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I'm trying to find a fault in the O2 sensor wiring to my ECU. Vehicle is a '97 Saab 900 MT with 2.3L non turbo.
Anybody have a wiring diagram that they'd be able to email? I'd like to confirm terminal pin input to the ECU without peeling back the entire wiring harness.
Haynes is showing terminal 28 but wire colors to the ECU plug do not seem to match colors at the O2 sensor plug receptacle on the wiring harness.
Thanks... Posted 08th April/20.
 

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Black wire from O2 sensor goes to Pin #4 on connector to a Green wire (pin 28) at computer..
Grey/White wire is power to O2 heater delivered through fuel pump relay by way of fuse #38 to pin#1.
Pin 2 goes to ground on J29
 
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