Codes P1521 P1402 - Mazda Forum
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post #1 of 17 (permalink) Old 05-29-2005, 08:55 PM Thread Starter
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Does anyone know where the " Variable Intake Solenoid #1 Circuit Malfunction" is located at? I assume there are two solenoids for the intake runners. Are they both located ontop of the intake manifold? Anyone have an experience with this code?

Also whats the most likly fix for code P1402? Should I take the TB off and clean those intake ports?
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post #2 of 17 (permalink) Old 05-30-2005, 03:50 PM Thread Starter
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Quote:
Originally posted by Yel-low@May 29 2005, 07:55 PM
Does anyone know where the " Variable Intake Solenoid #1 Circuit Malfunction" is located at? I assume there are two solenoids for the intake runners. Are they both located ontop of the intake manifold? Anyone have an experience with this code?

Also whats the most likly fix for code P1402? Should I take the TB off and clean those intake ports?
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Any suggestions?? About to pull the TB off but I have no clue what to do about that solenoid problem.
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post #3 of 17 (permalink) Old 05-30-2005, 05:01 PM
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niether or those codes are in my book so I don't know. I doubt there on top though. Is this an L or an S
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post #4 of 17 (permalink) Old 05-30-2005, 08:47 PM
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i pulled the throttle body off and cleaned the EGR ports, which fixed my EGR problem, but i had a p0400 code so i dont know if it would help you.

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post #5 of 17 (permalink) Old 05-31-2005, 03:51 AM Thread Starter
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Quote:
Originally posted by 9milly7@May 30 2005, 07:47 PM
i pulled the throttle body off and cleaned the EGR ports, which fixed my EGR problem, but i had a p0400 code so i dont know if it would help you.
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It's a 1995 L. I didn't get to the egr today. I am just going to start pulling all solenoids and cleaning contacts and see if that helps. Both codes were pulled by an OBDII scan tool. Really trying to stay away from the dealship at all costs.
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post #6 of 17 (permalink) Old 05-31-2005, 10:16 PM
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P1402: Input voltage from EGR valve position sensor is below 0.2 V or above 4.8 V when ignition switch is turned on.

Causes:

- EGR valve position sensor malfunction
- Open or short circuit in wiring from EGR valve postion sensor terminal

Steps for repair include doing exactly what you're doing now, which is cleaning and inspecting the harness and connectors. If that's not the cause, I'd try at least cleaning the EGR valve with solvent or swapping it with a working one. You can test yours with a meter.

You should have 2700 ohms between terminals A and B on the EGR-VPS. 500 ohms between A and C. 2400 ohms between B and C.

To go further...

Disconnect EGR-VPS and check for 5V at terminal B with ignition on. There should be continuity with this terminal and ECU terminal 3I.

There should be continuity between terminal C on the EGR-VPS and ECM terminal 3J. There should be 0.8V on these terminals.

There should be continuity between terminal A on the EGR-VPS and ECM terminal 3O. There should be 0.0V on these terminals.
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post #7 of 17 (permalink) Old 06-01-2005, 01:12 PM Thread Starter
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Milly, thanks so much for the very helpfull info. I do not know what pins locations are where on the harness but I will start with cleaning and then progress from there. Thank you very much.

As for the 1502 I still am dumbfounded. Some OBDII scan tools have it listed some don't. Its listed as some solenoid when I looked it up on the forum.

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post #8 of 17 (permalink) Old 06-03-2005, 01:40 AM
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OBDII codes with the format P1XXX are proprietary Mazda so many universal readers won't recognize them. Codes with a '0' (P0XXX) are OBDII generic codes.

Hope this helps:

EGR-VPS

ECM

P1521





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post #9 of 17 (permalink) Old 06-03-2005, 06:25 AM
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post #10 of 17 (permalink) Old 06-03-2005, 12:58 PM Thread Starter
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My god!! Milly your are a life saver. Thank you once again for coming through with that info. If there is anything I can do to repay let me know. I'm printing this post out and heading straight out to the car.



Quote:
Originally posted by excluesiveonez@Jun 3 2005, 05:25 AM
WOW* good **** man
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