volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Position of Relays on Electronics Box High, From May 2005|Page 5162 > < Position of Relays on Electronics Box High, From May 2005|Page 5160
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Auxiliary Water Pump Relay: Testing and Inspection

Auxiliary Engine Coolant Pump Relay J496, Checking

Special tools, testers and auxiliary items required

-

Multimeter.

-

wiring diagrams.

Test requirements

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FuseSB15OK.

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Fuse SB29 OK.

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The Ground (GND) connections at the engine and transmission OK.

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The battery voltage at least 12.5 V.

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The generator OK.

Test procedure

-

Perform a preliminary check to verify the customers complaint.  See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Preliminary Check

Start diagnosis

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Switch the ignition on.

-

Using a Multimeter, check the following wiring connection for voltage.

Auxiliary Engine Coolant

Measure to

(EC) Pump Relay J496 socket
1/30

Engine Ground (GND)

-

Switch the ignition off.

Specified value: 12.5 V

If the specified value was not obtained:

-

Check the Auxiliary Engine Coolant (EC) Pump Relay J496 socket 1/30 to the Power Supply Relay (terminal 30, B+) J317 socket 87 for an open
circuit or short to Ground (GND).

-

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

-

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring:

-

Switch the ignition on.

-

Using a Multimeter, check the following wiring connection for voltage.

Auxiliary Engine Coolant

Measure to

(EC) Pump Relay J496 socket
4/86

Engine Ground (GND)

-

Switch the ignition off.

Specified value: 12.5 V

If the specified value was not obtained:

-

Check the Auxiliary Engine Coolant (EC) Pump Relay J496 socket 4/86 to the Power Supply Relay (terminal 30, B+) J317 socket 87 for an open
circuit or short to Ground (GND).

-

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

-

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring:

Checking Ground (GND)

If the manufacturers test box is being used. Perform the following step.

-

Install the test box.

If the manufacturers test box is not being used. Perform the following step.

Position of Relays on Electronics Box High, From May 2005|Page 5162 > < Position of Relays on Electronics Box High, From May 2005|Page 5160