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No Start - Power Stage - Testing & Connector Pin Voltages 700 1989

uid 30890's pic
posted by  dnvolvo on  Wed Jan 4 15:20 CST 2006
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last visit: Wed Jun 16 03:19 CST 2010
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89 760T - No Start Condition. Bosch EZK Ignition. No Spark from coil when grounding HT wire. Test light on (-) coil terminal produces steady light and does not flash (no ground impulses) when cranking engine.

Coil has good voltage on both LT terminals with key on. Coil LT and HT resistance checks within spec.

Power stage connector term 2 (ground) and terms 1 & 4 (battery with key on) measure good. Terminal 5 measures 0.0-0.5 Volts (while cranking engine) with a digital multimeter. Volvo Problem Solver indicates term 5 should be oscillating between approximately 0.8-1.2 Volts.

Per Solver, if voltage is oscillating and coil does not fire, power stage is bad. If not oscillating, check hall sensor.

My question is does anyone have experience with measuring term 5 on the Power Stage connector? In other words, would 0.0-0.5V (with digital multimeter) be considered within normal range and enough to trigger the power stage?

Thanks
--
dnvolvo 89 765T 200k - 91 245 100k






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New No Start - Power Stage - Testing & Connector Pin Voltages [700][1989]
posted by  dnvolvo  on Wed Jan 4 15:20 CST 2006 >


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