Self-Diagnostic System
Standard Body Module (SBM) is equipped with a self-diagnostic system, which detects system Diagnostic Trouble Codes (DTCs) or abnormalities. When a malfunction occurs, SBM will store a DTC. See SBM DTC DEFINITIONS table. Malfunctions are recorded as history/intermittent failures or as current failures. If a DTC occurs and then no longer exists, some DTCs will remain current until first ignition cycle. Other DTCs will become history when fault condition no longer exists.
A scan tool can be used to retrieve and clear DTCs. Scan tool also has several features that can be used to help locate an intermittent condition. When scan tool is used for system tests, it will display values actually seen or commanded by various systems (i.e., PCM, instrument cluster). This will usually include the following types of information:
- Analog Data Input
Displays analog input seen by system. - Inputs/Outputs
Displays digital values as seen by system, and provides indication of whether input or output has cycled. - Special Functions (Output Controls)
Allows for outputs of system to be set at a desired value (ON or OFF). - Clear Codes
Will erase DTCs for system currently selected (if problem still exists in system, DTC may immediately reset).
| DTC (1) | Description | ||
|---|---|---|---|
| B0802 | BTSI Shorted To Ground | ||
| B0803 | BTSI Shorted To Battery Voltage | ||
| B0807 | Inadvertent Power Shorted To Ground | ||
| B1656 | EEPROM Write Error | ||
| B1658 | EEPROM Checksum Error | ||
| B1982 | Battery Power Voltage Too High | ||
| B1983 | Battery Power Voltage Too Low | ||
| B2348 | Heated Seat Disable (Short To Ground) | ||
| B2452 | Theater Dim 1 (Short to Ground Or Open) | ||
| B2453 | Theater Dim 1 (Short To Battery Voltage) | ||
| B2457 | Theater Dim 2 (Short To Ground Or Open) | ||
| B2458 | Theater Dim 2 (Short To Battery Voltage) | ||
| U1000 | Class 2 Communication Malfunction | ||
| U1016 | Loss Of Serial Communications With PCM | ||
| U1040 | Loss Of Serial Communications With EBTCM | ||
| U1088 | Loss Of Serial Communications With SDM | ||
| U1096 | Loss Of Serial Communications With IPC | ||
| U1144 | Loss Of Serial Communications With Cellular Phone | ||
| U1152 | Loss Of Serial Communications With HVAC Programmer | ||
| U1160 | Loss Of Serial Communications With DDM | ||
| U1161 | Loss Of Serial Communications With PDM | ||
| U1162 | Loss Of Serial Communications With Rear DDM | ||
| U1166 | Loss Of Serial Communications With SCM | ||
| U1170 | Loss Of Serial Communications With Driver's Door Switch | ||
| U1176 | Loss Of Serial Communications With RFA | ||
| U1192 | Loss Of Serial Communications With Theft Deterrent Module | ||
| U1255 | Class 2 Initialization Error | ||
| U1300 | Class 2 Short To Ground | ||
| U1301 | Class 2 Short To Battery Voltage | ||
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