Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004FOCUS ZX5, 2.3 Z, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - THEORY & OPERATION - CNG, FLEX-FUEL & GASOLINEPOWERTRAIN CONTROL HARDWAREPOWERTRAIN CONTROL MODULEPCM LOCATIONS
2004 Ford Focus ZX5, 2.3 Z, Standard
PCM Locations
2004 Ford Focus ZX5, 2.3 Z, StandardSECTION PCM Locations
NOTE:
For PCM Removal and Installation procedures refer to the appropriate ELECTRONIC ENGINE CONTROLS
.
- Focus - passenger side behind kick panel.
- Taurus/Sable, Freestar/Monterey - behind glove compartment (access from engine compartment dash panel) on passenger side.
- Mustang - behind kick panel cover on passenger side, near instrument panel.
- Crown Victoria/Grand Marquis, Marauder, Town Car - behind instrument panel (cowl), driver side near brake pedal.
- LS6/LS8, Thunderbird, Explorer/Mountaineer, Aviator- passenger side, near side cowl, behind glove compartment.
- Escape, Explorer Sport Trac, Ranger - behind instrument panel (cowl), center to both driver and passenger sides (Access from engine compartment).
- Expedition/Navigator, F150 (Non-Heritage) - passenger side of engine compartment, mounted to the cowl.
- F-Series Heritage - lower dash panel on passenger side.
- Excursion, F -Series Super Duty - lower dash panel on driver side.
- E-Series - lower dash panel (cowl) on driver side (Access from engine compartment).
104-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | 71,97 |
| PWRGND | Power ground | 3,24,51,76,77,103 |
| CSEGND | Case ground | 25 |
| SIGRTN | Signal return | 91 |
| VREF | 5V reference | 90 |
| KAPWR | Keep alive power | 55 |
122-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B34 |
| VPWR | Voltage input to module | B46 |
| PWRGND | Power ground | B1 |
| PWRGND | Power ground | B11 |
| PWRGND | Power ground | B23 |
| CSEGND | Case ground | B10 |
| SIGRTN | Connector B signal return | B33 |
| SIGRTN | Connector E signal return | E25 |
| SIGRTN | Connector T signal return | T27 |
| VREF | Connector B Buffered 5V reference | B45 |
| VREF | Connector E Buffered 5V reference | E36 |
| KAPWR | Keep alive power | B40 |
150-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B32 |
| VPWR | Voltage input to module | B33 |
| PWRGND | Power ground | B24 |
| PWRGND | Power ground | B25 |
| PWRGND | Power ground | B26 |
| PWRGND | Power ground | B27 |
| CSEGND | Case ground | B43 |
| SIGRTN | Connector B signal return | B17 (B5 for LS6/LS8/ Thunderbird) |
| SIGRTN | Connector T signal return | T17 (T14 for LS6/LS8/ Thunderbird) |
| SIGRTN | Connector E signal return | E17 |
| VREF | Connector B Buffered 5V reference | B20 (B55 for LS6/LS8/ Thunderbird) |
| VREF | Connector E Buffered 5V reference | E20 (E14 for LS6/LS8/ Thunderbird) |
| KAPWR | Keep alive power | B44 |
150-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B35 |
| VPWR | Voltage input to module | B36 |
| PWRGND | Power ground | B47 |
| PWRGND | Power ground | B48 |
| PWRGND | Power ground | B49 |
| CSEGND | Case ground | B10 |
| SIGRTN | Connector B signal return | B41 |
| SIGRTN | Connector T signal return | T41 |
| SIGRTN | Connector E signal return | E41 |
| VREF | Connector B Buffered 5V reference | B40 |
| VREF | Connector E Buffered 5V reference | E40 |
| KAPWR | Keep alive power | B45 |
190-PIN PCM POWER AND GROUNDS
| Function | Description | Connector/Pin |
|---|---|---|
| VPWR | Voltage input to module | B51 |
| VPWR | Voltage input to module | B52 |
| VPWR | Voltage input to module | B53 |
| PWRGND | Power ground | B67 |
| PWRGND | Power ground | B68 |
| PWRGND | Power ground | B69 |
| PWRGND | Power ground | B70 |
| CSEGND | Case ground | B66 |
| SIGRTN | Connector B signal return | B58 |
| SIGRTN | Connector T signal return | T43 |
| SIGRTN | Connector E signal return | E58 |
| VREF | Connector B Buffered 5V reference | B29 |
| VREF | Connector E Buffered 5V reference | E57 |
| KAPWR | Keep alive power | B54 |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.