ac blows hot air
Thread Starter
Member
Joined: Dec 2009
Posts: 128
From: NC
ac blows hot air
idk wat to do.. i put the temperature on 60 degrees and the car does not blow cold air.. the air isnt as hot as 90 degrees but nowhere near 60 degrees.. i checked the refrigerant level and there is enough fluid so i dont know what is wrong ... i dont want to have to take it to nissan anyone have an idea what could b wrong?
Senior Member
Joined: May 2006
Posts: 2,460
From: Bremerton, WA
might try the secret/service menu here http://forums.maxima.org/6th-generat...vice-menu.html
A. Enter HVAC Self-Diagnostics Mode
1. Turn ignition switch to “ON”.
2. Within 10 seconds after starting engine
press “OFF” switch for at least 5 seconds.
B. Step B Does code #20 appear on the display 25 seconds after 2 appears in the right side of screen?
IF Yes GO TO Step C.
IF No GO TO Step M.
C. Check operation of temp switch
1. Press top of driver side temperature switch
2. Does the temperature switch advance to self-diagnosis Step C?
IF Yes GO TO Step D.
IF No you have a malfunctioning temperature switch.
Replace A/C switch.
D. Check to return to self-diag Step B
1.Press bottom of driver side temperature switch.
2.Does the temperature switch return to self-diagnosis Step B?
If Yes GO TO Step E.
If No you have a malfunctioning temperature switch.
Replace A/C switch.
E: Mode Door And Intake Door Positions Checked
1. Press top of driver side temperature switch.
2. Does code #30 appear on the display 50 seconds after 3 is displayed in right side of screen?
If Yes GO TO Step F.
If No GO TO Step N.
F. Check Operation of Actuators
1. Press top of driver side temperature switch.
2. Press DEF switch. Code Numbers. 41-46 will be displayed as each actuator test is being conducted.
Checks must be made by listening to noise and feeling air flow from outlets with your hand,.
G. Check Actuators
IF OK GO TO Step H.
If not OK Air outlet does not change.
Then Go to Mode Door Motor Circuit .
Intake door does not change.
Go to Intake Door Motor Circuit
Blower motor operation is malfunctioning.
Then Go to Blower Motor Circuit
Magnet clutch does not engage.
Go to Magnet Clutch Circuit
Discharge air temperature does not change.
Then Go to Air Mix Door Motor Circuit
H. Temperature of Each Sensor Checked
1. Press top of the driver side temperature switch.
2. IF Code No. 51 appears on the display Go To Step I.
I. Check Ambient Temperature Sensor
Press “DEF” switch one time. Temperature detected by ambient temperature sensor is shown on the display
If temperature on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step J.
If Not OK Check ambient sensor circuit
J. Check In Vehicle Sensor
Press “DEF” switch a second time. Temperature detected by in vehicle sensor is shown on the display.
If temperature shown on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step K.
If not OK Check In vehicle sensor circuit
K. Check Intake Temperature Sensor
Press “DEF” switch a third time. Temperature detected by intake sensor is shown on the display
If temperature shown on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step L.
If not OK Go to intake sensor circuit .
L. Check CAN Communications
1. Press “REC” switch.
2. CAN communication error between unified meter and A/C amp.
and Display Unit or Display Control Unit is detected.
If OK Turn ignition switch “OFF” or “AUTO” switch to “ON”.
The diagnostic procedure is complete.
M. Malfunctioning Sensor Codes
If two or more sensors are bad the corresponding codes blink respectively twice.
Conduct Step B during daylight outside or have a bright light shine on windshield or Code 25 will be indicated even though the sunload sensor is good..
Code No. Sensor Malfunctioning
21 Ambient Temperature Sensor
22 In Vehicle Temperature Sensor
24 Intake Temperature Sensor
25 Sunload Sensor
26 Air Mix Door Motor PBR on driver side
27 Air Mix Door Motor PBR on passenger side
PLEASE DON'T TRY THIS IF YOU ARE NOT SURE HOW TO USE IT. I WILL NOT BE RESPONSIBLE FOR ANY DAMAGE CAUSED BY USING THIS OR ANY ERRORS I MADE IN DOCUMENTING THE PROCEDURE
A. Enter HVAC Self-Diagnostics Mode
1. Turn ignition switch to “ON”.
2. Within 10 seconds after starting engine
press “OFF” switch for at least 5 seconds.
B. Step B Does code #20 appear on the display 25 seconds after 2 appears in the right side of screen?
IF Yes GO TO Step C.
IF No GO TO Step M.
C. Check operation of temp switch
1. Press top of driver side temperature switch
2. Does the temperature switch advance to self-diagnosis Step C?
IF Yes GO TO Step D.
IF No you have a malfunctioning temperature switch.
Replace A/C switch.
D. Check to return to self-diag Step B
1.Press bottom of driver side temperature switch.
2.Does the temperature switch return to self-diagnosis Step B?
If Yes GO TO Step E.
If No you have a malfunctioning temperature switch.
Replace A/C switch.
E: Mode Door And Intake Door Positions Checked
1. Press top of driver side temperature switch.
2. Does code #30 appear on the display 50 seconds after 3 is displayed in right side of screen?
If Yes GO TO Step F.
If No GO TO Step N.
F. Check Operation of Actuators
1. Press top of driver side temperature switch.
2. Press DEF switch. Code Numbers. 41-46 will be displayed as each actuator test is being conducted.
Checks must be made by listening to noise and feeling air flow from outlets with your hand,.
G. Check Actuators
IF OK GO TO Step H.
If not OK Air outlet does not change.
Then Go to Mode Door Motor Circuit .
Intake door does not change.
Go to Intake Door Motor Circuit
Blower motor operation is malfunctioning.
Then Go to Blower Motor Circuit
Magnet clutch does not engage.
Go to Magnet Clutch Circuit
Discharge air temperature does not change.
Then Go to Air Mix Door Motor Circuit
H. Temperature of Each Sensor Checked
1. Press top of the driver side temperature switch.
2. IF Code No. 51 appears on the display Go To Step I.
I. Check Ambient Temperature Sensor
Press “DEF” switch one time. Temperature detected by ambient temperature sensor is shown on the display
If temperature on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step J.
If Not OK Check ambient sensor circuit
J. Check In Vehicle Sensor
Press “DEF” switch a second time. Temperature detected by in vehicle sensor is shown on the display.
If temperature shown on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step K.
If not OK Check In vehicle sensor circuit
K. Check Intake Temperature Sensor
Press “DEF” switch a third time. Temperature detected by intake sensor is shown on the display
If temperature shown on display differs greatly from actual temperature, check sensor circuit first and then inspect sensor.
If OK GO TO Step L.
If not OK Go to intake sensor circuit .
L. Check CAN Communications
1. Press “REC” switch.
2. CAN communication error between unified meter and A/C amp.
and Display Unit or Display Control Unit is detected.
If OK Turn ignition switch “OFF” or “AUTO” switch to “ON”.
The diagnostic procedure is complete.
M. Malfunctioning Sensor Codes
If two or more sensors are bad the corresponding codes blink respectively twice.
Conduct Step B during daylight outside or have a bright light shine on windshield or Code 25 will be indicated even though the sunload sensor is good..
Code No. Sensor Malfunctioning
21 Ambient Temperature Sensor
22 In Vehicle Temperature Sensor
24 Intake Temperature Sensor
25 Sunload Sensor
26 Air Mix Door Motor PBR on driver side
27 Air Mix Door Motor PBR on passenger side
PLEASE DON'T TRY THIS IF YOU ARE NOT SURE HOW TO USE IT. I WILL NOT BE RESPONSIBLE FOR ANY DAMAGE CAUSED BY USING THIS OR ANY ERRORS I MADE IN DOCUMENTING THE PROCEDURE
Member
Joined: Jan 2003
Posts: 160
From: Boston
there were 2 other threads over the past few weeks on AC issues. Check out the other threads for diagnosis steps and suggestions.
http://forums.maxima.org/6th-generat...en-turned.html
http://forums.maxima.org/6th-generat...itioner-2.html
http://forums.maxima.org/6th-generat...en-turned.html
http://forums.maxima.org/6th-generat...itioner-2.html
Thread Starter
Member
Joined: Dec 2009
Posts: 128
From: NC
so i finally got around to going to go get the ac checked and the info i got scared me the hell away...
the shop i went to told me that it may need a recharge which ive heard that many times but then they told me that when they recharge it theyll shoot some dye or somthing to see where the leak is and how the ac will probably work for 3days and if it doesnt after that there no warranty on the recharge
soo basically they expect me to play a gambling game of 100 dollars.. anyone think its worth it? is this what this ac recharge thing is all about?? on avergae how muh is a rechage/vacumning?
the shop i went to told me that it may need a recharge which ive heard that many times but then they told me that when they recharge it theyll shoot some dye or somthing to see where the leak is and how the ac will probably work for 3days and if it doesnt after that there no warranty on the recharge
soo basically they expect me to play a gambling game of 100 dollars.. anyone think its worth it? is this what this ac recharge thing is all about?? on avergae how muh is a rechage/vacumning?
Newbie - Just Registered
Joined: Jul 2011
Posts: 1
I went to the Nissan dealership to check the up on the same problem that your having and they diagnosed that I needed to replace the AMPLIFIER - CON (Part# 277607Y000) and because my outside temp reading was -22c I also needed to replace the ambient temp sensor. The problem was solved but the connector for the temp sensor in my car was cut off and all I have are the wires just hanging under the car, anyone knows where I can find that harness for the temp sensor?
Senior Member
Joined: Oct 2007
Posts: 1,531
I went to the Nissan dealership to check the up on the same problem that your having and they diagnosed that I needed to replace the AMPLIFIER - CON (Part# 277607Y000) and because my outside temp reading was -22c I also needed to replace the ambient temp sensor. The problem was solved but the connector for the temp sensor in my car was cut off and all I have are the wires just hanging under the car, anyone knows where I can find that harness for the temp sensor?
Member
Joined: Jul 2010
Posts: 53
From: Omaha, NE
Never mind, I'm dumb.
Now another question... where's the temperature sensor inside of the car? The climate control thinks the inside of the car is 42 degrees, when it's about 85. I need to check it and possibly replace it.
Now another question... where's the temperature sensor inside of the car? The climate control thinks the inside of the car is 42 degrees, when it's about 85. I need to check it and possibly replace it.
Senior Member
Joined: Oct 2007
Posts: 1,531
Check the FSM, really clear diagnostic procedure. You can find a link to FSM in a thread here.
Seems to be below and to the right of your steering wheel.
Seems to be below and to the right of your steering wheel.
In-vehicle Sensor
The in-vehicle sensor is located on instrument lower driver panel. It
converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the unified
meter and A/C amp.converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the unified
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