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
-
CAT Engine Reprogramming Tool for flash programming C1.8, C2.4, C3.8 & C3.3B + Guide
CAT $50.00Rated 0 out of 5 -
DAF Davie Runtime v5.6.1 Davie XDc ll [02.2019] + Expire Fix 302.00 Unlock ( Windows 7 )
DAF $70.00Rated 0 out of 5 -
JPRO 2022 v1 Commercial Vehicle Diagnostics V1 Software Download & Installation Service ( 1 PC )
JPRO $94.00Rated 0 out of 5 -
Navistar international OnCommand service information 2018 software trucks
Navistar $50.00Rated 0 out of 5
Related products
-
Allison 1000 & 2000 Gen 5 Fault Code:P2671 Actuator Supply Voltage 2 (HSD2) – High (Batt)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2763 TCC PCS Control Circuit High
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P1891 Throttle Position Sensor (TPS) PWM Signal – Low Input
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P0980 Shift Solenoid 3 (SS3) Control Circuit – High
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2724 Pressure Control Solenoid 1 (PCS1) – Stuck On
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2684 Actuator Supply Circuit Voltage 3 Open (HSD3)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P1790 Gear Shift Module 1 Calibration Invalid
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P0973 Shift Solenoid 1 (SS1) Control Circuit – Low
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2686 Actuator Supply Circuit Voltage 3 High (HSD3)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2730 Pressure Control Solenoid 1 (PCS1) Control Circuit – High
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:U0074 CAN Communications BUS 2 Off
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2764 TCC PCS Control Circuit Low
1000 & 2000 Gen 5Rated 0 out of 5
-
Volvo All Engines (2017 Emissions) Fault Code: P113B64 PID: EMS Turbo Compound Buffer Air Pressure Sensor
All Engines (2017 Emissions)Rated 0 out of 5 -
CAT 3126B Fault Code: 252-11 PID: Flash Code 59 SPN: 631 FMI: 11 Incorrect Engine Software
3126BRated 0 out of 5 -
Volvo All Engines (2013 Emissions) Fault Code: P206A12 PID: ACM Reductant Injection Air Pressure Control Valve Control
All Engines (2013 Emissions)Rated 0 out of 5 -
Volvo Engine D12D AE E3 (Tier 3) Fault Code: PID105 FMI 4 Intake Manifold Temperature
D12D AE E3 (Tier 3)Rated 0 out of 5 -
Detroit DD16 EPA07 (2007-09) Fault Code: SPN 647 FMI 5 (MCM) Fan Open Circuit
DD16 EPA07 (2007-09)Rated 0 out of 5 -
Detroit DD16 GHG14 (2014-16) Fault Code: SPN 520323 FMI 4 (ACM) High Side Digital Output Circuit Failed Low
DD16 GHG14 (2014-16)Rated 0 out of 5 -
Volvo All Engines (2004 Emissions) Fault Code: SID 1 FMI 12 Injector Unit #1
All Engines (2004 Emissions)Rated 0 out of 5 -
Detroit DD15 EPA10 (2010-13) Fault Code: SPN 132 FMI 1 (MCM) Air Mass Flow Too Low
DD15 EPA10 (2010-13)Rated 0 out of 5 -
Volvo All Engines (2010 Emissions) Fault Code: SPN 4813 FMI 3 PID: PSID 72 Engine Oil Thermostat Bypass Valve Opening
All Engines (2010 Emissions)Rated 0 out of 5 -
Allison 3000 & 4000 Gen 4 Fault Code: P0717 Turbine Speed Sensor Circuit No Signal
3000 & 4000 Gen 4Rated 0 out of 5