My buddy dropped off his 1999, 4.0 auto XJ for a no start for me to look at.
Cranks but does not start.
Turning the key i notice the volt gauge on the dash and the check engine light does not come on.
I look at the ASD relay and it and the fuel pump relay are not clicking.
All fuses check out good.
I go the PCM and back probe A22 on the black plug and it's got battery power, A31/32 both have ground.
I pull the connector to visually inspect, all looks ok, no loose pins on the PCM, no corrosion that I see.
While plugging it back in, I accidently left the key on, the relays all went nuts. The ASD and/or fuel pump started rapidly clicking like they do when they are low on voltage, but if I wiggled the plug just, not seated all the way into the retainer, the the ASD and fuel pump relay worked, the fuel pump primed, and pin A2 on the PCM had power, the volt gauge on the dash started working (The fuel gauge did not, not sure if it did before however). The check engine light now comes on with the key and I am able to pull codes.
p0113 - TPS
p0123 ECT
p0118 IAC
p1492 - Battery temp
None of those really meant anything to me for a no start, but I am a Ford tech, not a Jeep tech.
I put a noid light on the fuel injector, it is not pulsing/ no signal.
I did not check for spark, it was late...
Not really sure where to go from here.
I will check to see if those sensors are getting 5v reference.
See if fuel injectors are getting power.
See if the coil has power?
Any other ideas?
Does the CPS take away spark or fuel pulse?
If it was a Ford computer I could open it up and look for the brown stains, but I can't .
If feels like a PCM issue, but I want to be sure before I tell him to get that repaired, the whole not seating the connector all the way is strange, but I will clean it all tonight.
Cranks but does not start.
Turning the key i notice the volt gauge on the dash and the check engine light does not come on.
I look at the ASD relay and it and the fuel pump relay are not clicking.
All fuses check out good.
I go the PCM and back probe A22 on the black plug and it's got battery power, A31/32 both have ground.
I pull the connector to visually inspect, all looks ok, no loose pins on the PCM, no corrosion that I see.
While plugging it back in, I accidently left the key on, the relays all went nuts. The ASD and/or fuel pump started rapidly clicking like they do when they are low on voltage, but if I wiggled the plug just, not seated all the way into the retainer, the the ASD and fuel pump relay worked, the fuel pump primed, and pin A2 on the PCM had power, the volt gauge on the dash started working (The fuel gauge did not, not sure if it did before however). The check engine light now comes on with the key and I am able to pull codes.
p0113 - TPS
p0123 ECT
p0118 IAC
p1492 - Battery temp
None of those really meant anything to me for a no start, but I am a Ford tech, not a Jeep tech.
I put a noid light on the fuel injector, it is not pulsing/ no signal.
I did not check for spark, it was late...
Not really sure where to go from here.
I will check to see if those sensors are getting 5v reference.
See if fuel injectors are getting power.
See if the coil has power?
Any other ideas?
Does the CPS take away spark or fuel pulse?
If it was a Ford computer I could open it up and look for the brown stains, but I can't .
If feels like a PCM issue, but I want to be sure before I tell him to get that repaired, the whole not seating the connector all the way is strange, but I will clean it all tonight.