PCM Connector A-B (Red)

POWERTRAIN CONTROL MODULE (PCM) VOLTAGE CHART
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.

CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."

NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.

POWERTRAIN CONTROL MODULE (PCM) VOLTAGE CHART
This PCM voltage chart is for use with a digital voltmeter to further aid in diagnosis. The voltages you get may vary due to low battery charge or other reasons, but they should be very close. The B+ symbol indicates a nominal system voltage of 12-14 volts.

CONDITIONS FOR TESTING
^ Engine at operating temperature (upper radiator hose hot).
^ Engine idling in "Closed Loop" (for "Engine Run" column) in park or neutral.
^ Test terminal not grounded.
^ Scan tool not installed.
^ Accessories "OFF."

NOTE: Before checking voltages, be sure PCM and engine grounds are clean and tight.

CHART LEGEND
(1) B+ for first two seconds.

(2) Varies.

* Less than 0.5 volts (500 mV).

** If equipped.

NOTICE: Before "Closed Loop" operation can occur the following must take place:

^ Engine coolant temperature above 29°C (84°F).
^ Heated Oxygen Sensor (HO2S) voltage varying.
^ Engine RPM greater than 800 for 15 consecutive seconds after 1 and 2 have occurred.

RED 32 PIN CONNECTOR

32 Pin A-B Connector (RED):

RED 32 Pin A-B Connector # 1: