 96 Volvo 850glt A/c, A/C does not work... |
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| 96 Volvo 850glt A/c, A/C does not work... |
  Sep 5 2008, 08:55 PM
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#1
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Newbie Group: Members Posts: 4 Joined: 5-September 08 Member No.: 47,788 Status:  Location: usa Drives: 96 850 glt  |
When i purchased my car (96 850 GLT) the A/c worked, which was about 10 months ago... didnt try using it again until after winter, now it doesnt work, it can be a tiny bit cooler than outside air is, by a degree or two intermittently.
when i start the car the two red dots on the A/C and heater button blink for a minute or two... is this normal? whenever the heater or A/C is on there is a loud click in the engine every minute or so, kindof like the sound of a breaker from an electrical box when you turn it off or on. What could this be? could this be the problem? thanks alot for any help or advice sincerily, A man to fix his A/C just in time for winter :P |
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Sep 5 2008, 09:16 PM
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#2
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 Senior  Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
well, first of all, you must have warm winters! anyhow, the ac control box is going out. the blinking lights is showing faults in your control box. First off, recharge your ac system, the clicks you hear under the hood is the compressor. it has a clutch that ingages to "compress" the freon in your system, it helps to make it colder and without it, no ac at all. now, if you have access to a replacement ac/heat control box the you can take the box out of the dash, like a radio, matter of fact take the radio out, reach under the ac box, pull towards you, wala, its out, now look on the back of the box you should see the green connectors, unplug them, plug in the replacement box. go thru the motions with the controls, see ifyou get the same performance. some of the ac boxes go bad at times, they short out on the boards. simple replacement, about 50 to 75 dollars used, 165 to 350 new. :haha:
i had this issue last year, i ran without ac during a 100+ hot summer, then had to go without heat. but if you plugged in a good control box you could set the system on the desired temp and it would setup to run, then i plugged up the old one and used the good fan control. i know dumb move, but i had other intrest. just try that, and im goin to shut up now. :clap: good luck! :57: |
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Sep 5 2008, 09:40 PM
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#3
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Newbie Group: Members Posts: 4 Joined: 5-September 08 Member No.: 47,788 Status: Location: usa Drives: 96 850 glt |
awesome easy enough, thank you kind sir...
thanks again sincerily, A man to fix his A/C just in time for winter |
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Sep 5 2008, 10:37 PM
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#4
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Senior Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
glad to help! anytime! :57:
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Sep 6 2008, 06:53 AM
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#5
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 Full Member Group: Members Posts: 165 Joined: 20-February 08 Member No.: 38,678 Status: Location: USA Drives: 1995 Volvo 850 Wagon |
i found this text doc when is a trouble shooting my 850 A/C issue.
lots of info and diagnostics... good luck!
Attached File(s)
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Sep 6 2008, 01:29 PM
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#6
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Senior Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
that didnt say anything about the A/C control unit. yes, the ac is vac assisted, but, when that board burns out you will smell that sweet electrical fume, then you will not have complete control of the ac/heat. once the lights start to blink its a indication that the ac/heat will go into default, only producing defrost settings.SELF-DIAGNOSTICS
The Electronic Climate Control (ECC) control module can detect faults in the system and store Diagnostic Trouble Codes (DTCs). If a fault is present, system informs driver by flashing AC OFF and REC switch LEDs for 20 seconds. A fault warning is given when a fault is discovered or present each time ignition is turned on or engine started. DTCs will remain stored until cleared by an input code. NOTE: Test Unit (981 3190) and Adapter (981 3194) are required for DTC diagnosis. The Volvo Diagnostic Key (998 8670) may be used to perform self-diagnostics. Follow tool manufacturer’s instructions. There are 3 different test modes/settings which can be selected for reading off DTCs. TEST MODE 1 may be used for reading off DTCs detected by control unit (up to 47 codes can be stored). TEST MODE 2 checks signals from speedometer and solar sensor. TEST MODE 4 is used to check electrical circuits in A/C system, reset information on damper motor limit positions and change data transmission speed from ECC control module to on-board diagnostic unit. NOTE: Ignition must be turned off before switching from one test mode to another. ENTERING SELF-DIAGNOSTICS 1) Connect selector cable from diagnostic unit "A" to terminal No. 1 of diagnostic unit "B", located behind right headlight. See Fig. 2. 2) Turn ignition on. LED on diagnostic unit "A" should start flashing. Each DTC (3-digits) consists of a series of flashes with a short break between each series. DTCs are displayed in ascending order. See AUTOMATIC A/C-HEATER SYSTEM DIAGNOSTIC TROUBLE CODES table. Fig. 2: Identifying Diagnostic Units Courtesy of Volvo Cars of North America. AUTOMATIC A/C-HEATER SYSTEM DIAGNOSTIC TROUBLE CODES ���������������������������������������������������������������������������������������������������������������������������������� Code # Condition/Affected Circuit 1-1-1 ..................... No Fault Found By Diagnostic System 1-2-1 .......... Outside Temp. Sensor Circuit Shorted To Ground 1-2-2 .................................... Outside Temp. Sensor Circuit Open Or Shorted To Power 1-2-3 .... Driver’s Side Temp. Sensor Circuit Shorted To Ground 1-2-4 .............................. Driver’s Side Temp. Sensor Circuit Open Or Shorted To Power 1-2-5 ....... Pass. Side Temp. Sensor Circuit Shorted To Ground 1-2-6 ................................. Pass. Side Temp. Sensor Circuit Open Or Shorted To Power 1-3-1 ....... Driver’s Side Duct Temp. Sensor Shorted To Ground 1-3-2 ......................... Driver’s Side Duct Temp. Sensor Circuit Open Or Shorted To Power 1-3-3 .......... Pass. Side Duct Temp. Sensor Shorted To Ground 1-3-4 ............................ Pass. Side Duct Temp. Sensor Circuit Open Or Shorted To Power 1-3-5 ........................ No Engine Temp. Frequency Signal 1-4-1 ........ Driver’s Side Temp. Switch Faulty Control Signal 1-4-3 ........... Pass. Side Temp. Switch Faulty Control Signal 1-4-5 ........... Air Distribution Switch Faulty Control Signal 1-5-1 ..... Fan Speed Sensor Control Signal Missing Or Too High 1-5-2 ....... Fan Speed Sensor Control Signal Shorted to Ground 2-1-1 .............. Driver’s Side Damper Motor Position Sensor Circuit Open Or Shorted To Power 2-1-2 .............. Driver’s Side Damper Motor Position Sensor Shorted To Ground 2-2-1 ................. Pass. Side Damper Motor Position Sensor Circuit Open Or Shorted To Power 2-2-2 ................. Pass. Side Damper Motor Position Sensor Shorted To Ground 2-3-1 ................ Ventilation Damper Motor Position Sensor Circuit Open Or Shorted To Power 2-3-2 ................ Ventilation Damper Motor Position Sensor Shorted To Ground 2-3-3 .............. Floor/Defrost Damper Motor Position Sensor Circuit Open Or Short To Power 2-3-4 .............. Floor/Defrost Damper Motor Position Sensor Shorted To Ground 2-3-5 .............. Recirculation Damper Motor Position Sensor Circuit Open Or Short To Power 2-3-6 ..................... Recirculation Damper Motor Position Sensor Shorted To Ground 3-1-1 ... Driver’s Side Damper Motor Shorted To Ground Or Power 3-1-2 ...... Pass. Side Damper Motor Shorted To Ground Or Power 3-1-3 ..... Ventilation Damper Motor Shorted To Ground Or Power 3-1-4 ... Floor/Defrost Damper Motor Shorted To Ground Or Power 3-1-5 ... Recirculation Damper Motor Shorted To Ground Or Power 3-2-1 .............. Driver’s Side Damper Motor Active Too Long 3-2-2 ................. Pass. Side Damper Motor Active Too Long 3-2-3 ................ Ventilation Damper Motor Active Too Long 3-2-4 .............. Floor/Defrost Damper Motor Active Too Long 3-2-5 .............. Recirculation Damper Motor Active Too Long 4-1-1 ......... Pass. Compartment Fan Overcurrent Or Seized Fan 4-1-2 .............................. Driver’s Side Temp. Sensor Intake Fan Shorted To Ground 4-1-3 .............................. Driver’s Side Temp. Sensor Intake Fan, No Control Voltage 4-1-4 ............ Driver’s Side Temp. Sensor Intake Fan Seized 4-1-5 .... Pass. Side Temp. Sensor Intake Fan Shorted To Ground 4-1-6 .. Pass. Side Temp. Sensor Intake Fan, No Control Voltage 4-1-7 ............... Pass. Side Temp. Sensor Intake Fan Seized 4-1-8 .................... No Control Signal To ECC Power Stage 4-1-9 ....... ECC Power Stage Emitting Faulty Diagnostic Signal 4-2-0 ................ ECC Control Module Fault, Program Memory 5-1-1 ......................... Self-Adjustment Of Damper Motor Limit Positions Not Carried Out ���������������������������������������������������������������������������������������������������������������������������������� TEST MODE 1 1) Turn ignition on. Press button on diagnostic unit "A" for about one second. Read LED flashes. If LED does not illuminate, go to ON-BOARD DIAGNOSTIC UNIT CHECK under TESTING. 2) If LED flashes DTC 1-1-1, no faults are stored. If LED flashes other than DTC 1-1-1, display DTCs and perform appropriate DTC trouble shooting. To erase code, see ERASING CODES. TEST MODE 2 1) Turn ignition on. Press button on diagnostic unit "A" twice (for about one second each time). LED should start flashing rapidly once TEST MODE 2 is activated. If LED does not start flashing rapidly after button is pressed, go to ON-BOARD DIAGNOSTIC UNIT CHECK under TESTING. 2) If LED flashes DTC 1-1-2, signal from solar sensor is okay. If LED flashes DTC 1-1-3, signal from speedometer is okay. If neither DTC is present, go to next step. 3) If DTC 1-1-2 is not present, check solar sensor. Go to SOLAR SENSOR under TESTING. If DTC 1-1-3 is not present, check speed sensor signal. Go to SPEEDOMETER SIGNAL under TESTING. To exit TEST MODE 2, turn ignition off. TEST MODE 4 1) Turn ignition on. Press button on diagnostic unit "A" 4 times (for about one second each time). LED should illuminate. If LED illuminates, go to next step. If LED does not illuminate, go to ON-BOARD DIAGNOSTIC UNIT CHECK under TESTING. 2) Control codes must be entered one step at a time. See TEST MODE 4 CONTROL CODES table. LED should go off after each digit is entered. Entering each digit in a code must be made within 4 seconds, as failure to do so will abort input and TEST MODE 4 must be restarted. TEST MODE 4 CONTROL CODES C��o��d��e�� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� �� ��T��e��s��t�� 1-1-1 .............................. Controlling A/C Relay 3-1-1 ................................... (1) Normal Speed 3-1-2 ....................................... (1) X2 Speed 3-1-3 .................................. (1) (2) X10 Speed 9-9-9 ................................. Self-Adjustment Of Damper Motor Limit Positions (1) - Changes data transmission speed/rate from ECC control module to on-board diagnostic unit. (2) - Used only with Volvo Diagnostic Key (998 8670). ������������������������������������������������������������������������������������������������������������������������ Controlling A/C Relay Enter control code 1-1-1 by pressing button on diagnostic unit 3 times, with a short pause in between to allow LED to come on again. ECC control module will now switch A/C relay on and off 5 times (10 seconds on, 10 seconds off), switch A/C compressor on and off, and turn control panel A/C indicator on and off. If A/C relay does not respond as indicated, check A/C relay. See A/C RELAY CHECK under TESTING. Self-Adjustment Of Damper Motor Limit Positions 1) Turn ignition on. Place fan (blower motor) lever in manual mode. Turn function selector to AUT (automatic). Ensure system is in TEST MODE 4. 2) Enter control code 9-9-9 by pressing button on diagnostic unit 9 times in quick succession. Enter each of the 9 series 3 times, with a short pause in-between to allow LED to come on again. ECC control module is now ready to adjust damper motor limit positions automatically. 3) Wait about 10 seconds for fan to start. Turn ignition off to exit TEST MODE 4. Turn ignition on. AC OFF and REC indicator on A/C control panel should flash. Drive car for a few minutes at speeds greater than 20 MPH. 4) Stop car and turn engine off, but leave ignition on for at least 2 minutes to enable ECC control module to store all values. Start TEST MODE 1 and record DTCs. If DTC 1-1-1 appears, selfadjustment is complete. If DTC 5-1-1 appears, self-adjustment is not complete. Changing Data Transmission Speed/Rate From ECC Control Module To On-Board Diagnostic Unit Enter desired control code (3-1-1 or 3-1-2) by pressing button on diagnostic unit "A", with a short pause in-between to allow LED to come on again. System always starts at normal speed unless another option is selected. If another option was selected, system will revert to normal speed each time ignition is turned off. ERASING CODES 1) All codes must be displayed at least once before they can be erased. To erase codes, ensure selector cable is connected to terminal No. 1 of diagnostic unit "B". See Fig. 2. Press and hold diagnostic button for at least 5 seconds. LED should illuminate 3 seconds after button is released. 2) Press and hold diagnostic button for a minimum of 5 seconds more. When button is released, LED should go out. Ensure codes have been erased by pressing diagnostic button once. If display shows 1-1-1, codes have been erased/cleared. If a DTC will not erase/clear, perform that particular code’s diagnosis again. |
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Sep 6 2008, 01:32 PM
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#7
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Senior Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
now you see why i just told him to get a replacement box? :haha:
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