No.1 UNABLE TO COMMUNICATE WITH GENERIC ELECTRONIC MODULE (GEM)[GEM]

id0902h9826000

STEP	INSPECTION		ACTION
1	INSPECT FOR OPEN BATTERY SUPPLY CIRCUIT Turn the ignition switch off. Disconnect the GEM connector. Measure the voltage at the following GEM terminals (harness-side). •  1B •  2Z Is the voltage more than 10 V?	Yes	Go to the next step.
		No	Repair or replace the wiring harness. Clear the DTC. Repeat the self-test.
2	INSPECT FOR OPEN POWER SUPPLY CIRCUIT Turn the ignition switch off. Turn the ignition switch to the ON position. Measure the voltage at the following GEM terminals (harness-side). •  1A Is the voltage more than 10 V?	Yes	Go to the next step.
		No	Repair or replace the wiring harness. Clear the DTC. Repeat the self-test.
3	INSPECT FOR OPEN POWER SUPPLY CIRCUIT Turn the ignition switch off. Turn the ignition switch to the ON position. Measure the voltage at the following GEM terminals (harness-side). •  1D Is the voltage more than 10 V?	Yes	Go to the next step.
		No	Repair or replace the wiring harness. Clear the DTC. Repeat the self-test.
4	INSPECT FOR OPEN GROUND CIRCUIT Turn the ignition switch off. Inspect for continuity between the following GEM terminal (harness-side) and ground. •  1C Is the resistance less than 5 ohms?	Yes	Go to the next step.
		No	Repair or replace the wiring harness. Inspect the system for normal operation.
5	INSPECT FOR OPEN GROUND CIRCUIT Inspect for continuity between the following GEM terminal (harness-side) and ground. •  2W Is the resistance less than 5 ohms?	Yes	(See SYMPTOM TROUBLESHOOTING CHART[MULTIPLEX COMMUNICATION SYSTEM (AJ (3.0L Duratec))])
		No	Repair or replace the wiring harness. Clear the DTC. Repeat the self-test.