Our 2005 Volkswagen Jetta code P0480 will not go off. What part is needed to correct this problem?

CONTINUATION OF SOLUTION ABOVE TO HELP SOLVE YOUR PROBLEM:

Pre-Requisites for Setting the DTC

DTC is set when:

· Diagnostic Trouble Codes (DTCs) P0117, P0118 not set.

· Ignition ON.

· Ignition voltage is > 10 volts.

· Engine run time is > 5 seconds.



What happens when DTC sets?


When will DTC clear?



1)The Malfunction Indicator Lamp (MIL) will not illuminate


1) A history DTC will clear after 40 successive warm-up cycles without a fault.



2)The ECM will store conditions which were present when the DTC was set as Failure Records data only


2) DTC(s) can be cleared by using the scan tool.



3)This information will not be stored in the Freeze Frame data


-



Diagnostic Tools



An intermittent condition will be located using Freeze Frame and/or failure records data.
The information included in the Freeze Frame and/or failure records data can be utilized in calculating how many miles has been covered since the DTC set, If the DTC cannot be duplicated.
The fail counter and Pass Counter can also be used to determine the number of ignition cycles the diagnostics reported a Freeze Frame conditions (rpm, load, vehicle speed, temperature, etc.) that are noted.
This will isolate automatically when the DTC failed.

SUMMARY OF THE STEPS TO BE TAKEN



DTC P0480 - Low Speed Cooling Fan Relay Circuit Fault (with A/C)



Step


Action


Task Done?

(Yes)


Task Done?

(No)

1


Carry out an EOBD System Test




Now Follow Step 2


Now Follow "On-Board Diagnostic System Check"

2


Keeping the engine OFF turn the ignition switch to ON.
Insert a scan tool.
Operate the relay ON and OFF simultaneously.




Now Follow Step 3


Now Follow Step 5

3


Turn the ignition switch to LOCK mode.
Remove the engine control module (ECM) connector.
Turn On the ignition switch.
Measure the current in low speed relay control circuit, at terminal 10 to ground for 2 minutes using a digital voltmeter (DVM).

Note: Here the value is 0.75 amps

Does the amperage measure less than the specified value?


Now Follow "Diagnostic Aids"


Now Follow Step 4

4


Again turn the ignition switch to LOCK.
Disconnect the relay once more.
Measure the resistance between terminals 85 and 5 in the relay control circuit in the ECM harness connector to ground by means of a DVM.

Does the DVM display infinite resistance?


Now Follow Step 12


Now Follow Step 10

5


Turn the ignition switch to LOCK.
Dissociate the relay.
Connect a test light between the relay coil terminals 86 and 85 in the relay harness connector.
Now turn the ignition switch to ON.
Direct the relay ON and OFF with the help of a scan tool.










Now Follow Step 8


Now Follow Step 6

6


Examine the ignition feed circuit in the relay harness connector keeping the test light connected to ground.




Now Follow Step 7


Now Follow Step 11

7


Turn the ignition switch to LOCK mode once more.
Reconnect the relay.
Disconnect the ECM connector containing the relay control circuit.
Turn the ignition switch to ON.
Search for the relay control circuit at terminal 5 in the ECM harness connector with a fused jumper wire connected to ground.




Now Follow Step 9


Now Follow Step 10

8


Check the connections at the relay.

Do you see any problem?


Now Follow Step 14


Now Follow Step 12

9


Check the connection at the ECM.




Now Follow Step 11


Now Follow Step 13

10


Correct the faulty relay control circuit.




Now Follow Step 14


-

11


Mend the faulty relay ignition feed circuit.




Now Follow Step 14


-

12


Replace the relay.


Now Follow Step 14


-

13


Change the ECM.




Now Follow Step 14


-

14


Remove the DTCs with the help of a Scan Tool.
Start the engine and idle at normal operating temperature.
Control the vehicle within the conditions for setting the DTC as mentioned in the supporting text.

Does the scan tool indicate that this diagnostic has been run and passed?


Now Follow Step 15


Now Follow Step 2

15


Check if any additional DTCs are set.

Do you see any undiagnosed DTC?


Now Follow Applicable DTC table


The System of your vehicle is fine. CONTINUATION OF SOLUTION ABOVE TO HELP SOLVE YOUR PROBLEM: Pre-Requisites for Setting the DTC DTC is set when: · Diagnostic Trouble Codes (DTCs) P0117, P0118 not set. · Ignition ON. · Ignition voltage is > 10 volts. · Engine run time is > 5 seconds. What happens when DTC sets? When will DTC clear? 1)The Malfunction Indicator Lamp (MIL) will not illuminate 1) A history DTC will clear after 40 successive warm-up cycles without a fault. 2)The ECM will store conditions which were present when the DTC was set as Failure Records data only 2) DTC(s) can be cleared by using the scan tool. 3)This information will not be stored in the Freeze Frame data - Diagnostic Tools An intermittent condition will be located using Freeze Frame and/or failure records data. The information included in the Freeze Frame and/or failure records data can be utilized in calculating how many miles has been covered since the DTC set, If the DTC cannot be duplicated. The fail counter and Pass Counter can also be used to determine the number of ignition cycles the diagnostics reported a Freeze Frame conditions (rpm, load, vehicle speed, temperature, etc.) that are noted. This will isolate automatically when the DTC failed. SUMMARY OF THE STEPS TO BE TAKEN DTC P0480 - Low Speed Cooling Fan Relay Circuit Fault (with A/C) Step Action Task Done? (Yes) Task Done? (No) 1 Carry out an EOBD System Test Now Follow Step 2 Now Follow "On-Board Diagnostic System Check" 2 Keeping the engine OFF turn the ignition switch to ON. Insert a scan tool. Operate the relay ON and OFF simultaneously. Now Follow Step 3 Now Follow Step 5 3 Turn the ignition switch to LOCK mode. Remove the engine control module (ECM) connector. Turn On the ignition switch. Measure the current in low speed relay control circuit, at terminal 10 to ground for 2 minutes using a digital voltmeter (DVM). Note: Here the value is 0.75 amps Does the amperage measure less than the specified value? Now Follow "Diagnostic Aids" Now Follow Step 4 4 Again turn the ignition switch to LOCK. Disconnect the relay once more. Measure the resistance between terminals 85 and 5 in the relay control circuit in the ECM harness connector to ground by means of a DVM. Does the DVM display infinite resistance? Now Follow Step 12 Now Follow Step 10 5 Turn the ignition switch to LOCK. Dissociate the relay. Connect a test light between the relay coil terminals 86 and 85 in the relay harness connector. Now turn the ignition switch to ON. Direct the relay ON and OFF with the help of a scan tool. Now Follow Step 8 Now Follow Step 6 6 Examine the ignition feed circuit in the relay harness connector keeping the test light connected to ground. Now Follow Step 7 Now Follow Step 11 7 Turn the ignition switch to LOCK mode once more. Reconnect the relay. Disconnect the ECM connector containing the relay control circuit. Turn the ignition switch to ON. Search for the relay control circuit at terminal 5 in the ECM harness connector with a fused jumper wire connected to ground. Now Follow Step 9 Now Follow Step 10 8 Check the connections at the relay. Do you see any problem? Now Follow Step 14 Now Follow Step 12 9 Check the connection at the ECM. Now Follow Step 11 Now Follow Step 13 10 Correct the faulty relay control circuit. Now Follow Step 14 - 11 Mend the faulty relay ignition feed circuit. Now Follow Step 14 - 12 Replace the relay. Now Follow Step 14 - 13 Change the ECM. Now Follow Step 14 - 14 Remove the DTCs with the help of a Scan Tool. Start the engine and idle at normal operating temperature. Control the vehicle within the conditions for setting the DTC as mentioned in the supporting text. Does the scan tool indicate that this diagnostic has been run and passed? Now Follow Step 15 Now Follow Step 2 15 Check if any additional DTCs are set. Do you see any undiagnosed DTC? Now Follow Applicable DTC table The System of your vehicle is fine.

i KNOW THIS IS A LOT OF INFORMATION FOR YOU, BUT THIS INFORMATION I JUST GAVE YOU, HAS GAVE YOU EVERYTHING YOU NEED AND THEN SOME ABOUT YOUR CODE THAT CAME UP AND THINGS TO LOOK FOR TO SOLVE THIS PROBLEM, THANK YOU, MIKE FROM FIXYA i KNOW THIS IS A LOT OF INFORMATION FOR YOU, BUT THIS INFORMATION I JUST GAVE YOU, HAS GAVE YOU EVERYTHING YOU NEED AND THEN SOME ABOUT YOUR CODE THAT CAME UP AND THINGS TO LOOK FOR TO SOLVE THIS PROBLEM, THANK YOU, MIKE FROM FIXYA