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diagnosed. 1. Connect the scan tool. 2. Ensure the gear selector is in PARK and set the parking brake. 3. Start the engine. 4. Verify that the following scan tool data can be obtained and is functioning properly. Refer to Scan Tool Data List for typical data values. Data that is questionable may indicate a concern. z Engine speed z Transmission output speed z Vehicle speed z TFP manual valve position switch z Transmission range, engine list z Commanded gear, current gear z PC solenoid reference current z PC solenoid actual current z PC solenoid duty cycle z Brake switch z Engine coolant temperature z Transmission fluid temperature z Throttle angle z Ignition voltage z 1-2 shift solenoid z 2-3 shift solenoid z TCC solenoid duty cycle z TCC slip speed 5. Monitor the brake switch signal while depressing and releasing the brake pedal. The scan tool should display: z Closed when the brake pedal is released. z Open when the brake pedal is depressed. 6. Check the garage shifts. 1. Apply the brake pedal and ensure that the parking brake is set. 2. Move the gear selector through the following ranges: 1. PARK to REVERSE 2. REVERSE to NEUTRAL 3. NEUTRAL to DRIVE 3. Pause 2 to 3 seconds in each gear position. 4. Verify the gear engagements are immediate and not harsh.
2004 Hummer H2 2004 TRANSMISSION Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)
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