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What is pcm mode in amps - Yamaha RX-V661 Receiver

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Pontiac grand prix 2007 car shutting off, with Start disabled throttle control module.


It doesn't say module , Starting Disabled Due To Electronic Throttle Control !
The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:
• Accelerator pedal position (APP) sensing
• Throttle positioning to meet driver and engine demands
• Throttle position sensing
• Internal diagnostics
• Cruise control functions
• Manage TAC electrical power consumption
The TAC system includes the following components:
• The APP sensors
• The throttle body assembly
• The powertrain control module (PCM)
Normal Mode
During the operation of the throttle actuator control (TAC) system, several modes or functions are considered normal. The following modes may be entered during normal operation:
• Minimum pedal value--At key-up, the powertrain control module (PCM) updates the learned minimum pedal value.
• Minimum throttle position (TP) values--At key-up, the PCM updates the learned minimum throttle position value. In order to learn the minimum throttle position value, the throttle blade is moved to the closed position.
• Ice break mode--If the throttle is not able to reach a predetermined minimum throttle position, the ice break mode is entered. During the ice break mode, the PCM commands the maximum pulse width several times to the throttle actuator motor in the closing direction.
• Battery saver mode--After a predetermined time without engine RPM, the PCM commands the battery saver mode. During the battery saver mode, the TAC module removes the voltage from the motor control circuits, which removes the current draw used to maintain the idle position and allows the throttle to return to the spring loaded default position.
Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control however the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the throttle, or by controlling the fuel and spark if the throttle is turned off.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.

DTC P2101
DTC P2107
DTC P2108
DTC P2119
DTC P2120
DTC P2125
DTC P2135
DTC P2138 You need to see which of these codes

Nov 16, 2016 | 2007 Pontiac Grand Prix

2 Answers

1996 Saturn sl2 radiator fan problem does not turn on changed fuse and relay and motor


Pull the plug off the temperature sensor. This throws the PCM in default mode. The fans should come on at high mode. If not look to wiring, fuses, relays and the PCM. Scanner helps a lot.

Aug 07, 2016 | Saturn Cars & Trucks

1 Answer

What would cause only 2.5 volts being supplied to TPS at the reference wire? What would cause oil light to come on and car going into limp-in mode after OBDll scanner was used.


The PCM supply's the five volt reference . Is there five volts at the PCM on that gray wire , T - pin that wire at the PCM connector . If no 5 volt ref. there PCM is bad ! Provided one of the other sensors on the 5 volt ref. circuit isn't pulling it down ! Check pin's 4 & 5 in the DLC connector ,these are ground circuits . One is sensor ground an other is body ground . Your vehicle has two 5 five ref. circuits A & B . What type scan tool did you use ? Your 5 volt ref. circuit inside the engine computer is shorted because of your code reader .

Jan 08, 2016 | 1997 Buick Park Avenue

2 Answers

I have a 1999 Alero 3.4 V6 the cooling fans won't run. I checked the fans they both work if I unplug the harness for the temp sensor,the relays and fuses are fine,I replaced the coolant temp sensor and...


CHECK MODE RELAY IF BOTH RELAYS GOOD YOU CAN CHECK RELAY BY REMOVING IT FROM FUSE BOX HOOK RELAY TERMINAL 85 TO BATTERY POSITIVE AND GROUND TERMINAL 86 IF CLICKS RELAY GOOD. IF RELAY GETTING POWER GOOD AND THE 30 AMP COOLING FAN FUSE OKAY.EITHER THERE IS A SHORT IN COOLING FAN WIRING OR THE PCM HAS FAILED.THE PCM HAS LOST OR COMMAND RUN CIRCUIT IN PCM SHORTED OUT DUE TO PCM FAILURE.LET DEALERSHIP OR GARAGE USE DIAGNOSTIC EQUIPMENT TO ACTIVATE THE PCM SEE IF IT HAS FAILED.DONT SPEND MONEY ON NEW PCM COULD BE SHORT IN THE WIRING CIRCUIT

Sep 06, 2011 | 1999 Oldsmobile Alero

1 Answer

05 lincoln ls was in accident, hit on drivers side, airbag deployed from drivers seat, seat belt light on, engine light on, wrench light comes on and goes into limp home mode. Was told needed to throttle...


I have a 2004 LS V8 & do all my own work

I can understand the battery failed as it was
more than 4 or 5 years old

The converters would have had to be damaged
in the accident if something got under the car
& damaged the exhaust pipes,no other reason

The Gas Pedal is called a Electronic Throttle
Control Module,I'm looking at my wiring diagrams
for a V6 &v8. I don't see that as an issue

The Throttle Body is almost always replaced at a dealer
& seldom an issue either. Reason --When you have a really
bad COP Ignition Coil it spikes your PCM & the signal
comes back on the TPS Sensor on the throttle body &
the pcm looses throttle plate % & starts to cut out
fuel injectors

Bottom line ,not many people like working on Ford Products
& the dealer will really cost you dearly & with negative results.

I have seen many codes related to coils & never more than
one bad one,while it could happen

It sounds as though 80% of your issues have nothing to do
with the accident.

We own one of the most complicated vehicles out there
It has Jaguar Technolgy as well

I don't know if any testing or diagnosing was done on your car
or if what was done invloved a body shop,then off the a dealer
or local repair shop,but I don't get a warm fuzzy fealing on anything
but the battery

As long as your wrench is light you have codes to at least look at

The ETC Failsafe on the right bottom side if dash is a BAD COIL
as I explained above. You will drive up to 22 miles in hot weather

The PCM you can see & feel under & behind the glove box
To remove it you have to remove the box on pass side of engine
compartment that covers the Cabin Filter as the 2 harness connectors
ar there down low

I doubt the PCM Failed

Go to a local shop that likes lincolns & just have them find
the one bad ignition coil.
them it will only go 6 mph in failsafe. Unusable for now

Jun 09, 2011 | 2005 Lincoln LS

1 Answer

Fail safe mode is on and car will not start.iwas told that i need a pcm


You have ETC Failsafe & Engine Temp Failsafe

Which do you have?

Nothing to do with PCM,who told you that,
and based on what type of testing ?

Mar 19, 2011 | 2005 Lincoln LS

1 Answer

9@how to fix dtc p1178 and p1118 on a 2002 hyundai xg350


I live in Australia & have a Hyundai Grandeur XG 3LT V6 2002 model (US equivalent is Hyundai XG300).
Fault codes are P1118 (ETS motor fault) & P1178 (ETS motor battery voltage open). An intermittent fault.
The first code denotes general area of the fault & the second code denotes the specific fault.
So the specific fault is that the ETS-PCM computer is not receiving 12V on pin 2 with ignition on.
'Check engine' light remains on & car is in 'limp home mode' with very little power & poor performance.
I had purchased the Hyundai service manual online (ebook about $8) for the US model. Could not find any
manual for the Australian model. On page FLA-52 found the block diagram for the whole ETS system.
I am a retired electrical engineer so now it became easier for me to find the fault.
There are 2 computers behind the center console. PCM & ETS-PCM.
Pin 2 of the ETS-PCM should have 12V present when ignition is on.
In fault mode 12V was not present. This 12V is supplied from ETS 15A fuse (fuse box under dashboard)
via a relay (i will call this relay the ETS relay). The 15A fuse was OK but the 12V was only
intermittently being passed through the relay points. Relay is located near ignition switch on a
sub panel which has about 6 relays on it. ETS relay was at right bottom corner of sub panel.
Yellow wire feeds the 12V (which is always present even with ign. switch off) to the relay points.
White wire is the output wire from the relay points which feeds 12V to pin 2 of the ETS-PCM computer.
Measure if 12V is present at white wire when ign. switch is turned on (no need to start engine)
I only had the 12V present intermittently. So pulled out the ETS relay - tested contacts with
ohmmeter & found to be only making contact intermittently when relay lever depressed
- removed relay case by grinding away one corner of the case - cleaned the relay points with fine sandpaper.
replaced the relay case & taped with black insulating tape to keep out dust. Tested relay with ohmmeter & points
now OK. Fault is now cleared & car is operating normally.
Also had previously purchased on Ebay a Can OBD11 scanner for $15 which read the fault codes OK.
Hope this helps other people with similar problem.

Mar 15, 2011 | Hyundai Motor 2003 XG350

1 Answer

How do i stop the amp frombeing in pcm


At the bottom of the reciever, there is a button labeled STANDARD MODE. Press it and the reciever says PCM. Two buttons to the left is a button marked AUTO/ACL/DIRECT push that a few times and you'll have other options.

Jan 03, 2011 | Pioneer VSX920 71 Channels Receiver

1 Answer

My gearbox is stuck in 2nd gear even if you put it into 3 or L & engine light is stuck on & cant remove it?


the pcm prolly has picked up a problem with the transaxle, pcm puts the transaxle in "limp mode" which will keep it n 2nd or 3rd depending on the programing try checking the codes to see if it has speed sensor or solonoid failure codes. clear them, n c how long it takes to come back

Mar 20, 2010 | 2004 Chrysler Voyager

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