Is the PCM - engine computer controlling ( turning on ) the coils ? What engine ? 2.2 or 3.5 l Videos on youtube on crankshaft position sensor testing . Does the vehicle have a Tach , when cranking engine does it move ? If not could be a bad crank sensor . If the PCM doesn't see an input from the crank sensor it won't turn on the coils
Call GM customer service and let them know what is going on. Also, you can try another dealer who will add a fresh "eye" to the situation. Keep good records to make sure it's known that your problem existed and was not repaired before the waranty ran out. Good luck Simple code check will show MAP sensor & other systems stored faults
if i had to guess i would say you have a shorted wire in the harness. this may be the problem or it could be a bad switch or relay also. trying to tell you what it is from is going to be really hard unless someone else with the same problem figured it out and is willing to tell what he did. i have a mustang 2002 and took the dirvers door wire harness out of the car and found two wires that been cut from inside the door on what i don't know. my door lock didn't work and my power mirror didn't work. at least your remote still works so you know the lock is getting power but something is bad some where and acting as a toggle swtich and that can be from to wires touching each other when you hit a bump in the road for example.
check wiring going to door there is a black rubber boot going to door wires have rubbed to a short. roll windows up and down if locks start working thats the door to check If one of your door locks don t work, check wiring
First clean your ejector give a trier if problem persists then change the fuel filter if it is clogged up. If the filter is clogged up then your fuel tank is light lying to be dirty, hence you may bring it down for cleanup. The last thing to do if there others failed then it could be the fuel pump is very weak and need to be replaced.
Do you know how these thing's work ? How to do automotive electrical testing using a DVOM - digital volt ohm meter ? How to look up wiring diagrams to see what is involved in the working's of these systems ?
The R-BEC 1 fuse in the underhood fuse block supplies battery positive voltage to the BACKUP LAMP relay through the BACKUP LAMP fuse. When the gear selector is placed in reverse, the body control module (BCM) supplies ground to the BACKUP LAMP relay. This energizes the BACKUP LAMP relay and current flows from the BACKUP LAMP relay to the backup lamps and then to ground. The backup lamps are grounded at G401 and G403.
The transmission range (TR) switch is part of the park/neutral position (PNP) and back-up lamp switch assembly (1), which is externally mounted on the transmission manual shaft. The TR switch contains four internal switches that indicate the transmission gear range selector lever position. The PCM supplies ignition voltage to each switch circuit. By grounding one or more of the switch circuits, the PCM detects the selected gear range by the state change of the switch input. Refer to Transmission Range Switch Logic . Switch input to the PCM is represented on the scan tool as HI and LOW. HI indicates an ignition voltage signal. LOW indicates a zero voltage signal. The four parameters represent transmission range switch signal A,B,C and Parity.
When the transmission is placed into reverse a input to the engine computer is received . The PCM - engine computer sends a massage on the C.A.N serial data network to the BCM - body control module . Which then energizes the back up lamps relay .
Same with the Door locks , controlled by the BCM .
Door Lock System Components
The Power Door Lock System consists of the following components:
• Body control module (BCM)
• Driver door lock switch
• Front passenger door lock switch
• Door lock actuators in each of the doors
• IBCM (PWR) 15-amp fuse
Door Lock System Controls
The Power Door Lock System is controlled by the body control module (BCM) and can be activated by any one of the following:
• A door lock switch Lock or Unlock actuation
• A keyless entry transmitter actuation
• An automatic door lock actuation
• An automatic door unlock actuation
• A last door closed locking (LDCL) actuation
A/C only works on 3,4 . we assume you mean the blower motor only works on med speed an high speed . This would be for the heat as well . Manual or automatic cilmate control ? The blower motor control module is probably at fault !