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Voltage Monitor – Low Voltage
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 597 PID: P167 SPN: 67 FMI: 1/18 LAMP: Yellow SRT: |
ICON™ has restarted the engine three times in 7 hours due to low battery voltage. |
The engine will run continuously. The ICON™ system will not be disabled. Accessories will not be on. |
 Voltage Monitor Supply Circuit
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Circuit Description
The electronic control module (ECM) receives unswitched battery input through the OEM harness. There are two in-line 15-amp fuses in the unswitched battery wire of the OEM harness to protect the engine harness from overheating. The battery return wires are connected directly to the negative (-) battery post.
Component Location
The ECM is connected to the battery by the OEM harness. This direct link provides a constant power supply for the ECM. The location of the battery will vary with the OEM. Refer to the OEM troubleshooting and repair manual for the battery location.
Shop Talk
Make certain that the ECM unswitched battery supply is coming directly from the battery and not the starter.
The following are possible causes of this fault:
- Undercharged batteries caused by a faulty alternator or regulator
- High-current devices on the vehicle such as refrigerators, citizens band radio amplifiers, numerous exterior lights, or other accessories.
Refer to Troubleshooting Fault Code t05-597
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