DTC P1166 Primary O2 heater circuit-ECU PIN DIAGRAM NEEDED?

jongearparts · Post by **jongearparts** » Sat Mar 11, 2006 12:47 pm

Have not had a problem in the last 4 months and I get a cell last night for a primary o2 heater circuit, checked at the connector by the exhaust, everything looks good mechanically. I want to check the resistance and a voltage drop from the ecu to the connector @ o2. I need the ecu pin diagram and which of the four wires at the o2 sensor is the heater circuit feed. Im assuming its a 5voltage signal to heat the o2? thanks in advance.

Post by **Spunkster** » Mon Mar 13, 2006 11:10 am

The O2 heater is 12v. You could have either a bad ground, or the O2 sensor has just died.

jongearparts · Post by **jongearparts** » Mon Mar 13, 2006 7:52 pm

do you know the pinout diagrams for the ecu side or at least the pin for the heater circuit, also the wire on the o2 would help. thanks

Post by **Spunkster** » Tue Mar 14, 2006 10:27 am

Go to Help, Contents, then look in Reference inside the K-MAnager software.