| + | |
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| + | === Update (09/29/2017) === |
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| + | |
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| + | From teh repair CD on how to test the fan: |
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| + | 4.6L, OBD-II: |
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| + | |
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| + | X240 ELECTRIC COOLING FAN CONCERN: DID THE FAN OPERATE AT ANY SPEED? |
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| + | |
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| + | Note: For the proper results of these pinpoint tests, no fault DTCs must have been present during EEC-V Quick Test. |
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| + | |
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| + | For one speed fan applications (Mustang), GO directly to X241 . |
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| + | |
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| + | During the operational check of both fan speeds, did the fan operate at any speed? |
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| + | |
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| + | Yes |
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| + | Only one fan speed is operational. GO to X250 . |
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| + | |
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| + | No |
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| + | Cooling fan will not operate at any speed. GO to X241 . |
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| + | |
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| + | X241 COOLING FAN WILL NOT OPERATE AT ANY SPEED: COMMAND FAN ON (HIGH SPEED FOR TWO SPEED APPLICATIONS) AND CHECK FOR VOLTAGE AT FAN |
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| + | |
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| + | Scan Tool connected. |
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| + | Key on, engine off. |
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| + | Still in Output Test Mode, with fan commanded off. |
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| + | Disconnect cooling fan (either one for Windstar). |
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| + | Command fan on (high speed for two speed fan applications). |
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| + | |
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| + | Measure voltage between the Power-To-(High Speed) Fan circuit at the cooling fan vehicle harness connector and chassis ground. |
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| + | Key off. |
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| + | |
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| + | Was voltage greater than 10.0 volts? |
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| + | |
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| + | Yes |
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| + | Power is being supplied to fan. GO to X245 . |
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| + | |
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| + | No |
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| + | GO to X242 . |
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| + | |
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| + | X242 CHECK FOR B(+) TO FAN RELAYS IN CCRM |
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| + | |
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| + | Key off. |
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| + | Cooling fan disconnected. |
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| + | Disconnect CCRM. |
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| + | Connect negative probe of DVOM to the battery negative post. |
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| + | |
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| + | For Mustang, Thunderbird/Cougar: |
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| + | Check voltage at pins 3 and 4 of the CCRM vehicle harness connector. |
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| + | |
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| + | For Continental: |
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| + | Check voltage at pins 3, 4, 8 and 10 of the CCRM vehicle harness connector. |
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| + | |
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| + | For Windstar: |
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| + | Check voltage at pins 1, 2, 6, 7, 12 and 24 of the CCRM vehicle harness connector. |
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| + | |
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| + | Is each voltage greater than 10.0 volts? |
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| + | |
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| + | Yes |
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| + | GO to X243 . |
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| + | |
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| + | No |
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| + | B(+) fault. CHECK condition of related fuses/fuse links. If OK, SERVICE open circuit. If fuse/fuse link is damaged, CHECK B(+) circuit for short to ground before replacing. |
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| + | |
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| + | For Continental: |
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| + | If open was to only CCRM pins 3 and 4, after service, GO to X272 (to check both HFC relays in CCRM and Power-To-Fan circuit). Otherwise, RECONNECT all components. RE-EVALUATE symptom. |
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| + | |
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| + | For Windstar: |
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| + | If open was only to CCRM pins 1, 2, 6 and 7, after service, GO to X272 (to check both HFC relays in CCRM and Power-To-Fan circuit). Otherwise, RECONNECT all components. RE-EVALUATE symptom. |
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| + | |
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| + | All others: |
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| + | RECONNECT all components. RE-EVALUATE symptom. |
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| + | |
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| + | X243 CHECK POWER-TO-FAN(S) CIRCUIT CONTINUITY BETWEEN CCRM AND COOLING FAN(S) |
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| + | |
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| + | Key off. |
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| + | CCRM disconnected. |
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| + | Cooling fan disconnected. |
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| + | |
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| + | For Mustang: |
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| + | Measure resistance between pin 2 of the CCRM vehicle harness connector and the Power-To-Fan circuit at the fan vehicle harness connector. |
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| + | |
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| + | For Thunderbird/Cougar: |
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| + | Measure resistance between pin 6 of the CCRM vehicle harness connector and the Power-To-High Fan circuit at the fan vehicle harness connector. |
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| + | Measure resistance between Pin 2 of the CCRM vehicle harness connector and the Power-To-Low circuit at the fan vehicle harness connector. |
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| + | |
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| + | For Continental: |
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| + | Measure resistance between the Power-To-High Fan circuit at the fan vehicle harness connector and Pins 2 and 12 of the CCRM vehicle harness connector. |
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| + | Measure resistance between Pin 6 of the CCRM vehicle harness connector and the Power-To-Low Fan circuit at the fan vehicle harness connector. |
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| + | |
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| + | For Windstar: |
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| + | Measure resistance between the Power-To-Fan circuit at the fan vehicle harness connector and Pins 4 and 8 of the CCRM vehicle harness connector. |
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| + | |
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| + | Is each resistance less than 5.0 ohms? |
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| + | |
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| + | Yes |
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| + | REPLACE CCRM. RECONNECT all components. RE-EVALUATE symptom. |
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| + | |
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| + | No |
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| + | SERVICE open Power-To-Fan circuits(s). |
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| + | |
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| + | For Continental: |
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| + | After service, GO to X273 (to check both HFC relays in CCRM). |
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| + | |
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| + | For Windstar: |
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| + | If open was just between CCRM Pin 4 and the fan, after service GO to X273 (to check both HFC relays in CCRM). Otherwise, RECONNECT all components and RE-EVALUATE symptom. |
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| + | |
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| + | All others: |
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| + | RECONNECT all components and RE-EVALUATE symptom. |
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