which wires do i need to wire up and where....i tried to just plug in everything (compressor, drier, ac controls)but the ecu still does not see when the A/C is on....i just don't want to connect a positive somewhere and fry my ecu
ECU Back-up Power Fuel Injector # 2 Fuel Injector # 4 AAC Solenoid Sensor Ground Exhaust Gas Tempereature Sensor (Y/L) Cooling Fan Relay (Condenser) A/C Relay A/T Control Unit Pin #12 Sensor Ground Clock (Sync Signal) CLK, A/T Pin # 29, HICAS (Y/Pu) CLK Data Link Connector For Nissan Consult Check Engine Light (MIL) SCV Solenoid Knock/ Detonation Sensor A/T Control Unt Pin # 34 Sensor Ground, A/T Control Unit Pin # 35 Cam Angle Sensor 180 Degree Signal Cam Angle Sensor 1 Degree Signal Thermistor Control Amplifier (A/C) 4th Gear Switch, A/T Control Unit Pin # 10 (Br/Y) Power Steering Oil Preesure Switch Rear Defogger Switch, A/T Control Unit Pin # 11 (G/O) Ambient Switch > G > B > FICD ECU Back-up Power ECU Power ECU Ground
Wire A/C so motor won't die?!?!?!?
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benemorius
- Posts: 1937
- Joined: Tue Jun 08, 2004 5:39 pm
- Car: s13, s13, eg, e36
Re: Wire A/C so motor won't die?!?!?!? (mirra32)
Your subject seems to suggest that the a/c is coming on but the engine isn't switching to fast idle. Is that the case or is the a/c not coming on at all?
Re: Wire A/C so motor won't die?!?!?!? (benemorius)
right now i have my ac wired to a switch.....so the ecu isn't speeding up the engine at all....i'm trying to figure out what to do....
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benemorius
- Posts: 1937
- Joined: Tue Jun 08, 2004 5:39 pm
- Car: s13, s13, eg, e36
Re: Wire A/C so motor won't die?!?!?!? (mirra32)
What is it you have wired to a switch? The a/c compressor clutch? I hope not.
The compressor clutch, aux fan, and fast idle solenoid are all operated by the same relay. The ecu controls this relay based on inputs including pressure and temperature for safety. Bypassing this is a foolish move, even temporarily.
Wire it up as best you know how, then tell me what works and what doesn't and we'll go from there.
The compressor clutch, aux fan, and fast idle solenoid are all operated by the same relay. The ecu controls this relay based on inputs including pressure and temperature for safety. Bypassing this is a foolish move, even temporarily.
Wire it up as best you know how, then tell me what works and what doesn't and we'll go from there.
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benemorius
- Posts: 1937
- Joined: Tue Jun 08, 2004 5:39 pm
- Car: s13, s13, eg, e36
Re: (mirra32)
To have the compressor on a switch, you mean? Well, compare it to opening up the hood and wedging a piece of cardboard in the throttle to "fix" your cruise control.
You're removing all control of the compressor. The ecu can no longer turn it on and off to keep the evaporator core at the right temperature. The dual pressure switch can no longer shut down the system if the pressure gets too low (risking compressor damage) or too high (risking damage of damn near anything - possibly loss of life.) The compressor isn't supposed to be on all the time. That is NOT how things work.
You're removing all control of the compressor. The ecu can no longer turn it on and off to keep the evaporator core at the right temperature. The dual pressure switch can no longer shut down the system if the pressure gets too low (risking compressor damage) or too high (risking damage of damn near anything - possibly loss of life.) The compressor isn't supposed to be on all the time. That is NOT how things work.