Transmission Control Module --, 8 SPEED AQ-450-8A 09P (2021 MY): Notes
| Component / System | Fault Code | Monitor Strategy | Malfunction Criteria | Threshold Value | Secondary Parameters | Enable Conditions | Monitor Time Length | Frequency of Checks | MIL Illum.US | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Shift Solenoid | |||||||||||
| S1 | P0973 - Shift Solenoid "A" Control Circuit Low | Conduction check in ON/OFF solenoid. | Comparison of the signal of solenoid monitor and solenoid driver output | Wrong output signal for more than 100 ms | -- | -- | 100 ms 5 times | continuous | 2 DCY | ||
| S1 | P0974 - Shift Solenoid "A" Control Circuit High | ||||||||||
| Pressure Control Solenoid | |||||||||||
| SLT | P0748 - Pressure Control Solenoid "A" Electrical | Linear solenoid feed back current stuck check | Comparison of target current and Feed back current | Sum of difference of two current > 15000 | value m Voltage m Main Solenoid S | < 133 3mA > 10.5 V ON | 2 times | continuous | 2 DCY | ||
| SL5 | P0778 - Pressure Control Solenoid "B" Electrical | ||||||||||
| SL1 | P0798 - Pressure Control Solenoid "C" Electrical | ||||||||||
| SL2 | P2716 - Pressure Control Solenoid "D" Electrical | ||||||||||
| SL3 | P2725 - Pressure Control Solenoid "E" Electrical | ||||||||||
| SL4 | P2734 - Pressure Control Solenoid "F" Electrical | ||||||||||
| SLU | P2759 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical | ||||||||||
| SLT | P0963 - Pressure Control Solenoid "A" Control Circuit High | Input AD value check in every Linear solenoid. | Detection of wrong input AD value | Feedback current > 1333 mA (AD value > 1000) for more than 100 ms | 100 ms 5 times | ||||||
| SL5 | P0777 - Pressure Control Solenoid "B" Stuck On | ||||||||||
| SL1 | P0797 - Pressure Control Solenoid "C" Stuck On | ||||||||||
| SL2 | P2715 - Pressure Control Solenoid "D" Stuck On | ||||||||||
| SL3 | P2724 - Pressure Control Solenoid "E" Stuck On | ||||||||||
| SL4 | P2733 - Pressure Control Solenoid "F" Stuck On | ||||||||||
| SLU | P2758 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Stuck On | ||||||||||
| SLT | P0962 - Pressure Control Solenoid "A" Control Circuit Low | Feedback current < 23 mA (AD value < 15) for more than 100 ms | 100 ms 5 times | ||||||||
| SL5 | P0776 - Pressure Control Solenoid "B" Performance/Stuck Off | ||||||||||
| SL1 | P0796 - Pressure Control Solenoid "C" Performance/Stuck Off | ||||||||||
| SL2 | P2714 - Pressure Control Solenoid "D" Performance/Stuck Off | ||||||||||
| SL3 | P2723 - Pressure Control Solenoid "E" Performance/Stuck Off | ||||||||||
| SL4 | P2732 - Pressure Control Solenoid "F" Performance/Stuck Off | ||||||||||
| SLU | P2757 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off | ||||||||||
Table continues below
| Component / System | Fault Code | Monitor Strategy | Malfunction Criteria | Threshold Value | Secondary Parameters | Enable Conditions | Monitor Time Length | Frequency of Checks | MIL Illum.US | |
|---|---|---|---|---|---|---|---|---|---|---|
| Speed sensor | ||||||||||
| Output speed sensor | P19AB - Output Speed Sensor Intermittent/Circuit Low | Electrical check | Detection of wrong input AD value | Voltage < 0.206 Volt (AD value < 45) for more than 100 ms | Output sensor | Not after failure decision for output sensor "no pulse check" | 100 ms 5 times | continuous | 2 DCY | |
| Output speed sensor | P077D - Output Shaft Speed Sensor Circuit High | Electrical check | Detection of wrong input AD value | Voltage > 2.727 Volt (AD value > 545) for more than 100 ms | Output sensor | Not after failure decision for output sensor "no pulse check" | 100 ms 5 times | continuous | ||
| Output speed sensor | P0721 - Output Shaft Speed Sensor Circuit Range/Performance | No pulse check | Comparison pulse of input revolution and output revolution | No pulse of output sensor during 48 pulses of input sensor | Engine speed | > 400 rpm | 500 ms | continuous | ||
| No emergency mode | ||||||||||
| Gear engagement condition | Engage | |||||||||
| Range | D, S | |||||||||
| Inhibitor switch | No fault | |||||||||
| Input sensor | Active | |||||||||
| S1, SLC1, SLC2, SLC3, SLC4, SLB1, SLT | No fault | |||||||||
| (Input rev. / defined current gear ratio) | >= 300 rpm | |||||||||
| Output sensor | Not during failure detection or after failure decision for output sensor electrical failure. | |||||||||
| Input speed sensor | P19AA - Input/Turbine Speed Sensor Intermittent/Circuit Low | Electrical check | Detection of wrong input AD value | Voltage < 0.206 Volt (AD value < 45) for more than 100 ms | Input sensor | Not after failure decision for input sensor "no pulse check" | 100 ms 5 times | |||
| Input speed sensor | P07C0 - Input/Turbine Shaft Speed Sensor "A" Circuit High | Electrical check | Detection of wrong input AD value | Voltage > 2.727 Volt (AD value < 545) for more than 100 ms | Input sensor | Not after failure decision for input sensor "no pulse check" | 100 ms 5 times | |||
| Input speed sensor | P0716 - Input/Turbine Shaft Speed Sensor "A" Circuit Range/Performance | No pulse check | Comparison pulse of input revolution and output revolution | No pulse of input sensor during 10 pulses of output sensor | Engine speed | > 400 rpm | 500 ms | |||
| Output sensor | Active | |||||||||
| Output speed | >= 300 rpm | |||||||||
| Input sensor | Not during failure detection or after failure decision for input sensor electrical failure. | |||||||||
| Inhibitor switch AQ450-8F | ||||||||||
| Inhibitor switch | P0706 - Transmission Range Sensor "A" Circuit (PRNDL Input) | A, B, C and PA signal check in every shift lever position. | Detection of wrong combination of the A, B, C and PA signal | Wrong combination for more than 350 ms | -- | -- | 350 ms | continuous | 2 DCY | |
| Inhibitor switch | P0709 - Transmission Range Sensor "A" Circuit Intermittent | Detection of no signal of the A, B, C and PA signal | All signals lost | |||||||
Table continues below
| Component / System | Fault Code | Monitor Strategy | Malfunction Criteria | Threshold Value | Secondary Parameters | Enable Conditions | Monitor Time Length | Frequency of Checks | MIL Illum.US | |
|---|---|---|---|---|---|---|---|---|---|---|
| Oil temperature sensor | ||||||||||
| Oil temperature sensor Stuck | P0710 - Transmission Fluid Temperature Sensor "A" Circuit | Electrical check | Detection of wrong input AD value | Measurement block shows Value between 30° C and 150° C and doesn't change this value by 5° during 10 min | -- | -- | 100 ms | continuous | 2 DCY | |
| Oil temperature sensor High Stuck | P0710 - Transmission Fluid Temperature Sensor "A" Circuit | |||||||||
| Oil temperature sensor GND short | P0712 - Transmission Fluid Temperature Sensor "A" Circuit Low | Measurement block shows Value of 200° C | -- | -- | 300s | |||||
| Oil temperature sensor Battery short / open | P0713 - Transmission Fluid Temperature Sensor "A" Circuit High | Measurement block shows Value of -43° C | -- | -- | 12s | |||||
| Micro controller Hardware | ||||||||||
| Flash ROM | P0700 - Transmission Control System (MIL Request) | ROM area check | Comparison of stored check sum value and calculated checksum | Two checksum values are not the same. | -- | -- | 40 s | continuous | 2 DCY | |
| EEPROM | P0700 - Transmission Control System (MIL Request) | ROM area check | Comparison of writing data and reading data. | Writing data is different from reading one. | ||||||
| Random Access Memory | P0700 - Transmission Control System (MIL Request) | RAM area check | Comparison of writing data and reading data. | Writing data is different from reading one. | -- | -- | ||||
| Functional Safety | ||||||||||
| Safety function | P2711 - Unexpected Mechanical Gear Disengagement | To check solenoid state | Check of solenoid state pattern and input torque | to detect braking torque > 1948 Nm | -- | -- | 700 ms | continuous | 2DCY | |
| Software flow control | P0613 - TCM Processor | TCM program miscalculation | To detect TCM program flow problem | CPU core check ROM check RAM data protection Program flow check Safe state activation check | -- | -- | 200 ms | |||
| Saftety processor | 2nd CPU detects miscalculation | Check-calculation of 1st CPU failed | Single reset does not cover problem | -- | -- | 5 s | ||||
Table continues below
| Component / System | Fault Code | Monitor Strategy | Malfunction Criteria | Threshold Value | Secondary Parameters | Enable Conditions | Monitor Time Length | Frequency of Checks | MIL Illum.US | |
|---|---|---|---|---|---|---|---|---|---|---|
| CAN | ||||||||||
| Bus off | U0001 - High Speed CAN Communication Bus | CAN communication check | Detection of communication error | CAN BUS off condition for more than 250 ms | ignition on | > 500 ms | 250 ms | continuous | 2 DCY | |
| ECU no communication (640h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (0A7h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (0A8h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (3BEh) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (121h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (641h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU no communication (391h) (MQB CAN) | U0100 - Lost Communication With ECM/PCM "A" | CAN communication check | Detection of communication error | ECU no communication for more than 50 ms | CAN bus | Active | 500 ms | |||
| ignition on | > 500 ms | |||||||||
| ECU malfunction (0A7h) (MQBCAN) | U0401 - Invalid Data Received From ECM/PCM "A" | CAN receive data check | ECU signal data freeze | Data counter not updated | CAN bus ECU communication | Active Active | 250 ms | |||
| ECU malfunction (0A8h) (MQBCAN) | U0401 - Invalid Data Received From ECM/PCM "A" | CAN receive data check | ECU signal data freeze | Data counter not updated | CAN bus ECU communication | Active Active | 250 ms | |||
| ECU malfunction (121h) (MQBCAN) | U0401 - Invalid Data Received From ECM/PCM "A" | CAN receive data check | ECU signal data freeze | Data counter not updated | CAN bus ECU communication | Active Active | 250 ms | |||
| ECU malfunction (641h) (MQBCAN) | U0401 - Invalid Data Received From ECM/PCM "A" | CAN receive data check | ECU signal data freeze | Data counter not updated | CAN bus ECU communication | Active Active | 250 ms | |||
| Accelerator pedal | U0401 - Invalid Data Received From ECM/PCM "A" | CAN receive data check | Detection of error signal | 0xFF | CAN bus ECU communication ECU data update | Active Active Active | 250 ms | |||
| ECU wrong level (MQB CAN) | U0301 - Software Incompatibility With ECM/PCM | CAN receive data check | Detection of error signal | Transmission coding is manual transmission code (0Fh) OrQ7: Max torque is not same as one in ATCU Touareg: MO_Code is not same as one in ATCU or MO_Leistung is not same as one in ATCU | ||||||
| Functional lock up control | ||||||||||
| Lock up control | P0741 - Torque Converter Clutch Circuit Performance/Stuck Off | OFF stuck check. | Comparison of engine rpm and input rpm | Engine rpm - input rpm > -100 rpm for 2s (hybrid only) Engine rpm - input rpm > 100 rpm for 2s | Engine speed Shift Lever Estimated engine torque Revolution sensor SLU target current Model oil temp. Common parameter (Footnote: ) | > 400 rpm < 4000 rpm D or S >= 0 Nm No back up condition > 1000 mA >= 20° C common condition (Footnote: ) | 2 s 6 times | continuous | 2 DCY | |
Table continues below
| Component / System | Fault Code | Monitor Strategy | Malfunction Criteria | Threshold Value | Secondary Parameters | Enable Conditions | Monitor Time Length | Frequency of Checks | MIL Illum.US | |
|---|---|---|---|---|---|---|---|---|---|---|
| Gear ratio error | ||||||||||
| 1st gear | P0731 - Gear 1 Incorrect Ratio | Input and output rpm signal check. Separate error memory for each gear. | Comparison of indicated slip and actual slip with stored values | abs (input rev. - output rev. x other gear ratio) < (0.04 x other gear ratio x output rev.) for more than 1 s Slip differences > (0.20 x current gear ratio x output rev.) for more than 1 s | Engine speed Output rev. Shift Lever Brake slip difference of output speed (In case ABS valid) Revolution sensor Model oil temp. Common parameter (Footnote: ) | > 400 rpm > 250 rpm D or S off difference < 10% No back up condition >= 20° C common condition (Footnote: ) | 1 s 12 times cumulative | continuous | 2 DCY | |
| 2nd gear | P0732 - Gear 2 Incorrect Ratio | |||||||||
| 3rd gear | P0733 - Gear 3 Incorrect Ratio | |||||||||
| 4th gear | P0734 - Gear 4 Incorrect Ratio | |||||||||
| 5th gear | P0735 - Gear 5 Incorrect Ratio | |||||||||
| 6th gear | P0729 - Gear 6 Incorrect Ratio | |||||||||
| 7th gear | P076F - Gear 7 Incorrect Ratio | |||||||||
| 8th gear | P07D9 - Gear 8 Incorrect Ratio | |||||||||