The fault code system is split into 2 main categories:
- Current fault codes (
FAULT_CODES_1,FAULT_CODES_2) - Stored fault codes (
FAULT_CODES_3,FAULT_CODES_4)
Current fault codes
FAULT_CODES_1
| Bit position | Cause |
|---|---|
| 0 | ? |
| 1 | ECT disconnected |
| 2 | ECT shorted to gnd |
| 3 | TP sensor disconnected / short to pwr |
| 4 | ? |
| 5 | IAT sensor low voltage (high temp.) |
| 6 | ? |
| 7 | IAT sensor high voltage (low temp.) |
FAULT_CODES_2
| Bit position | Cause |
|---|---|
| 0 | MAP sensor short to gnd |
| 1 | MAP sensor disconnected / short to pwr |
| 2 | ? |
| 3 | ? |
| 4 | ? |
| 5 | ? |
| 6 | ? |
| 7 | CMP sensor disconnected |
Stored fault codes
Stored in FAULT_CODES_3 and FAULT_CODES_4.
These store the fault codes that even once appeared in the current fault codes memory. It stores them as a bitwise OR value of bits of current fault codes that appeared.