Originally Posted by PJP71

So did either of you resolve this issue? A friend of mine has the same problem. TIA

Originally Posted by Amusement

I'll save you the grief, 89452-35020 is NOT a substitute for 89452-35030.
Details; 2001 4Runner with 3.4 V6, automatic, 4x4.

Here's my write up @yotatech from July 25 after hours of playing with throttle positioning sensor. 2001 4runner Throttle position sensor 89452-35030 - YotaTech Forums

Originally Posted by capubu

For anybody looking for TPS 89452-35030 4 pin, you can get them at Discount Auto Parts Online -- PartsGeek.com - Domestic & Import Car Parts Warehouse they are about $ 65.00 OEM made by Aisan in Japan.
I had an iddle problem with my 2002 4Runner, Installed this part and now the iddle is just perfect

Originally Posted by capubu

For anybody looking for TPS 89452-35030 4 pin, you can get them at Discount Auto Parts Online -- PartsGeek.com - Domestic & Import Car Parts Warehouse they are about $ 65.00 OEM made by Aisan in Japan.
I had an iddle problem with my 2002 4Runner, Installed this part and now the iddle is just perfect

Originally Posted by stir_fry_boy

Hi everyone,

Just thought I could compile some useful information about the 01-02 Throttle Position Sensor based on my recent experience.

First off, the 01-02 TPS is different from the 96-00 year models when equipped with TRAC and VSC. The 01-02 uses a drive-by-wire with a throttle position sensor (APPS) near the gas pedal and the actual TPS on the back side closest to the firewall of the throttle body. There are lots of reasons to suspect a bad throttle position sensor. Some include P0121 code, vehicle hesitation, transmission shifting issues, etc.

If you suspect a bad TPS, here are your options for replacement:
1) Call the dealership and they will sell you part # 89452-35020 which is a 3 pin connector. The 01-02 with VSC and TRAC uses a 4 pin connector. Obviously that won't work. When searching by your VIN, the dealer's computer can't come up with a TPS. You have to replace the ENTIRE throttle body which is $1400!!

2) Every aftermarket option cross references to Toyota part #89452-35020 and are all a 3 pin connector. So, no aftermarket option is available.

3) Looking at the original throttle body, note the part number on the original TPS of #89452-35030. Cross referencing that part number will lead you nowhere fast. The dealer shows that's not a good part number, same with all the aftermarket parts sellers.

Now what do you do? Still no viable options so far.

3) Search car-part.com for a used throttle body, they go for around $250.

4) Search alibaba.com for part number #89452-35030 and that will yield results from sellers in China, with a minimum order of 5 TPS units costing between $9-$30 each. Are they Chinese made or Toyota OEM? I have no clue.

5) Suggested action: call Toyota customer care at 1-800-331-4331 and report that the part number you were initially given was incorrect, and that in order to replace a $50 sensor you have to spend $1400. The more people that call, the more Toyota will look into the issue. I am going to call.

6) When discussing possible part number options, one did come up from some sellers on Alibaba.com specializing in Japanese vehicle sensors. So far, I can't see anyone who has tried this. Part # 89452-22080. Cross referencing that part number on Toyodiy.com says it will fit the 01-02 4Runner with frame models VZN18x (our US frame models). Looking at images of that part number online yields a 4 pin connector! This could be a solution as a TPS is just a potentiometer.

Just thought I would help out other people looking for possible fixes of a bad TPS on the 01-02 4Runners. The same options apply for the 01-04 Tacomas, which make you wonder why Toyota has not addressed this issue given the quantity of vehicles in this range on the road.

Originally Posted by Amusement

Purchased a new throttle body and things didn't go well after a week.

VSC Off and Trac lights lit up along with engine light. P1125 code.

There's a sour spot 1/3 pedal.
VSC relays click away during hestitation.

Exploring the idea of blue tooth ODB II device and data log to see if the TPS voltage is a problem, or ECM or ECM connector.

Originally Posted by DHope

Did you ever get your problem resolved? All my sensors have the resistance the should. I am not sure how to test to see if the ecm is the problem. I am thinking the ecm or a new throttle body?