ECM - Terminal Voltage Update
Number 87-6 (Gasoline)-50 Date 7/87Subject: ECM TERMINAL VOLTAGE
1987 6000 AND GRAND AM MODELS WITH 2.5L L4 ENGINES (VIN CODES R AND U)
Page 6E2-A-6 of the 1987 6000 and Grand Am Service Manual contains an error. The voltage reading at Pin B9 (Ignition Ref. Hi) should be about:
Key "On" = 4.5V
Eng. Run = 3.0V
Please make note of this on the page referenced above.