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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 168 (CONTINUOUSLY VARIABLE TRANSMISSION (CVT))PRESSURE TEST
2008 Chevrolet HHR LT, 2.4 P, Automatic
Pressure Test
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Pressure Test
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools Required
- A/T High Pressure Gauge 07AAJ-PLYA100
- A/T Pressure Hose, 2,210 mm 07MAJ-PY4011A
- A/T Pressure Adapter 07MAJ-PY40120
- A/T Oil Pressure Gauge Set 07406-0020401 or 07406-0020400
- A/T Low Pressure Gauge w/Panel 07406-0070301
NOTE:
- Do not test pressure for more than 10 seconds at a time.
- Do not move the shift lever while raising the engine speed.
- Disable the VSA by pressing the VSA OFF button (if equipped).
- ABS or VSA DTC(s) may come on during the test-drive. If the ABS or VSA DTC(s) come on, clear the DTC(s) with the HDS.
- Make sure the transmission fluid is filled to the proper level (see CVT FLUID LEVEL CHECK ).
- Raise the vehicle on a lift, or apply the parking brake, block the rear wheels, and raise the front of the vehicle. Make sure it is securely supported, and allow the front wheels to rotate freely.
- Remove the splash shield (A) (see SPLASH SHIELD REPLACEMENT ).
- Turn the engine off, and connect the HDS to the DLC (A) located under the driver's side of the dashboard.
- Turn the ignition switch to ON (II).
- Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
- Use the recommended pressure gauge, pressure hose, and pressure hose adapter. Do not allow dust or other foreign particles to enter the holes while connecting the gauges.NOTE:
- Drive pulley pressure and driven pulley pressure may be above 3,430 kPa (35.0 kgf/cm2 , 4,989 psi) when there is a transmission problem that causes the PCM to go into fail-safe mode.
- When troubleshooting, you must use the A/T high pressure gauge to measure drive pulley pressure and driven pulley pressure.
- Connect the A/T oil pressure gauge set to the forward clutch pressure inspection port (B).
- Start the engine, and warm up the engine to normal operating temperature (the radiator fan comes on twice).
- Shift the shift lever to D, and measure the forward clutch pressure at the forward clutch pressure inspection port while firmly pressing the brake pedal, and holding the engine speed at 1,700 rpm.FORWARD CLUTCH PRESSURE SPECIFICATION
Pressure Standard Forward clutch 1,570-1,840 kPa (16.0-18.8 kgf/cm2 , 228-267 psi) - Turn the engine off, then disconnect the pressure gauges from the pressure inspection ports.
- Install the sealing bolts and new sealing washers to the pressure inspection ports, and tighten the bolts to 17 N.m (1.7 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
- If the pressure is out of standard, the problem and probable causes are listed in the table.PROBLEM AND PROBABLE CAUSES CHART
Problem Probable causes No or low forward clutch pressure - Forward clutch defective
- CVTF pump defective
- PH regulator valve defective
- CR valve defective
- Manual valve defective
- Connect the A/T high pressure gauge to the drive pulley pressure inspection port (D). See Fig 3.
- Start the engine, and warm up the engine to normal operating temperature (the radiator fan comes on twice).
- Shift the shift lever to N, and measure the drive pulley pressure at the drive pulley pressure inspection port while firmly pressing the brake pedal, and holding the engine speed at 1,700 rpm.DRIVE PULLEY PRESSURE SPECIFICATION
Pressure Standard Drive pulley 240-540 kPa (2.4-5.5 kgf/cm2 , 34-78 psi) - Turn the engine off, then disconnect the pressure gauges from the pressure inspection ports.
- Install the sealing bolts and new sealing washers to the pressure inspection ports, and tighten the bolts to 17 N.m (1.7 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
- If the pressure is out of standard, the problems and probable causes are listed in the table.PROBLEM AND PROBABLE CAUSES CHART
Problem Probable causes No or low drive pulley pressure - CVTF pump defective
- PH regulator valve defective
- CVTF drive pulley pressure control solenoid valve defective
Drive pulley pressure too high - PH regulator valve defective
- CVT drive pulley pressure control solenoid valve defective
- Connect the A/T high pressure gauge to the driven pulley pressure inspection port (E). See Fig 3.
- Start the engine, and warm up the engine to normal operating temperature (the radiator fan comes on twice).
- Shift the shift lever to N, and measure the driven pulley pressure at the driven pulley pressure inspection port while firmly pressing the brake pedal, and holding the engine speed at 1,700 rpm.DRIVEN PULLEY PRESSURE SPECIFICATION
Pressure Standard Driven pulley 830-1,130 kPa (8.5-11.5 kgf/cm2 , 120-164 psi) - Turn the engine off, then disconnect the pressure gauges from the pressure inspection ports.
- Install the sealing bolts and new sealing washers to the pressure inspection ports, and tighten the bolts to 17 N.m (1.7 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
- If the pressure is out of standard, the problems and probable causes are listed in the table.PROBLEM AND PROBABLE CAUSES CHART
Problem Probable causes No or low driven pulley pressure - CVTF pump defective
- PH regulator valve defective
- CVT driven pulley pressure control solenoid valve defective
Driven pulley pressure too high - PH regulator valve defective
- CVT driven pulley pressure control solenoid valve defective
- Connect the A/T low pressure gauge to the lubrication pressure inspection port (C). See Fig 3.
- Start the engine, and warm up the engine to normal operating temperature (the radiator fan comes on twice).
- Shift the shift lever to N, and measure the lubrication pressure at the lubrication pressure inspection port while firmly pressing the brake pedal, and holding the engine speed at 3,000 rpm.LUBRICATION PRESSURE SPECIFICATION
Pressure Standard Lubrication 250-400 kPa (2.5-4.1 kgf/cm2 , 36-58 psi) - Turn the engine off, then disconnect the pressure gauges from the pressure inspection ports.
- Install the sealing bolts and new sealing washers to the pressure inspection ports, and tighten the bolts to 17 N.m (1.7 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
- If the pressure is out of standard, the problem and probable causes are listed in the table.PROBLEM AND PROBABLE CAUSES CHART
Problem Probable causes No or low lubrication pressure - CVTF pump defective
- Lubrication valve defective
- Inhibitor solenoid defective
- Connect the A/T oil pressure gauge set to the reverse brake pressure inspection port (A). See Fig 3.
- Start the engine, and warm up the engine to normal operating temperature (the radiator fan comes on twice).
- Shift the shift lever to R, and measure the reverse brake pressure at the reverse brake pressure inspection port while firmly pressing the brake pedal, and holding the engine speed at 1,700 rpm.REVERSE BRAKE PRESSURE SPECIFICATION
Pressure Standard Reverse brake 1,570-1,840 kPa (16.0-18.8 kgf/cm2 , 228-267 psi) - Turn the engine off, then and disconnect the pressure gauges from the pressure inspection ports.
- Install the sealing bolts and new sealing washers to the pressure inspection ports, and tighten the bolts to 17 N.m (1.7 kgf.m, 13 lbf.ft). Do not reuse the old sealing washer.
- If the pressure is out of standard, the problem and probable causes are listed in the table.PROBLEM AND PROBABLE CAUSES CHART
Problem Probable causes No or low reverse brake pressure - Reverse brake defective
- Reverse inhibitor valve
- Manual valve defective
- Inhibitor solenoid defective
- CVTF pump defective
- PH regulator valve defective
- CR valve defective
- Check the CVT fluid level (see CVT FLUID LEVEL CHECK ). Refill the transmission with CVTF if necessary.
- Install the splash shield (see SPLASH SHIELD REPLACEMENT ).
Forward Clutch Pressure
Drive Pulley Pressure
Driven pulley pressure
Lubrication Pressure
Reverse Brake Pressure
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.