740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
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Fig. 172 E.G.R. VACUUM BOOSTER CHECKING
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Switch off ignition.
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Measure resistance between terminals 6 and 15 on control unit connector. Fig. 172.
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If resistance is approx. 85 ohms, (+/- 10 ohms) converter circuit and wiring are intact.
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Repeat test with another control unit.
If resistance is different:
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Check vacuum booster wiring and connections. Measure vacuum booster resistance at vacuum booster connector. Repair or replace as required.
