20 Most Recent 1997 GMC Jimmy - Page 2 Questions & Answers

Sound like an Ecu I had a similar problem on a Vauxhall Corsa changed the fuel pump, Fuel filter, fuel pump relay but same prob i cleaned all the grounding points there was so many codes. I then opened up the ECU and found a broken wire re soldered it back in place and all the codes went away no cutting off in the midst of a roundabout hope this helps

There are two basic reasons for not starting - no spark or no fuel, both of which are controlled by the ECM. You need to check error codes and these items - for the spark, test it at the cylinder 1 sparkplug; for the fuel check the pressure (if too high or low, problem!).

verify throttle position sensor voltage off idle. oscilloscope is best. on regulur voltmeter use min max

Your trouble description fits the symptoms of a transmission solenoid problem. Find more information here: Transmission Solenoid Symptoms Replacement Cost

Have no clue as to what you want ? Like to try an explain a little better . What do DTC'S 740 , 785 and 1860 have to do with key in ignition chimes . Plus i'am assuming the DTC'S you have listed all start with P - P0740 , P0785 and P1860 . DTC P0740 TCC Enable Solenoid Circuit Electrical (2.2L) DTC P0740 TCC Enable Solenoid Circuit Electrical (4.3L) DTC P0785 3-2 Shift Solenoid Circuit Electrical (2.2L) DTC P0785 3-2 Shift Solenoid Circuit Electrical (4.3L) DTC P1860 TCC PWM Solenoid Circuit Electrical (2.2L) DTC P1860 TCC PWM Solenoid Circuit Electrical (4.3L) None of these have anything to do with warning chimes . Key-In Warning Buzzer Voltage is supplied at all times to the truck BCM through the following components: • The underhood bussed electrical center (UBEC) fuse 4 • CKT 1140 (ORN) The chime or buzzer sounds if the following conditions exist: • The key is in the ignition switch • The vehicle is not running. • The left door is open. When the door is open, the LF door jamb switch closes to ground. This provides a ground to the truck BCM through the following components: • CKT 126 (TAN) • The left front side door jamb switch • CKT 1050 (BLK) • SP203 • C203, cavity F12 • G203 The chime or the buzzer will sound for as long as the door is open and the key is in the ignition switch. Turn the ignition switch to the OFF position. Remove the key from the ignition. Using the scan tool, enter BCM Data List. Select Input 1. Does the KEY IN IGNITION test display NO? 3 Turn the ignition switch to the OFF position. Remove the key from the ignition. Using the scan tool, enter BCM Data List. Select Input 1. Does the KEY IN IGNITION test display NO? -- Go to Step 4 Go to Step 8 4 Turn the ignition switch to the OFF position. Remove the key from the ignition. Move the headlamp switch to the OFF position. Using the scan tool, enter BCM Data List. Select Input 2. Does the PARKLAMPS test display OFF? -- Go to Step 5 Go to Step 9 5 Inspect the connections at the BCM. Are the connections in need of repair? -- Go to Step 6 Go to Step 7 6 Repair the connections as necessary. Is the repair complete? -- Go to Diagnostic System Check - Audible Warnings -- 7 Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Is the repair complete? -- Go to Diagnostic System Check - Audible Warnings -- 8 Locate and repair the short to ground in CKT 80 between the BCM connector C2 terminal B9 and the key in ignition alarm switch. Is the repair complete? -- Go to Diagnostic System Check - Audible Warnings -- 9 Are the park lamps ON with the switch OFF? -- Go to Exterior Lights System Check in Lighting Systems Go to Step 5 Your best bet take to a qualified repair shop

Try formulating the question better as you are jumping from 2009 to 2010 for a year later then asking for an answer 7 years after

the abs control unit controls the speedo (tach) also tells the cruise signal. abs should be fixed or replaced for any of these to work properly with the abs system not working you have no signal to the ecu to say what fuel air mix is for the speed you are doing and will think you are idling.

there are a few possible things. easiest to hardest, check your spark plugs for wear and gap. if its not the plugs it could be water in fuel system freezing. in colder enviorments it is always best to get highest octane fuel available because it contains less water. try adding an octane booster or fuel stabalizer when fueling up. also fuel filter may be at the end of its lifespan, it would take more cranking to suck the fuel through it if it is clogged.

You may have a axle bearing going out. You should jack the truck up and rock the wheel from top to bottom and see how much play is there and there should not be any rock. You could or should compare the rock from one side to the other side as a comparison. Just be aware you can get noise that travels along the frame in some cases and it is hard to determine just where it is coming from.

The first thing you need to do is have the engine computer control module scanned for fault codes. Autozone and O'reilly auto parts do this for free. Ask for a OBD2 fault code test.

There are approx. 50 to 100 Fuses and circuit protectors on a vehicle. They are spread over the vehicle based on cost to manufacture. What fuse are you speaking of? Lights, Radio, Alternator, ECU? There should be a kick plate on the side of the floorboard on one side with a fuse label on it, or under the dash, in the glove box and usually one under the hood. A black box near the battery. Some vehicles tell you the fuse identification, others you have to look it up online or owners manual.

Boy that sure looks like the steering column harness that hooks up to your multifunction switch, ends up to the left of the steering column underneath the dash.

Driver side under the hood, fuse positions on the underside of the fuse box lid

Excluding drl and fog lamps, there is no relay. The voltage to headlamp switch, hot all the time, I didn't check for fusible links? The voltage from headlamp switch goes to dimmer switch then to headlamps, at the headlamps check voltage and ground. My info showed sealed beam or quad lamps, I didn't look at both.

No regular fuse for headlamps , fusible link .Do you know what a fusible link is ? There is a headlamp switch , dimmer switch , no relay . Go http://www.bbbind.com/free_tsb.html free wiring diagrams ! Check it out yourself , an check for B+ voltage with a DVOM - digital volt ohm meter at the headlamp switch , if B+ voltage is present there check at dimmer switch . There are videos on youtube for basic automotive electrical testing . Do you know how to read a wiring diagram ? Videos on youtube for that as well .

I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure. Best Manuals

Are you having more than one issue? With engine cranking, if no fuel pump, no fuel injector pulse--and no spark at the plugs, I usually check for missing rpm signal. These system may operate a little differently depending on year-- make and model.What is your year--make--model?As far as checking fuses, your owners manual should tell you what fuses for fuel pump and or fuel pump relay and where fuses are located. Your fuel pump needs voltage and ground. If you want me to post a wiring diagram, I need year--make--model, only vehicles sold in the US.Click on the comment link for diagram. The gray wire carries voltage to fuel pump, when relay is energized. You see the ecm bat fuse, not only check the fuse, check the fuse circuit for voltage, hot all the time.

check fuses and relays ----re check your fuses and relays as well as battery block and ground straps if all good will need a meter to back trace and search for possible wire short or melted wiring in harness