2004 DAEWOO NUBIRA high idle speed

ZF 4 HP 16 AUTOMATIC TRANSAXLE 5A1 – 189
DAEWOO V–121 BL4
S No input speed error DTCs P0715, P0716, or
P0717.
S Output speed is greater than 256 rpm.
S Input speed is greater than 400 rpm.
S 4–2 gear shift is active.
S Immediately after the above condition occurs.
Action Taken When The DTC Sets
S The Malfunction Indicator Lamp(MIL) will illuminate.
S The TCM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffer.
S Adopt Emergency/ Substitute mode and constant
4th gear.S Open lock–up clutch.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF when the malfunction has
not occurred after three–ignition cycle.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Using a scan tool can clear history DTCs.
Diagnostic Aids
S When DTC P1886 sets, the possible cause of fault
could be TCM.
DTC P1886 – 4–2 Shift Malfunction
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the check completed?–Go to Step 2Go to ”On–
Board Diagnos-
tic System
Check”
21. Install the scan tool.
2. Turn the ignition ON, with the engine OFF.
Then, start engine and allow it to warm up at
idle.
3. Observe ”idle rpm, TPS” on the scan tool.
Was a problem found?–Go to ”Engine
Diagnostic In-
formation”Go to Step 3
3Inspect ”ECM”. Refer to Section 1F, System Diagno-
sis, EOBD System Check.
Was a problem found?–Go to ”Engine
Diagnostic In-
formation”Go to Step 4
41. Turn the ignition OFF.
2. Disconnect the TCM wiring connector.
3. Measure the voltage between terminal B3 and
B13 of the transaxle wiring connector.
4. Turn the ignition ON.
5. Measure the voltage between terminal C15 and
B13 of the transaxle wiring connector.
6. Measure the voltage between terminal C16 and
B13 of the transaxle wiring connector.
Is the voltage within the values shown?11–14VGo to Step 5Go to ”System
Voltage Low or
High”
5Replace the TCM.
Is the action complete?–Go to Step 6–
61. After the repair, use a scan tool ”clear info”
function and road test the vehicle.
2. Review the ”DTC info”.
Has the last test failed or is the current DTC dis-
played?–Replace the
transaxle as-
semblyRepair verified
exit DTC chart

5C – 8ICLUTCH
DAEWOO V–121 BL4
CLUTCH RELEASE POINT
ADJUSTMENT
Adjustment Procedure
1. Apply the parking brake.
2. Run the engine at idle speed.
3. While you move the shift lever into the reverse
position, depress the clutch pedal slowly and mea-
sure the distance between the point when gear
noise is not heard and the point the clutch pedal is
completely depressed. The distance should be 30
to 40 mm (1.2 to 1.6 inches).
4. If the distance is not within the specified value,
check the following:
S Clutch pedal height
S Clutch pedal play
S Air in the system
S Clutch cover and disc pressure plate
AIR BLEEDING
Bleed the hydraulic system to remove the air which en-
tered when the pipes were disconnected for repairs. The
clutch/brake fluid in the clutch/brake reservoir must be
maintained at the MIN level or higher during air bleeding.
1. Attach a vinyl hose to the bleeder plug. Place the
other end of the vinyl tube in a glass container half–
filled with brake fluid.
2. Slowly pump the clutch pedal several times.
3. While you press the clutch pedal, loosen the bleed-
er screw until the fluid starts to run out. Close the
bleeder screw.
4. Repeat Step 3 until there are no air bubbles in the
fluid.
5. Fill the reservoir with brake fluid up to the proper
level.
PRESSURE PLATE AND CLUTCH
DISC
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the transaxle from the vehicle. Refer to
Section 5B, Five–Speed Manual Transaxle.
3. Remove the pressure plate bolts and the pressure
plate.
Important : Support the pressure plate when you remove
the last bolt.

6A – 2IPOWER STEERING SYSTEM
DAEWOO V–121 BL4
DIAGNOSIS
POWER STEERING SYSTEM
PRESSURE TEST
Tools Required
KM–354–B Pressure Test Gauge Kit
Check the fluid pressure as follows to determine whether
the trouble is in the pump or the gear unit.
Test Procedure
1. Check the power steering fluid level and the power
steering pump belt tension. Refer to ”Checking and
Adding Fluid” in this section and Section 6B, Power
Steering Pump.
2. Disconnect the high pressure line at the pump. Use
a small container to catch any fluid.
3. Connect the hose of the pressure test gauge kit
KM–354–B to the power steering pressure hose
from the power steering pump.
4. Place the gear selector lever in PARK (automatic
transaxle–equipped vehicles) or NEUTRAL (manual
transaxle–equipped vehicles). Set the parking
brake.
5. Open the gauge valve fully.
6. Start the engine and let it idle.
7. Turn the steering wheel from lock to lock several
times to warm the fluid to operating temperature.
8. Increase the engine speed to 1,500 rpm.
Notice : The power steering pump could be damaged if
the valve is fully closed for more than 5 seconds.
9. Close the gauge valve fully, and read the pressure.
The pump pressure with the valve closed should be
between 8,330 kPa to 8,820 kPa (1,208 psi to
1,279 psi). With electronic variable orifice, the pres-
sure should be between 8,500 kPa to 8,960 kPa
(1,233 psi to 1,299 psi).
10. Immediately open the gauge valve fully.
11. Turn the steering wheel all the way to the left and
the right. If the pressure is within the specified lim-
its, the problem is not in the pump. Check the pow-
er steering gear for leaks.
POWER STEERING SYSTEM LEAK
TEST
General Procedure
Inspect the following:
S The fluid reservoir for overfill.
S Fluid for aeration and overflow.
S The hoses for loose connections.
S The torsion bar, stub shaft and adjuster seals for
leaks.
S The component sealing surfaces for damage.
Important : Verify the exact point of the leak. The point
from which the fluid is dripping is not necessarily the point
at which the system is leaking. When service is required,
clean the leak area upon disassembly, replace the leaking
seal, check the component sealing surfaces for damage
and reset the torque bolt to specifications, where required.
External Leak Check
The purpose of this procedure is to pinpoint the location of
the leak. In some cases, the leak can be easily located, but
seepage–type leaks may be harder to find. To locate seep-
age leaks, use the following method:
1. With the engine off, wipe dry the complete power
steering system.
2. Check the power steering fluid level in the pump’s
reservoir. Adjust the fluid level as necessary. Refer
to ”Checking and Adding Fluid” in this section.
Notice : Do not hold the steering wheel at a stop for any
length of time as this can damage the power steering
pump.
3. Start the engine. Turn the steering wheel counter-
clockwise and clockwise from stop to stop several
times.
4. Find the exact area of the leak and repair it.

7D – 8IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
NO HOT AIR FROM BLOWER
StepActionValue(s)YesNo
1Check the coolant level.
Is the coolant level correct?–Go to Step 3Go to Step 2
2Add coolant as needed.
Is the heater operating?–System OKGo to Step 3
31. Turn the ignition to ON.
2. Observe the temperature indication screen of
the controller.
Does the digit flash on and off?–Go to Step 4Go to Step 5
4Run a self–diagnosis circuit check.
Does the display indicate a defect code?–Go to the table
for the code
that flashesGo to Step 7
5Observe the blower motor operation.
Is the blower motor functioning at all?–Go to Step 6Go to ”Blower
Motor Does
Not Run at All”
6Use the blower push switch to cycle the blower
through its different speeds.
Does the motor function at different speeds?–Go to Step 7Go to ”Code 6
– Power Tran-
sistor Error”
71. Run the blower and operate the MODE push
switch manually.
2. Check for airflow out the various outlets.
Does the air flow from the different outlets as it
should?–Go to Step 9Go to Step 8
81. Remove the heater outlet and check for ob-
structions.
2. Remove any obstructions found.
Is the heater operating?–System OKGo to Step 9
9Observe the air mix door (AMD) motor while chang-
ing the temperature setting from 18 to 32°C (64 to
90°F) and then from 32 to 18°C (90 to 64°F).
Is the AMD motor functioning properly?–Go to Step 10Go to”Code 4 –
Air Mix Door
Error”
10Check the coolant hoses for leaks or kinks.
Are the coolant hoses in good condition?–Go to Step 12Go to Step 11
11Repair any problem with the coolant hoses.
Is the heater operating?–System OKGo to Step 12
12Check the surge tank cap.
Is the surge tank cap in good condition?–Go to Step 14Go to Step 13
13Repair or replace the surge tank cap as needed.
Is the heater operating?–System OKGo to Step 14
141. Set the A/C switch to OFF.
2. Set the temperature control to 32°C (90°F).
3. Set the blower motor speed to full high (all seg-
ments illuminated on the display).
4. Remove the surge tank cap.
5. Start the vehicle and run the engine at idle.
6. Watch for the flow of the coolant when the ther-
mostat opens.
Does the coolant flow?–Go to Step 16Go to Step 15