System Diagnostics (MTC)
WARNING: This page is about a different car, the 2004 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Fault detection is through Diagnostic Trouble Codes (DTCs)
- DTCs are displayed by the DRBIII®.
- DTCs pertaining to the Evaporator Temperature Sensor are stored in the BCM. Diagnostics for these DTCs can be found in the Heating & A/C category of this article.
- Diagnostics for symptoms pertaining to A/C compressor operation can be found in the Heating & A/C category of this article and in the Power-train Diagnostic Procedures article.
- DTCs pertaining to A/C compressor control circuits are stored in the PCM/ECM. Diagnostics for these DTCs can be found in the POWERTRAIN DIAGNOSTIC PROCEDURES article.
- Refer to the Service procedures for additional MTC system diagnosis and testing information.