Question about 1997 GMC Sierra

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Picture of wastegate solinod - 1997 GMC Sierra

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You need the dealer fo rthat, it is not available in the aftermarket.

Posted on Apr 12, 2014

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Just had new turbo fitted but car is lacking power,took car back to garage turbo is working as it should,had it scanned came up with injector pump, cleared fault still the same, disconnected maf sensor is...


In the old days the turbo wastegate was closed and the turbo left to its own devices to produce as much pressure as it could until it reached maximum when the wastegate would open.

In modern times the turbo wastegate is open and no pressure is produced unless the engine management decides to close the wastegate.

The wastegate is closed (mostly) by a vacuum servo and the vacuum supply is switched on/exhausted by the management computer as it decides.

Conditions of low boost/power loss or overboost can be difficult to locate/cure. It is usually pointless relying on basic scanners and code readers because they are often misleading.
It is far better to entrust diagnosis to a diagnostic specialist who will have the equipment and experience to view the live data and make sense of it.

Dec 28, 2017 | 2001 Toyota RAV4

1 Answer

Audi 1.8t over boost


problem could either be wastegate not getting vacuum.make sure wastegate actuator getting vacuum if no find fix vacuum hose leaks if wastegate getting vacuum either wastegate actuator binding stuck or you have restricted exhaust system.

Sep 21, 2013 | 2000 Audi A4

1 Answer

My 1990 Nissan 300zx turbo it looses power wanting to turn off coming to a complete stop........


turbocharger waste gate actuator either sticking or faulty spray some WD 40 ON WASTEGATE ACTUATOR LINKAGE FREE IT UP COULD BE STICKING ALSO MAKE SURE WASTEGATE ACTUATOR GETTING VACUUM AND CHECK CONDITION OF VACUUM HOSE TO WASTEGATE ACTUATOR.IF ALL IS GOOD TURBOCHARGER COULD BE BAD ALSO MAKE SURE YOU DONT HAVE RESTRICTED EXHAUST SYSTEM PLUGGED MUFFLER OR PLUGGED CATALYTIC CONVERTER..

Feb 18, 2012 | 1990 Nissan 300ZX

2 Answers

Jeep grand cherokee 2.7 crd I have a problem about code p0243 thans for your help.


DTC P0243 - Turbo/Super Charger Wastegate Solenoid A
Description: Open or shorted condition detected in the turbocharger wastegate solenoid control circuit.


Here is the flow chart for that code (some images could need to clicking for zoom)...

P0243-WASTEGATE PRESSURE CONTROL PWM

zjlimited_337.gif

For a complete wiring diagram Refer to Section 8W.

When Monitored: When the ignition is on.
Set Condition: The ECM detects an open or short circuit in the Wastegate solenoid circuit.

Possible Causes
DAMAGED WIRING HARNESS OR CONNECTORS
WASTEGATE SOLENOID
(F504) FUSED IGNITION SWITCH OUTPUT OPEN
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN
(K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND
(K139) WASTEGATE SOLENOID DRIVER SHORTED TO VOLTAGE
(K139) WASTEGATE SOLENOID DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT
ECM
INTERMITTENT CONDITION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Diagnostic Test
1. DAMAGED WIRING HARNESS OR CONNECTORS

zjlimited_338.gif

Turn Ignition off.
Disconnect the ECM harness connectors.
Disconnect the Wastegate Solenoid harness connector.

NOTE: Check connectors - Clean/repair as necessary.


Are any wires or pins damaged?

Yes
Repair or replace any damaged wire or connectors.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 2


2. WASTEGATE SOLENOID

zjlimited_339.gif

Reconnect the ECM harness connector.
Reconnect the disconnected Wastegate Solenoid harness connector.
Turn the Ignition on, engine not running.
Disconnect the Wastegate Solenoid harness connector.
Connect an incandescent test light across the supply and driver pins at the Wastegate Solenoid harness connector.

NOTE: The ECM will perform a self check of the circuit after approximately 30 seconds, which should light the incandescent test light.


Does the light illuminate brightly after 30 seconds of being connected?

Yes
Replace the Wastegate Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 3


3. (F504) FUSED IGNITION SWITCH OUTPUT OPEN

zjlimited_340.gif

Connect an test light between the Wastegate Solenoid connector Fused ignition switch output circuit and battery negative.
Compare the test light brightness to that of a direct connection to the battery.

Does the light illuminate brightly?
Yes
Go To 4

No
Repair the open (F504) Fused Ignition switch output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).



4. (K139) WASTEGATE SOLENOID DRIVER CIRCUIT OPEN

zjlimited_341.gif

Disconnect the ECM harness connectors.
Measure the resistance of the Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and the ECM harness connector.

Is the resistance less than 10 Ohms?
Yes
Go To 5

No
Repair the open (K139) Wastegate Solenoid control circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


5. (K139) WASTEGATE SOLENOID CIRCUIT SHORTED TO GROUND

zjlimited_343.gif

Measure the resistance of the (K139) Wastegate Solenoid driver circuit between the Wastegate Solenoid harness connector and battery negative.

Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

No
Go To 6


6. (K139) WASTEGATE SOLENOID DRIVER SHORTED TO VOLTAGE

zjlimited_344.gif

Measure the voltage between the (K139) Wastegate Solenoid driver circuit at the Wastegate Solenoid connector and battery negative.

Is the voltage less than 1 volt?
Yes
Go To 7

No
Repair the (K139) Wastegate solenoid driver shorted to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).


7. (K139) WASTEGATE SOLENOID DRIVER CIRCUIT SHORTED TO ANOTHER CIRCUIT

zjlimited_345.gif

Measure the resistance between the (K139) Wastegate Solenoid driver circuit in the ECM harness connector and all other circuits in the ECM harness connectors.

Is the resistance less than 10 Ohms?
Yes
Repair the (K139) Wastegate solenoid circuit shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)


No
Go To8


8. WASTEGATE SOLENOID

zjlimited_346.gif
Reconnect the ECM harness connector.
Reconnect the disconnected Wastegate Solenoid harness connector.
Turn the Ignition on, engine not running.
Disconnect the Wastegate Solenoid harness connector.
Connect an incandescent test light across the supply and driver pins at the Wastegate Solenoid harness connector.

NOTE: The ECM will perform a self check of the circuit after approximately 30 seconds, which should light the incandescent test light.


Does the light illuminate brightly after 30 seconds of being connected?
Yes
Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).

No
Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).

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Keep us updates.

May 04, 2011 | 2003 Jeep Grand Cherokee

1 Answer

I got a 1994 dodge intrepid and I have 2 codes up on it and i dont know what they are. Code 35 and 45?


Fault Code 35
Description: Radiator fan relay circuit is open or shorted
Power loss light: Off
Limp-in mode: None

Possible Causes:
Bad connection or wiring - Check the wiring and connections between the logic module and the relay. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Bad relay - Disconnect the relay and apply 12V across the coil terminals (between the white wire and either of the other two terminals on the small connector). You should hear a click for either of the two termials and the connection between the grey wire and the other two terminals of the large connector should be shorted.

Diagnostic Method
Trigger Parameters
- Near 0V or near 12V not detected when the relay is turned on or off, respectively
Results If Component Fails
Fault code 35 is stored.


Fault Code 45
Notes: For Turbo models only

Description: Turbo boost limit exceeded
Power loss light: On
Limp-in mode: None

Possible Causes
Vaccum leak - Check all vaccum lines between the wastegate actuator, manifold, and wastegate solenoid. Also check the line to the MAP sensor. Repair or replace any bad lines.

Wastegate solenoid failure - The wastegate solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page.

Bad connection or wiring - Check the wiring and connections between the logic modle (or SMEC) and the wastegate solenoid. Clean and regrease any corroded connectors with dielectric grease and repair any shorts. This condition may be accompanied by a code 36.

Wastegate actuator spring failure - Try to slide the wastegate to wastegate actuator push rod into the actuator. It should not move. Try to pull it out. If it pulls out with little effort (even if it springs back in), replace the actuator.

Jammed wastegate - Disconnect the wastegate actuator pushrod and swing the wastegate arm on top of the turbo. It should have about a 50 degree swing. Make sure the lever and push rod are clear of any obsticles that may cause them to jam (the heat shield below the fuel rail is a major culprit).

Diagnostic Method
Trigger Parameters
- MAP sensor output voltage has exceeded overboost cut-off point

zjlimited_942.jpg

Following years are probably the same as 1987, but I don't have any hard data to back that up. Some have said that 4.74V was the max for Turbo I engines of later years. Some information indicates that the Turbo II with an automatic had a cut-off of 4.96V, but I don't know of any Turbo II vehicle that had an automatic transmission.

Results If Component Fails
A fault code 45 is stored, the power loss light is turned on, and the fuel injectors are shut off. Once the boost has fallen to 3 psi to 5 psi, the fuel injectors are turned back on and the power loss light is turned off. The overboost cut-off point for a particular vehicle depends on the year, engine, and transmission.


Keep us updated.

Mar 29, 2011 | 1994 Dodge Intrepid

2 Answers

Check engine codes for a 1997 stratus the codes coming up are 12 31 and 55


12 Recently disconnected the battery (always stored)
55 End test.

CODE 31... depending on the model, code 31 can refer to two different systems. Please choose from one of the above links for specific information on each system.

Wastegate Solenoid Circuit Error
The ECM regulates turbocharger boost by opening and closing the "wastegate" as necessary. (The wastegate is a vacuum operated bypass valve that limits the ability of the turbo to provide boost.) The Wastegate Solenoid regulates the vacuum supply to the wastegate for proper operation.

Fault Code Description
  • 31 - Wastegate Solenoid circuit error
Symptoms
  • Lack of power or engine "ping" due to overboost by the turbocharger
Common Problems
  • The wastegate solenoid would be the most common cause for code 31 to set
  • Code 31 does not indicate a problem with the turbocharger or wastegate


Gear Position Switch (PRNDL) Error The Gear Position switch tells the ECM which position the shifter is in. The ECM will use this information to inhibit starter operation, change the transmission shift pattern as necessary, and provide the information for the electronic shift indicator display on the dash.

Fault Code Description
  • 31 - Gear Position switch (PRNDL) error
Symptoms
  • Engine may not crank over in Park or Neutral
  • Electronic shift indicator may flash
Common Problems
A maladjusted or failed Gear Position switch would be the most common cause for a code 31


Hope helps with this (remember rated this post).

Jun 30, 2010 | 1997 Dodge Stratus

1 Answer

What is a wastegate on 2004 dodge 5.9L cummins diesel?


The wastegate is a valve that regulates the ammount of boost that you turbocharger produces. The wastegate opens to release boost pressure.
This valve is electronicly controlled based on inputs to the onboard computer.

Mar 10, 2010 | 2004 Dodge Ram 2500

2 Answers

03 gli there is lag between 2500 and 3200 rpm then seems fine at lower and higher rpms =6 spd


First check for a vacuum leak under the hood.

Inspect ALL of the connections of small vacuum lines as they connect to nipples on parts.

Make sure the vacuum reservoir. A black boxy thing near the firewall does not have a hole in it and that the one way valve connected to it is functioning well.

Jul 29, 2009 | 2003 Volkswagen Jetta TDI

1 Answer

1996 subaru legacy rs boost loss


I don't know much about Subaru but I expect the turbo wastegate is controlled by vacuum which is switched by the engine management system.

In the old days the turbo wastegate was normally closed and the manifold pressure was fed into a servo which opened the gate at the predetermined pressure.

The new way of doing things is to have the wastegate normally open and the turbo producing no pressure until the engine management decides the time is right and it switches a vacuum supply to a vacuum servo which then closes the wastegate. With this system the wastegate is constantly moving and so is unlikely to give trouble though the vacuum servo sometimes leaks and vacuum lines give trouble.

A fellow I know had a similar problem where the engine check light would light up and he would lose performance. In theory this was because of an overboost condition but the repair shop after fiddling around with it for a week fitted a new EGR valve to produce a cure.

Sep 04, 2017 | 1996 Subaru Legacy

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