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Isuzu US-IDSS 2024 Diagnostic is a comprehensive tool for the effective maintenance and repair of Isuzu vehicles. It integrates advanced diagnostic features to assist technicians in identifying and resolving issues promptly. This system supports a wide range of Isuzu models, ensuring compatibility with both US and Canadian specifications. Its capabilities include vehicle recognition, fault code analysis, and real-time data access to streamline the diagnostic process.
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Volvo All Engines (2010 Emissions) Fault Code: SPN 626 FMI 4 PID: 45 Intake Air Heater (IAH) Relay

Volvo All Engines (2010 Emissions) Fault Code: SPN 626 FMI 4 PID: 45 Intake Air Heater (IAH) Relay

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Created by potrace 1.16, written by Peter Selinger 2001-2019 Installation with TeamViewer for free

The preheat Relay controls the preheater from an electric signal from the Engine Control Module (ECM). This function is used to warm up the inlet air during cold conditions. This provides more reliable starting and reduces exhaust emissions during cold starts. Vehicles can be equipped with or without the preheater.

Conditions for diagnostic trouble code (DTC):
1) Output activated
2) Short circuit to battery voltage on A14.EB:25

Observable symptoms
1) Intake air heater (IAH) relay never activated
2) Difficult to start in extreme cold
3) White smoke at cold start

Probable cause
1) Engine wiring harness
2) Connector
3) Intake air heater (IAH) relay

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