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Omega iTHX-SD data values rotate among 3 data tags
The data values for temp, humidity, dewpoint rotate among all 3 every 60 seconds (20 seconds each). i.e., temp shows temp, then humidity, then dewpoint.
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DTC P1778 STEP MOTOR - FUNCTION ...............176 Description ...........................................................176 CONSULT-II Reference Value ..............................176 On Board Diagnosis Logic ...................................176 Possible Cause ....................................................176 DTC Confirmation Procedure ...............................176 WITH CONSULT-II ............................................176 WITH GST ........................................................177 Diagnostic Procedure ...........................................177
DTC P1778 STEP MOTOR - FUNCTION Revision: 2004 November 2004 Murano DTC P1778 STEP MOTOR - FUNCTION PFP:31947 Description ACS0021D ? The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled. ? This diagnosis item detects when electrical system is OK, but mechanical system is NG. ? This diagnosis item detects when the state of the changing the speed mechanism in unit does not operate normally. CONSULT-II Reference Value ACS0032Q Remarks: Specification data are reference values. On Board Diagnosis Logic ACS0032R ? This is an OBD-II self-diagnostic item. ? Diagnostic trouble code "STEP MOTR/FNC" with CONSULT-II or P1778 without CONSULT-II is detected under the following conditions. - When not changing the pulley ratio according to the instruction of TCM. Possible Cause ACS0032S Step motor DTC Confirmation Procedure ACS0032T CAUTION: ? Always drive vehicle at a safe speed. ? Be careful not to rev engine into the red zone on the tachometer. ? Before starting "DTC Confirmation Procedure", confirm "Hi" or "Mid" or "Low" fixation by "PRI SPEED" and "VEHICLE SPEED" on "DATA MONITOR MODE". ? If hi-geared fixation, go to diagnostic procedure soon. NOTE: If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 5 seconds before performing the next test. After the repair, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated. WITH CONSULT-II 1. Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-II. 2. Make sure that output voltage of CVT fluid temperature sensor is within the range below. FLUID TEMP SEN: 1.0 - 2.0V If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid) Item name Condition Display value (Approx.) STM STEP (step) During driving -20 step - 190 step GEAR RATIO 2.37 - 0.43
DTC P1778 STEP MOTOR - FUNCTION CVT-177 D E F G H I J K L M A B CVT Revision: 2004 November 2004 Murano 3. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-II. 4. Start engine and maintain the following conditions for at least 30 consecutive seconds. TEST START FROM 0 km/h (0 MPH) CONSTANT ACCELERATION: Keep 30 sec or more VEHICLE SPEED: 10 km/h (6 MPH) or more ACC PEDAL OPEN: More than 1/8 Selector lever: D position ENG SPEED: 450 rpm or more 5. If DTC is detected, go to CVT-177, "Diagnostic Procedure" . WITH GST Follow the procedure "WITH CONSULT-II". Diagnostic Procedure ACS0032U 1. CHECK STEP MOTOR ? It is monitoring whether "GEAR RATIO: 2.37 - 0.43" changes similarly to "STM STEP: -20 - 190" by "DATA MONITOR" mode. Refer to CVT-64, "DATA MONITOR MODE" . ? If no CONSULT-II, inspect the engine speed (rise and descend), vehicle speed, throttle opening angle, and check shift change. OK or NG OK >> INSPECTION END NG >> Replace the transaxle assembly. Refer to CVT-224, "Removal and Installation" . S
Step motor DTC Confirmation Procedure ACS0032T CAUTION: ? Always drive vehicle at a safe speed. ? Be careful not to rev engine into the red zone on the tachometer. ? Before starting "DTC Confirmation Procedure", confirm "Hi" or "Mid" or "Low" fixation by "PRI SPEED" and "VEHICLE SPEED" on "DATA MONITOR MODE". ? If hi-geared fixation, go to diagnostic procedure soon. NOTE: If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 5 seconds before performing the next test. After the repair, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated. WITH CONSULT-II 1. Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-II. 2. Make sure that output voltage of CVT fluid temperature sensor is within the range below. FLUID TEMP SEN: 1.0 - 2.0V If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid)
The specific location of the sender is on back of cylinder-head near by vacuum-fuel double pump. There is an assurance clip and a rubber sealing O-ring. Heed of antifreeze solution temperature!!! Before you try to change the sender you must be sure that the sender is out of order. First you must check the thermostat operating. Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order. 5. If the thermostat and the temp sender are OK the last piece out of order will be the instrument cluster.
Heed of antifreeze solution temperature!!! You must check the thermostat operating. The thermostat location is on back of alternator at the bottom side of the bracket. IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!! Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order. 5. If the thermostat and the temp sender are OK the last piece out of order will be the instrument cluster.
Have it check for codes , an scan data checked on a factory scan tool ! The temp.blend actuator is electronically controlled by the HVAC control panel . Do you hear any clicking behind the dash ? Is it manual or automatic climate control ?
Air Temperature Actuator
The air temperature actuators are a 5-wire bi-directional electric motor that incorporates a feedback potentiometer. Ignition 3 voltage, low reference, control, 5-volt reference and position signal circuits enable the actuator to operate. The control circuit uses either a 0, 2.5 or 5-volt signal to command the actuator movement. When the actuator is at rest, the control circuit value is 2.5 volts. A 0 or 5 volt control signal commands the actuator movement in opposite directions. When the actuator shaft rotates, the potentiometers adjustable contact changes the door position signal between 0-5 volts.
The HVAC control module uses a range of 0-255 counts to index the actuator position. The door position signal voltage is converted to a 0-255 count range. When the module sets a commanded, or targeted, value, the control signal is changed to either 0 or 5 volts depending upon the direction that the actuator needs to rotate to reach the commanded value. As the actuator shaft rotates the changing position signal is sent to the module. Once the position signal and the commanded value are the same, the module changes the control signal to 2.5 volts.
DTC'S
B0174 is for the upper left air temperature sensor.
• B0179 is for the lower left air temperature sensor
B0414 is for the left air temperature actuator.
• B0408 is for the left air temperature actuator.
If the MAF sensor is faulty it should be setting a trouble code in the computer. The sensor measures air volume coming into the intake manifold from the air filter. A faulty MAF sensor could kill the engine - it sends a signal or data to the computer - you would need a scanner to "watch" the data stream while on the road.
Heed of antifreeze coolant temperature!!! First time you might check the thermostat operating. The thermostat location for VW Golf 1.6 is inside of coolant thermostat housing placed on back side of the cylinder head. See pictures below. Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order.
Thermostat location, Part number: 032121110B, in german - "Kuehlregle" (Price around $20):
Important note: Always replace the thermostat round seal, position 6 in the above picture.
Heed of antifreeze solution temperature!!! You must check the thermostat operating. The thermostat location for 1997 Audi A4 1.9 TDI is on back of alternator at the bottom side of the bracket. IMPORTANT NOTE: It is NOT necessary to replace the alternator if you want to change the thermostat !!! Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order. 5. If the thermostat and the temp sender are OK the last piece out of order will be the instrument cluster.
Heed of antifreeze solution temperature!!! You must check the thermostat operating. The thermostat location is on back of alternator at the bottom side of the bracket. IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!! Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order.
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