Engine/Transmission (1998.5 - 2002) Check engin light

[kccoon]

Hi i have a 1999 and have been having an issue with my check engine light coming on but with no drive ability issues. i went to cummins northwest today and they hooked up to it and read two codes one active and one inactive. active was #382 and the inactive was #3 one was for the cold start aid and the other was a voltage problem in the vp. Does anyone know anything about these codes. I think that the vp is fine because they are both a voltage code it makes me think i have a power problem.

Please help

 

[JLandry]

kccoon,



I don't know what Cummins fault code "3" is (as far as I know, all Cummins fault codes have three digits), but Cummins fault code "382" is the same as the OBDII "P0382" DTC (Diagnostic Trouble Code). It indicates the ECM (Engine Control Module) detected the number 2 air heater relay failed to operate properly.



Be aware the software Cummins uses can only check the ECM for fault codes and can't check your truck's PCM (Powertrain Control Module). So buy yourself an inexpensive code scanner for Christmas from someplace like Wal-Mart or your favorite auto parts store so you can read trouble codes on your own. All you need is a scanner which displays the trouble code numbers and clears them. Don't bother paying more for one with fancy features and tries to explain what the trouble code means. You can search for the trouble code on Google and here on the TDR forum to get much more detail.



As far as that P0382 code goes, you'll have to test the #2 intake air heater circuit to determine where the problem is... possibly a bad relay. Check out the picture below to locate the relays and the attached .pdf file which is the wiring diagram. Hopefully those will help.



Good luck,



John L.

 

[kccoon]

thanks for the info i realized i said 3 but meant 362 and 382so u did your best with the info that you gave me. what would you suggest as being the best way to check the relay to see if it is working up to par. cummins said something about the heater being on all the time because their computer told then it was on even thought the intake manifold was above 150 degrees and they are only supposed to be on bellow 50 degrees. thanks for the help

 

[JLandry]

​

... i said 3 but meant 362

OK... Cummins fault 362 is equivalent to OBDII DTC P0253, which is "FUEL INJECTION PUMP FUEL VALVE OPEN CIRCUIT. " This is a VP44 internal fault meaning low current or no current has been detected at the VP44's internal fuel control valve. The following items can cause this:



1. A faulty fuel injection pump relay located in the PDC (Power Distribution Center), which is on the driver's fender under the hood. Solution: Replace the relay.



2. Or it can simply be caused by low battery voltage, typically when cranking the engine. Solution: Charge the batteries and replace if needed.



3. Or there could be something wrong inside the VP44. Solution: Replace the VP44.



I'd start by clearing the trouble codes with a code scanner, drive the truck again, and check to see which ones come back. If the P0253 shows up again, replace the fuel injection pump relay, clear the trouble code again, and see of it comes back. If it does again, then pull the fuel injection pump relay so the engine won't start, and check the battery voltage while cranking the engine. This will set one or more trouble codes which you'll need to clear after the test. If the battery has at least 8 volts during cranking, then the VP44 must have the problem and will need to be replaced.



To troubleshoot that P0382 DTC (the INTAKE AIR HEATER RELAY #2 CONTROL CIRCUIT), follow these steps until you find the cause:



Step 1

Ignition Off

Disconnect the Ground Connector at Heater Relay #2.

With an ohmmeter, measure the Ground Circuit to ground.

Is the resistance below 5. 0 ohms?

If NOT, repair the open Ground Circuit.​

Step 2

Ignition Off

Disconnect the Intake Air Heater Relay #2 Control Circuit.

Disconnect the ECM Connector.

Using an ohmmeter, measure between the Intake Air Heater Relay #2 Control Circuit and ground.

Is the resistance below 5. 0 ohms?

If YES, repair the Intake Air Heater Relay #2 Control Circuit for a short to ground.​

Step 3

Ignition Off

Disconnect the Intake Air Heater Relay #2 Control Circuit.

Connect one end of a jumper wire to the open relay terminal and briefly tap the other end of the jumper wire to Battery (+) terminal.

Did the Intake Air Heater Relay click?

If NO, replace the Intake Air Heater Relay #2.​

Step 4

Ignition Off

Disconnect the Intake Air Heater Relay #2 Control Circuit.

Disconnect the ECM Connector.

Using an ohmmeter, measure the resistance of the Intake Air Heater Relay #2 Control Circuit from the ECM to the Relay.

Is the resistance below 5. 0 ohms?

If NO, repair the open Intake Air Heater Relay #2 Control Circuit.​

Step 5

Since no other causes remain, the ECM may be at fault and needs replacement.​

Let us know how things work out.



Best regards,



John L.

 

[kccoon]

Ok thanks for the help i will try these when i get a chance i have cleared them several time and they re apear when i get on the throttle above like 65 mph its aggravating. ok ill let you know what i find thanks

 

[kccoon]

OK so i did some investigation and i found a trigger wire that had rattled loose from the heater grid relay so im hoping that i have cured my check engine light for that but as for the vp code i dont know what to do its still a problem and surges if im really on it when im on the freeway above speeds of 80.