|
|
Content .. 1912 1913 1914 1915 ..
ground. Does the red DIAGNOSTIC lamp illuminate? If yes, go to step 15 . If no, go to next step. 14. There is a problem with the J-41450-B. Refer to the manufacturers instructions, how to test the J-41450-B for proper operation. Has the J-41450-B tester been replaced? If yes, go to step 3 . 15. Replace the generator. Refer to Generator Replacement in GENERATORS & REGULATORS . Did you complete the replacement? If yes, go to next step. 16. Operate the vehicle in order to verify the repair. Did you correct the condition? If yes, system OK. If no, go to step 2 . GENERATOR NOISE DIAGNOSIS Diagnostic Aids Noise from a generator may be due to electrical or mechanical noise. Electrical noise (magnetic whine) usually Diagnostic Procedures 1. Test the generator for proper operation using the Generator Tester. Refer to GENERATORS & REGULATORS . Is the generator operating properly? If yes, go to next step. If no, go to step 11 . 2. Start the engine. Verify that the noise can be heard. Turn OFF the engine. Disconnect the 4-way connector from the generator. Start the engine. Listen for the noise. Has the noise stopped? If yes, go to 3. Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement. Is the action complete? If 4. Inspect the generator for a loose pulley and/or pulley nut. Is the generator pulley or pulley nut loose? If yes, go to step 11 . If no, go to next step. 5. Loosen all of the generator mounting bolts. Tighten the generator mounting bolts to specifications and in the proper sequence (if necessary). Refer to Generator Replacement in GENERATORS & 6. Inspect the generator for the following conditions: Strained or stretched electrical connections. Hoses or other vehicle equipment resting on the generator, (which may cause the noise to be transmitted into the 7. Reroute the electrical connections to relieve the tension. Reroute the hoses, etc. away from the generator. Start the engine. Has the noise decreased or stopped? If yes, system OK. If no, go to next step. 8. Inspect the drive belt for proper tension. If yes, go to next step. If no, go to step 10 . 9. Replace the drive belt tensioner. Start the engine. Has the noise decreased or stopped? If yes, system OK. NOTE: The replacement PCM must be programmed.
2004 Hummer H2 2004 STARTING & CHARGING SYSTEMS Starters - H2
|