Question about 1994 Toyota 4Runner

2 Answers

4runner will not idle

1994 Toyota 4runner will not idle; have to give gas to keep running; self test gave me "Code 42," Speed Sensor signal or ECU

Posted by on

  • Anonymous Mar 26, 2014

    toyota 4runner 1996 won't start when cold and won't keep idle. I've had this problem and nothing seem to fix it. New distributor, cam shaft sensor, new ECU, i hear the gaz pump. Yesterday it would'nt keep the idle and then the truck won't start after it die.

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Toyota Master
  • 358 Answers

Check your air idle control valve on the throttle body.

Posted on Jun 05, 2009

Ad
  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 49 Answers

IAC is sealed. I would double check distributor set or timing belt. Maybe your ignitor or coil lead.

Posted on Oct 11, 2014

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1994 prizm speedometer eratic tried 3 used clusters and replaced sensor New schematic shows ckt runs through ECM is this a possibility


automatic or stick shift car???????
prizm = toyota corolla, (vast parts to be had and books on same)
1994
what are the symptoms, not guessing I need all facts on symptoms.
lets see. 1.6L engine or 1.8L , sorry they are not the SAME>
so what engine is there?

fuses test good?
car drives perfectly, all other electrics run ok , all lighting ok.
bad cluster , well what is bad, tacho, speedo, odometer, gauges, warning lamps. what?
say all things in the cluster that work and not work.
then and only then can any one give good advice.
ill run with only speedo needle bounces,
most 90s cars love to do that, its a fact. (high miles)
if need speedo and dead odometer that is unique.
that is correct more modern cars, all deleted that speedo cable
long long ago and is now a 10cent wire from cluster to ECU.
as did yours.
since the ECU knows speed already why not let it do the job for free. and did.
end history class but, the odd duck cars exist.

first thing to do is learn that the cars ECU has flash codes
you jumper 2 pins on a DLC, and the ECU flashes the CEL lamp with codes, if the code for VSS is set BINGO transmission VSS is dead, or erratic. code 42 tells you VSS is bad. does it flash 42?

The ECU uses speed, to calculate load and fuel better , knowing this facts.

but in your case its 1/2 true, the odd duck, the toyota way in 1994
is to have the VSS sensor drive the cluster
and the cluster speed drives the ECU.
(have book in hand from mitchells online, so can you of you look)

V3 is bad, (or as in all electrics, (laws) wires./loose/bad, there.
VSS means veh. speed sensor
my guess is you will ask where is it, like all here do not wanting
to pop 15bucks to read at mitchels.
At 55 mph:= 48 Hz ( the signal speed on it) square wave.

where it is depends on auto or stickshift
but its FWD and this sensor in on the side with axle ring gear
i guess.
the 3 wire sensor with R-Y, R-G and R-L color wires is a BINGO.

vss-5okvwe4z4w3ktgpaujwqctz2-1-0.jpg

Mar 28, 2017 | 1994 Geo Prizm

1 Answer

Truck will be running fine, then all of a sudden it will completely shut off. After we wait a few minutes and pump the clutch and make sure it is all the way to the floor it will start, sometimes. S


You need the engine computer scanned for fault codes, i thank you have an ignition control problem like a module or distributor pickup coil issue. These parts whenthey fail should leave fault cdes so get them read.
Next, the check engine light will pause shortly followed by the second digit of the trouble code. For example if the check engine light blinks once and pauses followed by six blinks the trouble code number would be 16. If no code is present the check engine light will stay one constantly. To restart code gathering turn the ignition key to the "off" position, wait three minutes and turn the ignition key back "on" again without starting the engine. Remove the jumper wire once code gathering is complete. To clear code after the repairs have been made remove the negative battery cable for one minute and reconnect.
toyota_dianostic_connector.jpg
Toyota Diagnostic Connector
Toyota Code Definition Table
Code 11 Momentary interruption in power supply to ECU (electronic control unit or computer) up to 1991
Code 12 Engine revolution signal missing Code 13 Rpm signal to ecu missing above 1000 rpm
Code 14 Igniter signal to ecu missing
Code 16 A/T control signal missing from ecu
Code 21 Main oxygen sensor signal fault
Code 22 Water temperature sensor circuit fault
Code 23 and 24 Intake air temperature signal fault
Code 25 Air/fuel ratio LEAN
Code 26 Air/fuel ratio RICH
Code 27 Sub-oxygen sensor signal or heater circuit fault
Code 28 No. 2 oxygen sensor/heater signal fault
Code 31 and 32 Air flow meter circuit or Vacuum sensor signal fault Code 34 and 36 Turbo-charging pressure signal fault
Code 35 Altitude compensation sensor signal fault
Code 41 Throttle position circuit fault
Code 42 Vehicle speed sensor circuit
Code 43 No starter signal to the ecu
Code 51 AC signal on; DL contact off (in transmission shifter with diagnostic connector jumped)
Code 52, 53 and 55 Knock sensor fault Code 71 EGR system malfunction
Code 72 Fuel cut solenoid signal fault
Code 78 Fuel pump control signal fault
Code 81, 83, 84 and 85 TCM communication fault

Jun 28, 2012 | Cars & Trucks

2 Answers

Toyota 4runner 1994 engine codes 12,52,71 what are these


Code 12 Engine revolution signal missing
Code 52 Knock sensor fault
Code 71 EGR system malfunction

May 04, 2011 | Toyota 4Runner Cars & Trucks

1 Answer

I need a honda car code , i can't turn on my radio


service manual.
Code Description Possible Cause
0 ECU / ECU signal No signal to ECU
1 Oxygen sensor circuit Oxygen sensor or circuit, ECU
2 Oxygen sensor circuit Oxygen sensor or circuit, ECU
3 MAP sensor circuit Map sensor circuit
4 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
5 MAP sensor circuit MAP sensor or circuit, mechanical
problem
6 ECT sensor circuit ECT sensor or circuit, automatic
transaxle control unit
7 TPS / Angle Sensor TPS sensor or circuit, automatic
transaxle control unit
8 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
9 CMP sensor CMP sensor or circuit
10 IAT sensor IAT sensor or circuit
11 Idle Mixture Adjuster Sensor Idle mixture adjuster sensor or
circuit
12 EGR system fault No EGR action, faulty EGR valve
13 BARO sensor circuit BARO sensor or circuit
14 Idle Air Control valve circuit / ECU Open or shorted out ignition signal
circuit / No signal to ECU
15 Ignition Output signal Open or shorted ignition output
signal circuit
16 Fuel Injector Circuit Open or shorted fuel injector
circuit
17 VSS circuit VSS sensor or circuit
18 Ignition Timing Adjuster Open or shorted signal circuit
19 A/T Lock-up control solenoid Open or shorted signal circuit,
Lock-up control solenoid lock-up solenoid
20 Electrical Load Detector / Sensor Electrical load detector or circuit
Honda/Acura
Fault Code Definitions (21 - 59)
Chapter 3 22
Code Description Possible Cause
21 Spool Solenoid Valve Open or shorted signal circuit,
spool solenoid valve
22 Valve Timing Electronic Oil Open or shorted signal circuit,
pressure switch valve timing oil pressure switch
23 Knock sensor circuit Knock sensor or circuit
30 AT / ECU communication signal A AT control unit, ECU
31 AT / ECU communication signal B AT control unit, ECU
35 Traction control / ECU / signal Traction control module, ECU
36 Traction control / ECU / signal Traction control module, ECU
41 Oxygen sensor heater - left side Oxygen sensor / heater or circuit
42 Oxygen sensor heater - right side Oxygen sensor / heater or circuit
43 Fuel Supply system - left side Oxygen sensor or circuit, fuel
system
44 Fuel Supply system - right side Oxygen sensor or circuit, fuel
system
45 Fuel metering - left side Injector control circuit, incorrect
fuel metering
46 Fuel metering - right side Injector control circuit, incorrect
fuel metering
48 Heated oxygen sensor Oxygen sensor or circuit
53 Right Knock Sensor Right knock sensor or circuit
54 CKP sensor 2 CKP sensor 2 or circuit
59 CMP sensor 2 CMP sensor 2 or circuit

Dec 28, 2010 | 1994 Honda Accord

2 Answers

I have a 94 4runner and I ran the diagnostic and its a 42 code for the OD/off and engine 42. It doesn't shift into over drive sometimes and it'll blink OD/off every now and then, and the speedometer...


Hi,

Code #42 on the 4Runner denotes a problem with the Vehicle Speed Sensor (VSS) circuit.

It means the ECM did not detect a signal from the VSS, above 2,200rpm....which might explain the speedo issue - Does your speedo play up, only when engine running above 2,200rpm or 2,700rpm?

Areas to check (in this order) are:

- Open (or short) in the VSS circuit
- faulty VSS sensor
- ECM fault within VSS circuit


Cheers,

"If this has helped you, please rate this solution" :-)

Jan 27, 2010 | 1994 Toyota 4Runner

1 Answer

My 4runner has a slight hesitation while warming up.


You have several options that could be the problem. Check idle speed sensor, check tps sensor, I would suggest to get a diagnose from the E.C.U to find out that code you get. Good luck

Dec 29, 2009 | 1997 Toyota 4Runner

2 Answers

Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?


2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp sensor...open or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

Nov 09, 2009 | 1990 Jaguar XJ6

1 Answer

I have a 1994 Toyota 4Runner with a V6 and the check engine light came on i jumped the terminals and code 14 and 26 came up. what does the codes mean?


These are the codes and possible causes taken from http://www.off-road.com/toyota/tech/codes/
Code 14 :
IGNITION SIGNAL--NO "IGF" SIGNAL TO ECU
--IGNITER/IGNITER CIRCUIT
--IGNITER AND IGNITION COIL/CIRCUIT
--ECU

Code 26 :
AIR/FUEL RATIO RICH INDICATOR
--INJECTOR FAULT(S)
--FUEL PRESSURE
--OXYGEN SENSOR
--AIRFLOW METER OR MAP SENSOR
--IGNITION
--ECU
--COLD START INJECTOR

Sep 17, 2009 | 1994 Toyota 4Runner

1 Answer

1994 Toyota 4Runner V6 2.0 VZE Engine, Automatic, 4wd DTC trouble code 12 how do I troubleshoot this code?


that code is for rpm signal and possible causes are the distributor wire harness from dis. to ecu (engine computer) or ecm itself! do you have rpm tach working on the dash? if so it might have seen the fault for a few seconds and set the code if you don't have rmp tach then you need to diagnois the cuase by testing the signal out of the dis. then down the line! if you have any more question please ask. good luck

Sep 11, 2009 | 1994 Toyota 4Runner

1 Answer

Get code 16


code 16 is described as follows
rpm too low during self-test (lean fuel test)
or
idle speed control (ISC)
rpm out of self test specification
or
electronic distributorless ignition fault refers to a signal not recieved
or
exhaust gas oxygen sensor - signal voltage indicates rich during engine run self test

What i would check is the egr valve to see if it is stuck open. that would make it run like ****.
Does it idle ok or does it run rough. I mean without revving it with the pedal? Have also seen these melt exhaust valves.
So check that and let me know what you find.

Jul 04, 2008 | 1994 Ford Explorer Limited

Not finding what you are looking for?
1994 Toyota 4Runner Logo

Related Topics:

702 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8266 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...