics circuit breakers 1, 2, 3 and 4 (holder colors black, brown, red and yellow) in the electronic box in passenger floor OK.
- Fuel pump relay OK.

PROCEDURE
- Ensure Test Requirements are met.

Data Link Connector Cover:

- Remove Data Link Connector (DLC) cover located in front tray of center console.

Connecting VAG 1551 Scan Tool:

- Connect Scan Tool VAG Scan Tool using adaptor cable VAG 1551/3 to Data Link Connector (DLC). Refer to Diagnosis with Address Word 01 for proper connection and operation of the VAG Scan Tool. Diagnosis with Address Word 01

- Advance through Scan Tool program until display appears as shown:

Rapid data transfer HELP
Select function XX

- Press buttons 0 and 3 to select function 03 "Output Diagnostic Test Mode".
- Display will appear as shown:

Rapid data transfer Q
03 - Output Diagnostic Test Mode

- Press Q button to enter input.
- Display will appear as shown:

Output Diagnostic Test Mode
Fuel Pump relay - J17

^ Fuel pump relay must audibly activate (click).
^ Fuel pump must audibly run.
^ Streaming noise of fuel flowing through fuel pressure regulator must be audible.

If the relay does not operate:
- Check the fuel pump relay activation.

If the relay operates:
- Press the "Arrow" button.
- Display will appear as shown:

Output Diagnostic Test Mode ->
Idle Air Control Valve - N71

The Idle Air Control (IAC) valve is operated (clicks) until the next DTM component is selected by pressing the "Arrow" button.

If valve does not operate (does not click):
- Check the IAC valve.

If valve operates:
- Press the "Arrow" button.
- Display will appear as shown:

Output Diagnostic Test Mode ->
Intake Manifold Changeover Valve -N156

The intake manifold change-over valve is operated (clicks) until the next DTM component is selected by pressing the "Arrow" button.

If valve does not operate (does not click):
- Check the intake manifold change-over valve.

If valve operates:
- Press the "Arrow" button.
- Display will appear as shown:

Output Diagnostic Test Mode ->
EVAP canister purge regulator valve -N 80

The EVAP canister purge regulator valve is operated (clicks) until the next DTM component is selected by pressing the "Arrow" button.

If valve does not operate (does not click):
- Check the EVAP canister purge regulator valve.

If valve operates:
- Press the "Arrow" button.
- Display will appear as shown:

Output Diagnostic Test Mode ->
EGR Vacuum Regulator Solenoid Valve -N18

The EGR vacuum regulator solenoid valve is operated (clicks) until the test is ended by pressing the "Arrow" button.

If valve does not operate (does not click):
- Check the EGR vacuum regulator solenoid valve.

If valve operates:
- Press the "Arrow" button.
- Display will appear as shown:

Rapid data transfer HELP
Select function XX

NOTE: To repeat the DTM function 03, Switch ignition OFF for approximately 20 seconds before reselecting output Diagnostic Test Mode.