Code Details
| Display code | Navistar Aware SPN 701 FMI 4 |
|---|---|
| SPN | 701 |
| FMI | 4 |
| OEM code | Navistar / International Aware SPN 701 FMI 4 |
| Manufacturer | Navistar / International |
| System | Aware Vehicle Intelligence / Telematics |
| Component | Analog Input 1 — short to ground |
| Source address | Unknown or not applicable |
| Severity | medium |
| Review status | ai source checked |
| Source confidence | high |
| Last reviewed | 2026-03-26 |
Plain-English Meaning
The Analog Input 1 input on the Aware module is receiving a voltage that is below its configured lower limit and has been below that limit longer than the configured timeout. This indicates either a wiring fault that connects the input to ground, a sensor that has failed with its output stuck at low voltage, or a configuration threshold that is set higher than the sensor's normal minimum output.
Navistar S08312 maps Navistar Aware SPN 701 FMI 4 to Analog Input 1 — voltage below normal or shorted low at (Grey connector, Pin 9). The fault activates when voltage falls below the Analog 1 Short to Ground parameter for longer than the configured Analog 1 Short to Ground Timeout.
Common Symptoms
- Aware Vehicle Intelligence alert active
- Analog Input 1 at (Grey connector, Pin 9) reads near zero or below the sensor's expected minimum in Navistar diagnostic software
Possible Causes
Possible causes may include the items below. The list is not a parts diagnosis.
- Wiring short to chassis ground — harness chafed at a frame member or grounding point
- Sensor connected to the input has failed with output stuck at low voltage or with an internal ground short
- Short to Ground configuration threshold set above the sensor's actual minimum output, causing faults at legitimate low-end readings
- Broken supply wire to the sensor preventing it from producing a valid output voltage
First Checks
- Measure the voltage at (Grey connector, Pin 9) with the Aware module connected — confirm the voltage is genuinely low rather than a configuration issue.
- Review the Aware module configuration for Analog Input 1: confirm the Short to Ground threshold is below the connected sensor's normal minimum output.
- Disconnect the sensor and check whether the low voltage clears — if yes, the sensor or its wiring is the source.
- Inspect the harness from the Aware connector to the sensor for any chafing or contact with chassis ground.
Can I Keep Driving?
Severity depends on active status, warning lamps, affected system, and related codes. Stop safely for red stop lamps, brake warnings, oil pressure warnings, high coolant temperature warnings, severe derate, or any abnormal vehicle-control concern.
Related Lookup Pages
Sources
- Navistar Aware Vehicle Intelligence Diagnostic Trouble Codes S08312 Navistar / International Truck Body Builder · oem · accessed 2026-05-05 · confidence high
Source: Navistar / International Truck Body Builder, Navistar Aware Vehicle Intelligence Diagnostic Trouble Codes S08312. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - Navistar Engine Diagnostic Trouble Code Body Builder References Navistar / International Truck Body Builder · oem · accessed 2026-05-05 · confidence medium
Source: Navistar / International Truck Body Builder, Navistar Engine Diagnostic Trouble Code Body Builder References. This page paraphrases factual fields only and is not a substitute for the original document.
Open source
FAQ
How do I determine if Navistar Aware SPN 701 FMI 4 is a wiring fault or a configuration issue?
Measure the voltage at the input pin in real-time and compare it to the connected sensor's specified output range. If the voltage is within the sensor's normal range and the fault is still setting, the Short to Ground threshold in the Aware configuration is too high for this sensor. If the voltage is genuinely low, the fault is in the sensor or wiring.
Can an open sensor supply wire cause Navistar Aware SPN 701 FMI 4?
Yes. If the sensor connected to this input requires a supply voltage (Vref or battery) to produce its output, a break in the supply wire will cause the sensor to output zero or near-zero voltage. The Aware module will see this as a short-to-ground condition if the reading falls below the configured threshold.
Is Navistar Aware SPN 701 FMI 4 specific to one input or could multiple inputs be affected?
Each analog input has its own independent Short to Ground monitoring. If multiple inputs are showing the same condition, a common fault — such as a shared Vref supply issue or a chassis ground that is affecting multiple circuits — is more likely than individual sensor failures on each input.