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Sir could you advise me the location of ecm-b power relay control and sense circuit relay for a 2001 chevy blazer s10

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The ecm A and B fuses are located in the underhood fuse/relay panel

Posted on Apr 05, 2015

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My 2013 dodge avenger wont start. Im getting a p0688 ECM/PCM code. What should I do


P0688 (generic) = ECM/PCM Power Relay Sense Circuit /Open
P0688 DODGE - Auto Shutdown Relay Control Circuit Low

Check all the ECM fuses, if the fuses are OK try replacing the ASD (Auto Shut Down) relay.

Read more: http://www.autocodes.com/p0688_dodge.html#ixzz405J7vpq8

Possible causes:

- Weak battery - Low voltage while cranking
- Faulty Engine Control Module (ECM) relay
- Blown ECM fuse
- Faulty ECM
- ECM harness is open or shorted
- ECM circuit poor electrical connection

Feb 13, 2016 | Dodge Cars & Trucks

1 Answer

What fuse is used to power the heater motor in a 1999 chevy blazer 4 x 4 s10?


It may not be a fuse, but instead a relay (30amp) located in the fuse block INSIDE the engine compartment, not inside the vehicle interior.
Relays go bad too though.

Nov 30, 2014 | 1999 Chevrolet Blazer

1 Answer

Wiring diagram 94 chevy s10


ECM b powers the fuel pump relay, the engine computer, and other components.
You could try pulling the pump relay to see if the short is in the fuel pump circuit. Otherwise, you may need a shop manual to find out everything in that circuit.

Sep 03, 2013 | Chevrolet Cars & Trucks

2 Answers

Where is the ECM located on a 92 S10


The ECM on a 1992 S10 and S10 Blazer is located below the glove box.

Jun 12, 2012 | Cars & Trucks

2 Answers

I have on 01 xterra-service engine light on-codes P1126 & P0325. I think the battery is about to go,could it be realated to codes? Otherwise what do the codes mean? Appreciate any help


Your battery has nothing to do with these codes. Your vehicles computers have detected a malfunction or failure in the system. This triggers these codes and sets your check engine light. Below I have listed the code meanings and some repair solutions.

P1126 - Throttle Position (Narrow Range) Sensor Circuit Malfunction.

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.

Possible Causes For P1126:
- Harness or connectors (Throttle control motor relay circuit is open)
- Throttle control motor relay


P0325 - Knock Sensor Circuit Malfunction

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Powertrain Control Module (PCM) or Electronic Control Module (ECM).

Possible Causes For P0325:
- Knock sensor circuit short to ground.
- Knock sensor circuit short to power.
- Knock sensor circuit open.
- Damaged knock sensor.
- Damaged PCM or ECM

Possible Solutions:
- Repair or resecure harness or connector
- Replace knock sensor Bank 1 (Bank 1 if applicable)
- Replace PCM or ECM

The P0325 DTC is a very common problem with Nissan vehicles. On most Nissan vehicles the knock sensor is located on top of the engine block.

knock_sensor_infiniti.gif

Jan 20, 2011 | 2001 Nissan Xterra

1 Answer

1997 chevy s10 blazerdash wont light up when key


the dash sound's like a fuse, check the fuse box under the hood and in the door jamb on the side of the dash, also check your fuel filter and fuel pump, im betting on the pump because i have a 2001 chevy blazer that has had two replaced and it has 233000km on it!

Jun 04, 2010 | 1997 Chevrolet Blazer

1 Answer

Head lights want come on my 2001 chevy blazer S10


Check headlight fuses and relays.Two locations possible.End of dash on Dr.side and relays maybe under the hood to thr rear of batterie on Dr.side.

Feb 05, 2010 | 2001 Chevrolet Blazer

1 Answer

I need fuse diagram for 2002 chevy blazer im trying to find fuse for fuel pump


Look in the fuse box under the hood. Find fuse "ECM B" which is on circuit 120 which excites the fuel pump relay. This is the fuse you want to inspect. The relay pin next to it is controlled by the PCM. The other 2 pins on the relay control the pump and the other the prime circuit.

Sep 03, 2009 | 2002 Chevrolet Blazer

1 Answer

89-98 chevy blazer


It's not worth doing all that conversion, buy the time you spend the time and money to convert the 89 4.3 to work on the 98 blazer, it would be cheaper to install a 98 vortec rebuild. The 89 4.3 have a TBI fuel injection system and the ecm on the 98 will not work and the bad news is that the ecm on the 98 also controls the transmission shift points and the 89 will not, so even if you swap the ecm to have the 89 4.3 engine work. the transmission will not shift. Sorry for the bad news but it would be cheaper to replace the 98 engine with the years of 1996 to 2001. Good luck and hope this helps. 

Jul 21, 2009 | 1989 Chevrolet S-10 Blazer

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