VCDS
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VAGCOM Block Cheat Sheet
Basics
| 1 | coolant temp | o2 bank1 (right)) | o2 bank2 (left) |
| 2 | load | injection time | maf |
| 3 | maf | throttle angle | timing |
Load and Boost
| 112 | egt b1 | enrichment b1 | egt b2 | enrichment b2 |
| 113 | rpm | load | throttle drive | atmos pressure |
| 114 | uncor spec'd load | spec'd load | actual load | boost valve duty |
| 115 | rpm | load | spec'd boost | actual boost |
| 118 | rpm | iat | boost duty cycle | actual boost |
Timing
| 20: timing correction | 1 | 2 | 3 | 4 |
| 21: timing correction | 5 | 6 | ||
| 22: correction factor | load | 1 | 2 | |
| 23: correction factor | load | 3 | 4 | |
| 24: correction factor | load | 5 | 6 | |
| 26: knock sensor voltage | 1 | 2 | 3 | 4 |
| 27: knock sensor voltage | 5 | 6 |
O2 sensors
| 30: o2s | ctrl op | |||
| 31: o2s v pre(s1)/post(s2) | b1s1 | b1s2 | b2s1 | b2s2 |
| 32: o2s LTFT pre(s1) | idle b1 | part b1 | idle b2 | part b2 |
| neg no's = ECU subtracting fuel (because too rich) | ||||
| pos no's = ECU adding fuel (because too lean) | ||||
| 33: o2s pre(s1) | b1 ctrl | b1 v | b2 ctrl | b2 v |
| 34: o2s aging post(s2) b1 | rpm | egt | time period | status |
| 35: o2s aging post(s2) b2 | rpm | egt | time period | status |
| 36: o2s post(s2) | b1 v supply | b1 status | b2 v supply | b2 status |
| 37: o2s bank1 | load | volt s2 | corr val s1-s2 | status |
| 38: o2s bank2 | load | volt s2 | corr val s1-s2 | status |
| 43: o2s aging pre(s1) b1 | rpm | egt | time period | status |
| 44: o2s aging pre(s1) b2 | rpm | egt | time period | status |
General
| 4 | batt voltage | coolant temp | iat |
| 5 | load | speed | Op condition-idl/prt/fl/dcl/erch |
| 6 | load | iat | alt cor fact |
| 10 | load | throttle drive | ignition time |
| 11 | coolant temp | iat | ignition time |
Misfires
| 14 | load | misfire count | misfire status | |
| 15: misfires | 1 | 2 | 3 | status |
| 16: misfires | 4 | 5 | 6 | status |
| 18: misfires | lowest+speed@ | highest+speed@ | lowest+load@ | highest+load@ |
Throttle
| 60: throt | vcm adapt | |||
| 61: throt | volt | throt drive | op condition | |
| 62: throt | sens 1 | sens 2 | pos | sender 2 |
| 63: throt | pos | duty cycle |
Secondary air injection system
| 77: bank 1 | air mass | rel air mas | diag |
| 78: bank 2 | air mass | rel air mas | diag |
Catalytic convertors
| 46 | cat b1 |
| 47 | cat b2 |
Misc
| 50 | spec'd eng spd | ac idle boost | ac compressor on/off |
| 54 | op condition | throt pos | throt drive |
| 55 | idle | ||
| 56 | idle | ||
| 66 | cruise | ||
| 70 | evap | ||
| 71 | fuel tank |