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 MANUALSFORD2004ECONOLINE E150, VAN CARGO, 4.6 WREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 313 (HVAC CONTROL SYSTEM)DIAGNOSIS AND TESTINGCLIMATE CONTROL SYSTEMCONNECTOR CIRCUIT REFERENCEEATC MODULE C228A / EMTC MODULE C294A
2004 Ford Econoline E150, Van Cargo, 4.6 W
EATC Module C228A / EMTC Module C294A
2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION EATC Module C228A / EMTC Module C294A
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
EATC MODULE C228A / EMTC MODULE C294A CONNECTOR CIRCUIT REFERENCE
| Pin Number(s) | Circuit Designation/Description | Normal Condition/Measurement |
|---|---|---|
| 1 | CKT 1203 (BK/LB) ground | Less than 5 ohms to chassis ground. |
| 3 | (EMTC single-zone only) CKT 1397 (GY/WH) EMTC module A/C request signal to SJB | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 5 | CKT 1977 (YE/BK) EATC/EMTC module reference voltage to mode door actuator | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 6 | CKT 245 (BN/LG) EATC/EMTC module to LH temperature blend door actuator motor drive A circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 7 | CKT 246 (VT) EATC/EMTC module to LH temperature blend door actuator motor drive B circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 8 | CKT 1991 (LB/WH) EATC/EMTC module to air inlet door actuator motor drive A circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 9 | CKT 1990 (WH/LB) EATC/EMTC module to air inlet door actuator motor drive B circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 14 | CKT 1003 (GY/YE) Ignition voltage | Greater than 10 volts with the ignition ON. |
| 15 | CKT 1978 (BN/LG) EATC/EMTC module return signal from mode door actuator | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 16 | CKT 1982 (LB/BK) EATC/EMTC module feedback signal from mode door actuator | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 17 | CKT 435 (TN/LB) EATC/EMTC (dual-zone) module feedback signal from RH temperature blend door actuator | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 18 | CKT 437 (YE/LG) EATC/EMTC module feedback signal from LH temperature blend door actuator | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 19 | CKT 1989 (OG/LB) EATC/EMTC module to mode door actuator motor drive A circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 20 | CKT 1988 (BN/OG) EATC/EMTC module to mode door actuator motor drive B circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 21 | CKT 436 (RD/LG) EATC/EMTC module reference voltage to temperature blend door actuator | Greater than 4.5 volts with the ignition ON and the EATC/EMTC in any position other than off. |
| 22 | CKT 438 (RD/WH) EATC/EMTC module signal ground to temperature blend door actuator | 0 ohms to chassis ground. |
| 23 | (EMTC only) CKT 1398 (PK/WH) Blower motor speed signal to SJB | Greater than 10 volts with the ignition ON. |
| 24 | CKT 1069 (OG/LB) EATC/EMTC (dual-zone) module to RH temperature blend door actuator motor drive A circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 25 | CKT 660 (YE/LG) EATC/EMTC (dual-zone) module to RH temperature blend door actuator motor drive B circuit | Greater than 10,000 ohms to chassis ground and 0 volts. |
| 26 | CKT 1001 (WH/YE) Battery voltage | Greater than 10 volts at all times. |
RENDER: 1.0x
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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.