Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 324 (COMPUTER/INTEGRATING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1440TYPICAL SCAN TOOL DATA
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Typical Scan Tool Data
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Typical Scan Tool Data
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Ignition Off/Run/Crank
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Operating Conditions: Ignition Switch in OFF, w/key out or ACC | ||||
| Off/Run/Crank Voltage | Key Out/ACC | Key Out/ACC | Key Out/ACC | Key In-Off |
| Operating Conditions: Ignition Switch in OFF, w/key in | ||||
| Off/Run/Crank Voltage | Key In-Off | Key Out/ACC | Key Out/ACC | Key In-Off |
| Operating Conditions: Ignition Switch in RUN | ||||
| Off/Run/Crank Voltage | Run | Key Out/ACC | Key Out/ACC | Key In-Off |
| Operating Conditions: Ignition Switch in START | ||||
| Off/Run/Crank Voltage | Crank | Key Out/ACC | Key Out/ACC | Key In-Off |
Off/Run/Crank Signal
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Operating Conditions: Ignition Switch in OFF, w/key out or ACC | ||||
| Off/Run/Crank Voltage | 0 | 0 | 0 | 51 |
| Operating Conditions: Ignition Switch in OFF, w/key in | ||||
| Off/Run/Crank Voltage | 51 | 0 | 0 | 51 |
| Operating Conditions: Ignition Switch in RUN | ||||
| Off/Run/Crank Voltage | 3.5-4.0 | 0 | 0 | 51 |
| Operating Conditions: Ignition Switch in START | ||||
| Off/Run/Crank Voltage | 1-2 | 0 | 0 | 51 |
| 1 The correct value should be B+, but the parameter was scaled to maximum 5 volts, to increase reading accuracy in the lower range. | ||||
Key In Status
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Operating Conditions: Key in ignition switch | ||||
| Off/Run/Crank Voltage | Key In | Key Out | Key Out | Key In |
| Operating Conditions: Key out of ignition switch | ||||
| Off/Run/Crank Voltage | Key Out | Key Out | Key Out | Key In |
Off/Run/Crank Reference
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Ignition Key Resistor Signal | 5 | 0 | 5 | 51 |
| 1 The correct value should be B+, but the parameter was scaled to maximum 5 volts, to increase reading accuracy in the lower range. | ||||
Ignition Run/Crank
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Operating Conditions: Ignition Switch in RUN or START | ||||
| Ignition 1 Voltage | Active | Inactive | Inactive | Active |
| Operating Conditions: Ignition Switch in OFF or ACC | ||||
| Ignition 1 Voltage | Inactive | Inactive | Inactive | Active |
Ignition Accessory/Run
| Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
| Operating Conditions: Ignition Switch in ACC or RUN | ||||
| Accessory Voltage | Active | Inactive | Inactive | Active |
| Operating Conditions: Ignition Switch in OFF or START | ||||
| Accessory Voltage | Inactive | Inactive | Inactive | Active |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.