The rear air conditioning unit failed in my 96 Quest. First, the failure was intermittent and could be solved by running the slide switch back and forth on the front thermostat console. I'm sure this the cause, but can't afford to replace one thing after another. What is the most affordable test I could do to troubleshoot the rear air?

Fuse 12 for the brake switch, but it covers a lot of other things as well that would be very noticeable.

Automatic Speed Control Device (ASCD) Brake Switch, Data Link Connector, Combination Meter, Heated Seat Relay, Park Neutral Position Switch, Display Unit, Steering Angle Sensor, Display Control Unit, Navi Control Unit, Back Door Control Unit, Sliding Door Control Unit RH/LH, Sonar Control Unit, Daytime Running Lights, Hands Free Telephone

Nissan Quest (V42; 2004-2009) fuses and relays

Fuse Box Diagrams https://fuse-box.info > nissan > nissan-quest-v42-2004...

Here you will find fuse box diagrams of Nissan Quest 2004, 2005, 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car ...

Missing: 1994 ‎' Show results with: 1994

Do you know how these wipers Work / what controls them ? Do you know what a smart junction box is ?
Rear Window Wiper Operation
The rear wiper motor is controlled by the SJB. The SJB supplies power to the rear wiper motor from the integrated rear wiper relay. The SJB will activate the relay when all of the following conditions are met:

• Ignition switch is in the ON position
• Liftgate glass and liftgate are closed
• Multifunction switch is in the ON or INTERMITTENT position

The SJB also supplies voltage to the rear wiper motor from SJB fuse 21 (10A) when the ignition switch is in the ON position. This power feed is used to continue the wipe cycle when the multifunction switch is turned to the OFF position. The SJB receives inputs from the multifunction switch that applies ground to the low speed wipe input or applies ground to the intermittent wipe input. When either of these circuits are grounded, the SJB activates the integrated rear wiper relay and power is supplied to the rear wiper motor to move the rear wiper motor from the PARK position. An internal switch in the rear wiper motor then moves to the RUN position which connects the accessory relay power to the rear wiper motor. When the rear wiper motor returns to the PARK position, the internal switch in the rear wiper motor moves back to the PARK position. If the multifunction switch is in the ON position, the rear wiper relay is still activated, power is supplied to the rear wiper motor, and the wipe cycle starts again. If the multifunction switch is in the INTERMITTENT position, the rear wiper relay does not activate until the predetermined dwell time has elapsed, at which time the SJB activates the rear wiper relay and the wipe cycle starts again.

Do you know what DTC'S - diagnostic trouble codes are ?
Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1244 Wiper Rear Motor Run Relay Coil Circuit Failure SJB If the rear wiper is inoperative, Go To Pinpoint Test B . If the rear wiper is always ON, Go To Pinpoint Test D . B1245 Wiper Rear Motor Run Relay Coil Circuit Short to Battery SJB Go To Pinpoint Test B . B1614 Wiper Rear Mode Select Switch Circuit Failure SJB Go To Pinpoint Test D .
Did you have it checked for DTC'S ?

Is the compressor running when the engine is running ?

Hi there:DTC P0455 - Evaporative Emission (EVAP) System Large Leak Detected

The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve open and the EVAP canister vent solenoid valve closed. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets.
The table illustrates the relationship between the ON and OFF states, and the Open or Closed states of the EVAP canister purge and vent solenoid valves.

This diagnostic procedure supports the following DTC:

CONDITIONS FOR RUNNING THE DTCBefore the powertrain control module (PCM) can report DTC P0455 failed, DTC P0496 must run and pass.DTCs P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0154, P0155, P0156, P0157, P0158, P0160, P0161, P0220, P0442, P0443, P0449, P0451, P0452, P0453, P0454, P0464, P0496, P0502, P0503, P1111, P1112, P1114, P1115, P1121, P1122, P1125, P2135 are not set.The engine is running.The ignition voltage is between 10-18 volts .The barometric pressure (BARO) is more than 75 kPa .The fuel level is between 15-85 percent .The engine coolant temperature (ECT) is between 4-65 degrees C (39-149 degrees F) .The intake air temperature (IAT) is between 4-75 degrees C (39-167 degrees F) .The start-up ECT and IAT are within 9 degrees C (16 degrees F) of each other.DTC P0455 runs once per cold start.

CONDITIONS FOR SETTING THE DTC The EVAP system is not able to achieve or maintain vacuum during the diagnostic test.

ACTION TAKEN WHEN THE DTC SETSThe control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTCThe control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDSTo help locate intermittent leaks, use the J 41413-200 Evaporative Emission System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity White Light. Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
A temporary blockage in the EVAP canister purge solenoid valve, purge pipe, or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT.Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections. See: Diagrams\Diagnostic Aids

TEST DESCRIPTIONNumbers below refer to the step numbers on the diagnostic table.
Introducing smoke in 15-second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.This step verifies proper operation of the FTP sensor.A normal operating FTP sensor should increase above 5 inches of H2O and stop between 6-7 inches of H2O.
Fig: 01Fig. 02Fig. 03

Hope this helps.

P0336 - Crankshaft Position Sensor A Circuit Range/Performance
Possible causes of DTC P336 include faulty Crank sensor, faulty ICM (Ignition Control Module), faulty cam sensor, faulty PCM (Powertrain Control Module), or open/short in wiring harness.

A scan tool with testing capabilities and live data feed is really needed to accurately diagnose this code so that you are not wasting money replacing parts that are actually good. If crank sensor is bad the crankshaft pulley does have to come off to access it.



Circuit Description
The Crankshaft Position Sensor is mounted in the right rear of the engine block behind the starter. The CKP sensor works in conjunction with a 24X reluctor wheel mounted on the rear of the crankshaft. The CKP sensor has a B+ power supply, a ground, and a signal circuit.

As the crankshaft rotates, the reluctor wheel teeth interrupt a magnetic field produced by a magnet within the sensor. The sensor's internal circuitry detects this and produces a signal which the PCM reads. The PCM uses this signal to accurately measure crankshaft velocity which is a variable used in order to detect misfire, spark and, fueling.

Conditions for Running the DTC
* Engine Speed is between 500 and 4000 RPM.
* Ignition Voltage is between 5.0 and 17.0 volts.

Conditions for Setting the DTC
The PCM determines that the CKP sensor signal is out of range for less than 1 second.
Action Taken When the DTC Sets:
* The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
* The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC
* The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
* A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
* A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
* Use a scan tool in order to clear the MIL and the DTC.

Diagnostic Aids
Important: Remove any debris from the PCM\TAC module connector surfaces before servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets when diagnosing/replacing the modules. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the PCM\TAC modules.

The following problems may cause this DTC to set:
* Poor connections/terminal tension at the sensor.
* Crankshaft reluctor wheel damage or improper installation.
* The sensor coming in contact with the reluctor wheel.
* The engine running out of fuel.
* If the crankshaft rotates backwards, this DTC will set. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.

Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. For an intermittent condition, refer to Symptoms .

Excess crankshaft end play will cause the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:
* A no start
* A start and stall
* Erratic performance

An improperly installed propeller shaft could cause excess crankshaft end play. Refer to Engine Mechanical for excess crankshaft end play diagnosis.


I hope this helps to solve it; remember to rate this answer. Keep us updated.

The ignition switch it self may be going bad and may need to be replaced. If you have many keys on your key chain, this will promote the ignition keys to fail. The ignition switch's job became more complex as accessories like radios, electric windshield wipers and heater blower motors were added to vehicles. Moving beyond its original role as a simple on-off switch for the engine's ignition system, the ignition switch was also designed to supply electricity through an accessory position on the switch. This allowed accessories to function in a key-on, engine-off situation without overheating and oxidizing the contact points in the engine's distributor. As more accessories like power windows, power door locks, power seats, air conditioning and electronic automatic transmissions were added, the ignition switch's job became even more demanding.

Today, the ignition switch is a complex device that powers numerous electrical and electronic systems throughout the vehicle. In fact, the newest version of the conventional ignition key is an electronic device that identifies the driver and allows him to activate the starting system on demand.

Most ignition switches incorporate spring-loaded, sliding contacts to transmit adequate amperage to individual fuse and relay circuits. As these contacts begin to wear, they may lose their ability to make perfect mechanical contact. In other instances, they may begin to oxidize due to heavy amperage flow. In either case, the contacts begin to develop electrical resistance that reduces amperage flow through the ignition switch.

Very few ignition switches fail catastrophically. Most begin to fail intermittently and are usually sensitive to temperature and humidity. If the internal sliding contacts are heavily greased during assembly, the grease may begin to harden and inhibit mechanical contact during cold weather. If the switch fails during heavy accessory loads, the internal sliding contacts may have become heavily oxidized or succumbed to heat distortion and loss of mechanical integrity. In any case, most ignition switches give ample warning of an impending failure via intermittent ignition or accessory operation under various conditions of temperature and electrical load.

Good luck and hope this will lead you to addressed the issues your having with your car. Keep me posted, be glad to know you got your car running 100% again soon.

Diagnostic Aids

• Low system airflow can cause an intermittent complaint. Inspect for the following conditions:
  • Any restriction in the exhaust system that may produce back pressure
  • Pinched, kinked, restricted, or leaking pipes, hoses, or fittings
  • A restricted pump inlet hose, duct, or filter
  • Pinched, kinked, restricted, or leaking vacuum lines
  • Heat damage
• A short to voltage in the pump relay control circuit can result in the AIR pump running continuously with the ignition OFF by back-feeding to ground. This will eventually result in pump failure.
• An AIR pump that had become inoperative and had shown indications of having exhaust gases in the outlet port would indicate check valve failure.
• Notice Do not operate the AIR pump for more than 60 seconds. Continuous operation of the AIR pump in excess of 60 seconds will damage the AIR pump.
  
  If the DTC cannot be duplicated and is determined to be intermittent, reviewing the Failure Records data can be useful in determining when the DTC was last set. Also refer to Intermittent Conditions

That has to do with your computer for your body controls, such a/c, heater, wipers, etc...
Most common problem is drinks spilling into the computer which is right between the cup holder. It will eventually cause a problem with a/c most likely.

sounds like a damper door in the front not working properly, these are actuated by the front temp control, the door is operated by either a manual cable, and electric actuator, or vacuum. I hope this helps you zero in on your problem. Merry Christmas

Trouble Code: P0139
O2 (B1 S2) Slow Response
Trouble Code Conditions:Engine started; vehicle driven at 20-55 mph with the throttle open for 2 minutes; ECT at more than 158ºF (70C); catalytic converter temperature is more than 1112F (600C); and EVAP purge is active. O2 Sensor signal voltage switches less than 16 times from lean to rich within 20 seconds during monitoring, or will compare the state of change between the front and rear O2 Sensors and if the differences are greater than a calibrated amount, the DTC will set. 3 good trips are required to turn off the MIL.
Possible Causes:

• Exhaust leak
• O2 element is contaminated, deteriorated or it has failed
• O2 signal circuit or return circuit has failed

Trouble Code: P0344
Camshaft Position Sensor Circuit Intermittent
Trouble Code Conditions:Engine cranking or running; system voltage over 10.5v. The PCM detected an intermittent loss of the CMP Sensor signal during the period of 2.5 complete engine revolutions. The failure counter must reach 20 before this code matures and a code is set.
Possible Causes:

• Wiring harness fault
• 5v supply circuit open or shorted to ground
• Tone wheel/pulse ring is damaged or corroded
• CMP Sensor has failed
• CMP Sensor signal circuit is open, shorted to ground or battery voltage or 5v supply
• CMP Sensor ground circuit is open
• PCM has failed
• Trouble Code: P0340
  No Camshaft Position Sensor Circuit Failure
  Trouble Code Conditions:Engine cranking or running, system voltage over 10v. The PCM detected CKP pulses without detecting any CMP Sensor pulses for 5 seconds or 2.5 engine revolutions.
  Possible Causes:
  
• CMP Sensor connector is damaged, open or it is shorted
• CMP Sensor signal circuit is open or shorted to ground or to battery voltage or 5v supply circuit
• CMP Sensor 5v supply circuit is open or shorted to ground or to battery voltage
• CMP Sensor ground circuit is open
• CMP Sensor is damaged or has failed
• CKP Sensor is damaged or has failed
• PCM has failed

Good luck....