Note: Cars have an OBD on-board diagnostic system, which can be used to determine the causes of problems in the charging system. IN chapter 6 The diagnostic codes are deciphered and the procedure for reading them from the electronic memory of the on-board computer is described.
1. If a problem occurs in the charging circuit, you should not first assume that the generator is failing. In this case, it is necessary to first carry out a number of the following checks:
- A) Check the condition of the battery cable connections. Make sure the terminals are clean and securely connected to the battery terminals.
- b) Check the density of the electrolyte in the battery banks (inspect the battery charge indicator). If necessary, charge.
- With) Check the condition of the generator wiring and connectors.
- d) Check the condition and tension of the drive belt (see chapter 1).
- e) Make sure that the generator mounting bolts are securely tightened.
- f) Start the engine and check that the generator does not make unusual noise.
2. Without starting the engine, measure the battery output voltage using a voltmeter. The voltage value with a fully charged battery should be in the range of 12.4-12.6 V (see illustration).
9.2. To measure battery voltage. connect the voltmeter electrodes to the battery terminals (engine is off). When measuring voltage, the engine must be running
3. Start the engine and measure the battery voltage again. In this case, the voltage should be higher than the limit given in paragraph 2, but not exceed 14.7 V.
4. If the voltage does not correspond to the specified values, deviating upward or downward, contact a proprietary station to diagnose the charging system.
Note: Many parts stores will inspect the removed alternator. Contact your nearest store that may offer this service.