94' Volvo 850 OBD1 A3 ABS & B1 Climate Control Port Codes

Baptiste1106 · Post by **Baptiste1106** » 02 Sep 2014, 20:36

Read my OBD1 port and got

B1 Climate Control. I replaced a brand new blower fan and nothing when i move slider.

122 Outside temperature sensor open circuit or shorted to 12 volts
411 Blower fan seized or drawing excessive current
414 Driver’s side interior temperature sensor inlet fan seized
418 No control signal to blower fan power stage

A3 ABS (abs light on dash). Can't find the definitions for all the others. What a summer i enjoyed w/o A/C

312
213
214
141
142
144
122 Right front wheel sensor

Post by **Ozark Lee** » 02 Sep 2014, 20:44

Clear all of the codes and see what comes back. The biggie is port B-1, code 4-1-8. That is normally indicative that the power stage (blower resistor) is bad. Code 4-1-1 is a precursor to code 4-1-8 in most cases since the MOSFET in the power stage can only deal with a limited current sink amperage before it either opens or shorts out.

The 1-2-2 and the 4-1-4 won't cause the AC to not work, it just may not make great decisions in the AUT mode.

...Lee

Baptiste1106 · Post by **Baptiste1106** » 02 Sep 2014, 21:07

@ Ozark Lee... Whats AUT mode ? I cleared the ABS codes and the codes in the post is what come back. Any suggestion on the ABS ? What to replace, what to check, how to check ? Thanks again

Post by **Ozark Lee** » 03 Sep 2014, 09:11

The AUT mode is the automatic mode on the center switch and the blower switch. It puts the system into auto pilot and it varies fan speed and directs air flow how it thinks it should be done. I rarely use it since I prefer to direct the air where I want it to go rather than where the computer in the ECC thinks it should go.

You have nearly every ABS code in the book and I doubt that they are all still valid errors. The ABS unit stores all codes that it has ever had until they are cleared manually. If you clear them and see what comes back after you drive the car it should narrow things down to one or two things that need attention.

...Lee

Post by **esl_97_850_T5** » 05 Sep 2014, 10:18

Baptiste1106

The ABS codes are presumably the same as can be found in the ABS/TRACS DTCs TABLE in "anti lock brake system and traction control.pdf" in the 1995 Volvo 850 .zip download.

esl_97_850_T5