Section 14.2
Troubleshooting PID 168
The following procedures will troubleshoot PID 168.
Section 14.2.1
168 03 – Battery Voltage High Fault
Perform the following steps to troubleshoot a battery voltage high fault:
- Measure battery voltage with the engine running at maximum rpm.
- If greater than 14.5 volts, check for proper alternator operation and repair or replace, as required.
- Erase fault code memory.
Section 14.2.2
168 04 – Battery Voltage Low Fault
Perform the following steps to troubleshoot a battery voltage low fault:
- Check the condition of the alternator drive belt and replace, if required.
- If fault is no longer active, erase fault code memory.
- If fault is still active, go to step 2 .
- Check for loose alternator mounting and retighten or repair, as required.
- If fault is no longer active, erase fault code memory.
- If fault is still active, go to step 3 .
- Check for proper alternator operation and repair or replace, as required.
- If fault is no longer active, erase fault code memory.
- If fault is still active, go to step 4 .
- Check the condition of the battery (does it hold the charge?) and replace, if required.
- If fault is no longer active, erase fault code memory.
- If fault is still active, go to step 5 .
- Measure the resistance of the individual wires in the ground circuit.
- If resistance is greater than 0.5 Ω in any wire, repair or replace the wire and connector. Erase fault code memory.
- If resistance is less than 0.5 Ω in all wires, go to step 6 .
- Measure the resistance of the individual wires in the power circuit with the engine running and battery voltage greater than 12.5 V.
- If resistance is greater than 0.5 Ω in any wire, repair or replace the power circuit wires and connector. Erase fault code memory.
- If resistance is less than 0.5 Ω in any wire, go to step 7 .
- Measure the current drop of the individual wires in the ground circuit.
- If the current drop is more than 0.2 volts in any wire, repair or replace the ground circuit wires and connector. Erase fault code memory.
- If the current drop is less than 0.2 volts in any wire, go to step 8 .
- Measure the current drop of the individual wires in the power circuit.
- If the current drop is more than 0.2 volts in any wire, repair or replace the power circuit wires and connector. Erase fault code memory.
MBE 900/4000 Troubleshooting Guide - 6SE422 |
Generated on 10-13-2008 |