Battery
The battery is a 12-volt DC source connected in a negative ground system. The battery case is sealed with 2 vents to release gases. The battery has 3 main functions
- Engine cranking power source
- Voltage stabilizer for the electrical system
- Temporary power source when the electrical loads exceed the generator output current
Refer to BATTERY, MOUNTING AND CABLES article.
Special Tools Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent SABRE Premium Battery and Electrical System Tester 010-00736 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
Scheme 13
Battery Positive Output (B+) Terminal Circuit 30-BA6 (RD)
The generator output voltage is supplied to the battery and electrical system through the B+ terminal circuit 30-BA6 (RD) on the rear of the generator.
A Circuit 30-BA10 (RD)
This is the A terminal battery voltage sense circuit and is used to sense the battery voltage.
Circuit 4-EB6 (GY)
The GEN MON circuit communicates the generator load and error conditions to the PCM.
Circuit 5-EB6 (BU)
The GEN COM circuit is used by the PCM to determine the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator on the GEN COM circuit.
Generator On-Vehicle Tests
| CAUTION | To prevent damage to the generator, do not make the jumper wire connections except as directed. |
| CAUTION | Do not allow any metal object to come in contact with the housing and the internal diode cooling fins with the key in the ON or OFF positions. A short circuit may result and burn out the diodes. |
Note. Battery posts and cable clamps must be clean and tight for accurate meter indications.
Note. Refer to the battery tester manual for complete directions for testing the charging system.
- Turn off all of the lamps and the electrical components.
- Place the transmission in NEUTRAL and apply the parking brake.
- Carry out the Load Test and No Load Test according to the following component tests