This condition is typically temperature too high from the turbo outlet. 91.3.1 Turbocharger Check Check as follows: 1. Inspect the turbocharger outlet plumbing and charge…

This condition is typically a short circuit. 91.2.1 Short Circuit Check Check as follows: 1. Disconnect the TCO Sensor. 2. Disconnect the 120–pin MCM connector.…

91.1 SPN 2629/FMI 3 This condition is typically open circuit or short to power. 91.1.1 Open Circuit/Short to Power Check Check as follows: 1. Turn…

90.1 SPN 2623/FMI 4 This fault is typically the PWM Accelerator Pedal J1939 GAS2 signal is missing. 90.1.1 Missing PWM Accelerator Pedal GAS2 Signal Check…

89.1 SPN 1845/FMI 9 This fault is typically the J1939 TCFG2 message is missing. 89.1.1 Missing TCFG2 Message Check Check as follows: 1. Check for…

88.1 SPN 1716/FMI 9 This fault is typically the J1939 ERC1 message is missing. 88.1.1 Missing ERC1 Message Check Check as follows: 1. Check for…

This diagnosis is typically the difference between intake manifold temperature dand EGR temperature is less than threshold (low box). 87.5.1 Temperature Difference Check Check as…

This diagnosis is typically intake manifold temperature drift (high box). 87.4.1 Intake Manifold Sensor Check Check as follows: 1. Disconnect the Intake Manifold Temperature Sensor.…

This diagnosis is typically intake manifold temperature drift (low box). 87.3.1 Intake Manifold Sensor Check Check as follows: 1. Disconnect the Intake Manifold Temperature Sensor.…

A typical diagnosis is IAT Sensor Short to Ground. 87.2.1 Intake Air Temperature Sensor Short to Ground Check Perform the following steps to troubleshoot an…