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Has anyone got a pinout chart for Toyota 1TR-FE engine management system?

The Throtle control system has failed on my HiAce 2004. I suspect a power supply to the ECM

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  • Toyota Master
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Run the fault codes first as it may be other sensors that are at fault ( throttle position sensor /throttle position motor)

Posted on Nov 10, 2014

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  • Roger Gallagher Nov 10, 2014

    Thanks Bill. Yes I have checked the codes. It shows only one being P2118. This refers to abnormal current to the throttle control motor. This will show up if the motor circuit is under extra load or if there is an open circuit in the power supply or eatrh to the ECM. I have examined the motor and tested it running. This may be the ultimate failure but I suspect there is a power supply missing. Some toyota throttle circuits show a dedicated supply via a 15A fuse. I cant find this circuit on my vehicle. I have substituted the ECM but not the throttle body.

  • Bill Boyd Nov 10, 2014

    code p2118 refers to throttle actuator control (TAC), throttle motor current--range/performance problem===causes wiring--throttle motor

  • Bill Boyd Nov 10, 2014

    The throttle motor will be controlled by the ECM but ultimately the ECM gets its settings from the accelerator position sensor. Where you place the accelerator pedal will be the current that the ECM will set the TAC at. ECM units seldom fail unless there is power surges or finger fault.

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Whats the codes p0685 an p0688 on a 2004 chrysler pacifica mean


P0685 CHRYSLER - Auto Shutdown Relay Control Circuit Failure

Short or open in Auto Shutdown (ASD) relay circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted
- Failed Auto Shutdown relay
- Failed ECM
Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

P0688 CHRYSLER - Auto Shutdown Relay Control Circuit Low

The Front Control Module (FCM) has detected the supply voltage below an acceptable value
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- ASD relay circuit is open or shorted
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- Failed ECM
Tech Notes
Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

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I have a the check code p0507 on my car Nissan altima coupe. Can someone help me with this


code p0507 refers to idle sped control (ISC) system--rpm higher than expected==causes --wiring--isc actuator--iac valve--throttle motor--throtle valve tight/sticking--ECM
it also refers to idle air control (IAC) system --circuit low==causes--wiring short to ground--IAC valve--ECM

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2 Answers

P0022 for 2004 toyota sienna van


P0022 Toyota - Camshaft Position \'A\' Timing Over-Retarded Bank 2



























Possible causes




- Dirty Oil

- Faulty variable valve timing (VVT)

- Faulty oil control valve (OCV)

- Variable Valve Timing (VVT) harness is open or shorted

- Oil Control Valve (OCV) circuit is open or shorted

- Damaged Engine Control Module (ECM)




Tech notes



If the engine oil is clean and the VVT and OCV circuits are OK, replaced the VVT to resolve the problem.





When is the code detected?


After the ECM sends the target duty cycle signal to the OCV, the ECM monitors the OCV current to establish an actual duty cycle. The ECM determines the existence of a malfunction and sets the DTC when the actual duty cycle ratio varies from the target duty cycle ratio.


Possible symptoms


- Engine Light ON (or Service Engine Soon Warning Light)

- Lack/Loss of power

- Engine rough idle


P0022 Toyota Description


The Engine Control Module (ECM) controls the Oil Control Valve (OCV) to regulate the intake camshaft angle. As a result of the angle change, the engine timing is advance or retard. Optimizing engine timing will help the engine improve torque and fuel economy, and the exhaust emissions decrease under overall driving conditions. The Variable Valve Timing (VVT) system includes the Oil Control Valve (OCV) and VVT controller. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control.

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1 Answer

Toyota hiace powervan fault code p1229 keeps showing any cures


P1229 - Toyota Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled Description Engine control module (ECM) - sensor supply voltage low/high
Cause Wiring, APP sensor, throttle motor position sensor, MAF sensor, fuel tank pressure sensor, TP sensor(s), refrigerant pressure sensor

or you can ask the 24 hrs live technical support Multi Diag, they will like to help you, good luck

Jul 04, 2013 | Cars & Trucks

1 Answer

Alfa 156 2lt JTS fault codes P0120 & P0505 are they an easy fix?


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2 Answers

2004 Isuzu Rodeo, Cruise Control will not switch on.


No fuses? In the dash fuse box, check 15A STOP LIGHT fuse CB-6, 15A ENGINE IG fuse CB-12, and 15A BACK-UP/TURN LIGHT fuse CB-14. Then, in the fuse/relay box, check 30A ECM fuse EB-17. The steering wheel switches connect through the SRS coil assembly which may have failed. The ECM may have failed. The vehicle speed sensor may have failed. Other elements of this circuit may have failed

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Ford crown victoria 2004 w/158194miles. DTC B1249.blend door failed or short


Is there ground?

Is there power and ground at the actuator?

Is there power or ground in the circuit when the system is off but the vehicle is running (Indicating a short to power or ground)

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1 Answer

TROUBLE CODES 605 AND 700


Is this P0605 and P0700? If so read on.
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Possible causes- ECM/PCM Harness power supply circuit is open or shorted
- ECM/PCM Harness ground supply circuit is open or shorted
- ECM/PCM may be faulty
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Possible causes- Shorted or open circuit within transmission control module (TCM)
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Tech notes Since the P0700 is just and informative code, check the TCM for more codes to resolve the problem

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2 Answers

Diagnostic code for my 2007 saturn ion says p0480 cooling fan 1 control circuit malfunction. what does this mean.


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