1993 Nissan 240SX code 32 and transmission sometimes doesnt

Tiny
JUANFARIASC
  • MEMBER
  • 1993 NISSAN 240SX
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I get code 32:EGR system failure so, I changed the BPT, EGR valve, and horses-but I still get code 32â� ¦One other thing that is happening to the car is that the transmission sometimes wont sift out of 1st gear, but if I pull over to the side of the road and turn off the car and restart it the transmission starts sifting normally again. I have done all maintenance as required via mileage. What could be the problem with my car?
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Monday, November 16th, 2009 AT 9:12 PM

11 Replies

Tiny
KHLOW2008
  • EXPERT
Hi juanfariasc,

Thank you for the donation.

The problem of the EGR and transmission not shifting could be related if it is due to a power supply interruption.

Here are the diagnostics for Code 32. The item for checking power should be given additional attention but since problem is intermittent, it might not show all the time so you might have difficulty diagnosing it.

DTC 32: EGR FUNCTION

NOTE: On California models, DO NOT perform this test if DTC 12, 13, 35, or 43 is present.

1 . Check Vacuum Source To EGR Valve - Start engine and warm to operating temperature. Disconnect hose from EGR valve and check vacuum. Vacuum should not be present. Raise engine speed to about 2000 RPM and check vacuum. Vacuum should be present. If vacuum is not as specified, go to next step. If vacuum is as specified, inspect EGR valve and EGR Control-BPT valve. Refer to SYSTEM/COMPONENT TESTS article. Repair or replace as necessary and perform FINAL CHECK in this article.

2 . Check Control Function - If vacuum is not present at about 2000 RPM, measure voltage between ECM terminal No. 105 and ground. See Fig. 3 and Fig. 23 . At idle, voltage should be about zero volts. At 2000 RPM, voltage should be battery voltage. If voltage is not as specified, go to next step. If voltage is as specified, inspect vacuum hose for clogging, cracks or proper connection. Repair vacuum hose as necessary.

3 . Check Power Supply - Turn ignition off. Disconnect EGR and canister control solenoid valve harness connector. See Fig. 22 . Turn ignition on. Measure voltage between harness connector terminal "b" (Brown wire) and ground. See Fig. 24 . If battery voltage is not present, check 10-amp fuse, wiring harness and harness connectors. Repair or replace as necessary. If battery voltage is present, go to next step.

4 . Check Output Signal Circuit - Turn engine off. Leave ECM disconnected. Check continuity between ECM terminal No. 105 and EGR and canister control solenoid valve harness connector terminal "a" (Light Green wire) See Fig. 3 and Fig. 25 . If continuity is present, go to next step. If continuity is not present, repair harness or connectors as necessary.

5 . Check Component - Inspect EGR and canister control solenoid valve. Refer to SYSTEM/COMPONENT TESTS article. Measure resistance of EGR temperature sensor. See SYSTEM/COMPONENT TESTS article. Replace EGR and canister control solenoid valve and/or EGR temperature sensor if necessary, and perform FINAL CHECK in this article.

6 . Check Component Using Consult Tester (J-38465) - Turn ignition off and connect Consult tester. Connect ECM harness connector and EGR and canister control solenoid valve harness connector. Turn ignition on. Using Consult tester, perform EGRC SOL/V CIRCUIT in FUNCTION TEST mode. Turn EGR and canister control solenoid valve on and off using Consult tester in ACTIVE TEST mode. Replace EGR and canister control solenoid valve if operating sounds are not heard. Perform FINAL CHECK in this article.


http://www.2carpros.com/forum/automotive_pictures/192750_ECM93_240SXFig03_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_DTC32_93_240SXFig22_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_DTC32_93_240SXFig23_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_DTC32_93_240SXFig24_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_DTC32_93_240SXFig25_1.jpg



Any malfunction in the EGR system can cause the engine to run rough ( shaking ) and the strong gas smell as the combustion is incomplete.

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Wednesday, November 18th, 2009 AT 11:08 AM
Tiny
JUANFARIASC
  • MEMBER
Thank u, but where do I go to see the SYSTEM/COMPONENT TESTS article
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Wednesday, November 18th, 2009 AT 3:46 PM
Tiny
KHLOW2008
  • EXPERT
Sorry to inform you that the system component test is a very large article and not possible for me to post all of them here.

Let me know which component you wish to test and I can get them for you.
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Thursday, November 19th, 2009 AT 5:57 AM
Tiny
JUANFARIASC
  • MEMBER
I tested the egr for vacuum at 2000+ RPM and there was some (a little) suction. So, now I have to check the erg valve and bpt valve, so im going to need the SYSTEM/COMPONENT TESTS article to test for the erg valve and bpt valve. Maybe u could send me the one to check the ERG valve 1st than the bpt valve check there after.
Thank you.
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Thursday, November 19th, 2009 AT 7:27 PM
Tiny
KHLOW2008
  • EXPERT
Here are the testing procedures.

EGR Valve

Using a hand-held vacuum pump, apply vacuum to EGR valve diaphragm. See Fig. 26 . Replace EGR valve if pintle does not open.


http://www.2carpros.com/forum/automotive_pictures/192750_EGRBPT93_240SXFig26_1.jpg



EGR Backpressure Transducer (EGR-BPT)

Plug one port of EGR backpressure transducer (EGR-BPT) and apply vacuum to other port. See Fig. 24 and Fig. 25 . Vacuum should NOT hold. Apply light pressure to bottom port (DO NOT apply more pressure than is necessary to cause vacuum to hold). If vacuum does not hold with pressure applied, replace EGR-BPT valve.


http://www.2carpros.com/forum/automotive_pictures/192750_EGRBPT93_240SXFig24_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_EGRBPT93_240SXFig25_1.jpg



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Friday, November 20th, 2009 AT 7:57 AM
Tiny
JUANFARIASC
  • MEMBER
I just did the vacuum test for the EGR valve, should it hold the pressure? Because my egr valve did and the spring in side the egr want up.
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Tuesday, January 12th, 2010 AT 3:34 PM
Tiny
KHLOW2008
  • EXPERT
Yes, the valve must hold vacumn. If is faulty if it cannot hold vacumn.
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Wednesday, January 13th, 2010 AT 7:15 AM
Tiny
JUANFARIASC
  • MEMBER
Does that also apply to the BPT valve?
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Wednesday, January 13th, 2010 AT 11:24 AM
Tiny
KHLOW2008
  • EXPERT
The BPT would not hold vacumn until pressure is applied to the port as indicated in the diagram.
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Wednesday, January 13th, 2010 AT 12:55 PM
Tiny
JUANFARIASC
  • MEMBER
1) when checking the vacuum on the egr and bpt, should the car be on?

2) the check engine light only turns on for a few seconds
(5 sec) and doesnt come on until the next day- is that normal or should it be on all the time? Maybe problem comes and goes?

3) it says to apply little pressure to the bottom of the bpt when testing the bpt- pressure in which way? Do I push up on it? Squeeze the horse a bit that is connected to it? Or?
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Thursday, January 14th, 2010 AT 8:39 AM
Tiny
KHLOW2008
  • EXPERT
1. Testing for vacumns requires the engine to be running. Using the vacumn to test the valvves is usually done with a hand vacumn pump.

2. The CEL would come on when the ignition switch is turned on and it will stay on for a few seconds after the engine is started. When no faults are detected, it would turn OFF. ONLY when there are any faults detected in the engine management system will the CEL stay on while the engine is running.

3. Apply pressure means using low air pressure to push the diaphragm. A hand pump would be the desired choice.
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Friday, January 15th, 2010 AT 7:37 AM

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