Where are the PCM connectors located? - 1995 Jeep Cherokee

Do you know where the connector at the EGR valve is ? Has five wires . Pin C - brown wire is Pintle position signal to the PCM - engine computer . Do you know where the PCM is located on the vehicle ? Connector 2 pin 65 at the PCM is the other end of that circuit. The PCM supply's a 5 volt ref. voltage to the EGR at pin D gray wire . Sensor ground pin B - black wire . Connector 1 pin 58 at the PCM . Videos on youtube on how to test .

The PCM is located just next to the 16 pin OBD2 diagnostic connector under the driver's side dash. The PCM is perpendicular to the firewall with the electrical connector facing downward.

POWERTRAIN CONTROL MODULE (PCM)

The Powertrain Control Module (PCM) is located in the engine compartment. The PCM is referred to as
JTEC (Jeep/Truck Engine Controller), exactly on the passenger side of the firewall, aft of the coolant reservoir. You will have to remove the reservoir. The PCM is a square metal box mounted vertically to the firewall with three bolts. On the front, you will find three large rectangular connectors, one black, one white, one gray. Beneath the two outer connectors, you will find the two screws. You do not need to remove the connectors.

Hope this helps (remember to rate this free answer).

DTC P1166: A/F Sensor (Sensor 1) Heater Circuit Malfunction

1. Reset the ECM/PCM.
2. Start the engine.

Is DTC P1166 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at C101 (located under the right side of the dash), C401 (located under the left side of the dash), C402 (located under under the left side of the dash) the A/F Sensor relay, the A/F Sensor (Sensor 1) and the ECM/PCM.

1. Check the following fuse:

• No.14 OPTION (30A) fuse in under-hood fuse/relay box.
• No.2+B LAF HEATER (20A) fuse in under-dash fuse/relay box.
• No. 4ACG (10A) in under-dash fuse/relay box.

Are any of the fuses blown?

YES - Repair short in the wire between the A/F Sensor relay and the fuses.

NO - Go to step 4.

1. Measure voltage between ECM/PCM connector terminals A1 and A24, 30 seconds after the ignition switch is turned ON (II).

Is there battery voltage?

YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.

NO - Go to step 5.

1. Measure voltage between ECM/PCM connector terminals A22 and A24.

Is there battery voltage?

YES - Go to step 6.

NO - Go to step 10.

1. Turn the ignition switch OFF.
2. Disconnect ECM/PCM connector E (31P).
3. Turn the ignition switch ON (II).

1. Connect ECM/PCM connector terminal E8 to body ground with a jumper wire, then measure voltage between ECM/PCM connector terminals A1 and A24.

Is there battery voltage?

YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.

NO - Repair open or short in the wire between the A/F Sensor (Sensor 1) and ECM/PCM (A1).

1. Turn the ignition switch OFF.
2. Disconnect the ECM/PCM connector A (31P) and the A/F Sensor (Sensor 1) 4P connector.

1. Check for continuity between the A/F Sensor (Sensor 1) 4P connector terminal No.3 and body ground.

Is there continuity?

YES - Repair short in the wire between the A/F Sensor relay, A/F Sensor (Sensor 1) and ECM/PCM (A22).

NO - Go to step 13.

1. Turn the ignition switch ON (II).

1. Measure voltage between ECM/PCM connector terminals E8 and A24.

Is there battery voltage?

YES - Repair open in the wire between the ECM/PCM (A22) and the A/F Sensor (Sensor 1).

NO - Go to step 15.

1. Check for continuity in the wires between the A/F Sensor and the fuses.

Is there continuity?

YES - The wires are OK. Replace the A/F Sensor relay.

NO Repair open in the wire between the A/F Sensor relay and the fuses.

remove the connectors from your pcm and see if they have corrosion in them. the pcm is located on the firewall on the passenger side.if it has corrosion you need to clean the connectors and pcm with a soft brush and put dielectric grease in the connectors and pcm.hope this helps.

You have to disengage the PCM (computer) wiring harness from the PCM as the PCM is removed from under the dash. The PCM connector is located on the firewall under the hood to the left of the brake booster, you'll see the a large retangular wiring connector (120 wires) with a single bolt in the middle. Unscrew the bolt, go back under the dash to remove the PCM.

1998 Ford Truck Expedition 4WD 5.4L EFI 8cyl

PCM Ford's Location:
* Ranger - behind instrument panel (cowl), center to both driver and passenger sides.
* Explorer/Mountaineer - behind instrument panel (cowl), (access from engine compartment dash panel) on passenger side to center of vehicle.
* All other F-Series, Expedition/Navigator - lower dash panel on passenger side.
* Excursion - lower dash panel on driver side.

The PCM is behind the glove box and has a big harness connector in the firewall that you access from the engine compartment.

REMOVAL & INSTALLATION



Fig. 1 The calibration number will be needed to order such parts as a replacement PCM, various sensors, and almost any emission control component. Typically this number is attached to a label found on the driver's door or the door pillar


1997-00 F-150, F-250, Expedition and Navigator



Fig. 2 Loosen the connector retaining bolt and remove the PCM connector



Fig. 3 Remove the passenger side front door scuff plate



Fig. 4 Remove the passenger side kick panel



Fig. 5 Remove the PCM bracket clip and remove the PCM

1. Remove the battery and the battery tray.
2. Loosen the connector retaining bolt and remove the PCM connector.
3. Remove the passenger side front door scuff plate.
4. Remove the passenger side kick panel.
5. Remove the PCM bracket clip.
6. Remove the PCM.
   

To install:

1. Installation is the reverse of removal.
2. Tighten the PCM connector retaining bolt to 36-44 inch lbs. (4-5 Nm).

Hope helps.

It is located in the Passenger Compartment(inside vehicle), Lower RH Front Corner





REMOVE OR DISCONNECT

• Disable Supplemental Inflatable Restraint (SIR) system.

1. Powertrain Control Module (PCM) connectors.
2. PCM.

• Pull bottom of PCM rearward over locking tabs and downward to remove.

INSTALL OR CONNECT

1. PCM into bracket, making sure PCM is up over locking tabs and locks into place.
2. PCM connectors.

• Enable SIR system.

The numbers are on the PCM not the plug.

behind glove box

They seldom go bad so don't change until you know for sure. What are symptoms?

for villager/quest help go here

http://autos.groups.yahoo.com/group/villagerquest/
Powertrain Control Module (PCM) CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result. Refer to Module Servicing Precautions in Section 18-01 .
Removal

1. Disconnect the battery ground cable (14301).
   

1. Remove the four console compartment plastic screws or C/D changer cover plastic screws (if equipped) and the console compartment door (045G36) or C/D changer cover.
   

1. Remove the plastic screw, two lower screws, two center bolts, two upper screws and the screw at the instrument panel bracket, then separate the glove compartment from the instrument panel (04320). Disconnect the glove compartment striker plate catch electrical connector.
   
2. Remove the two passenger side air bag module bracket nuts, the passenger side air bag module bracket bolt and the passenger side air bag module bracket.
   

1. Remove the powertrain control module (PCM) electrical connector bolt. Pull the connector from the PCM and position aside.
   
   
   
   
   Remove the two PCM bolts.
   
   
   
   
2. Remove the PCM relay.
   
   
3. Remove the three electrical connectors attached to the PCM.
   
4. Remove the PCM from the instrument panel.