Transmission Control Module --, 8 SPEED AQ-450-8A/F 09P (2022 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	2 DCY
S1	P0974 - Shift Solenoid "A" Control Circuit High
Pressure Control Solenoid
SLT	P0748 - Pressure Control Solenoid "A" Electrical	Linear solenoid feedback current stuck check	Comparison of target current and Feedback current	Sum of difference of two current > 15000	Input AD value Voltage Main Solenoid Switch	< 1333 mA > 10.5 V ON	2 times	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

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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	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
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	500ms
								No emergency mode
					Garage shifting			None
					Time after garage shifting			>= T_GarageFin
					Neutral control			None
					Time after Neutral control			>= T_NConFin
					Shifting			None
					Time after shifting			>= T_ShiftFin
					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.

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Component / System	Fault Code	Monitor Strategy	Malfunction Criteria	Threshold Value	Secondary Parameters	Enable Conditions	Monitor Time Length / Frequency of Checks	MIL Illum. US
Inhibitor switch AQ450-8F
Inhibitor switch	P0706 - Transmission Range Sensor "A" Circuit Range/Performance	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	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
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 smaller than 30° C and doesn't change this value by 1° C	oil temp.	-55° C to 200° C	15 min	2 DCY
					Engine speed			> 400 rpm
					Range			D, S, R
Oil temperature sensor High Stuck	P0710 - Transmission Fluid Temperature Sensor "A" Circuit	Measurement block shows Value > 120° C			EG coolant temp. was after EG coolant temp. was	> 50° C for 10 s < 45° C for 10 s	10 ms
Oil temperature sensor GND short	P0712 - Transmission Fluid Temperature Sensor "A" Circuit Low	Measurement block shows Value of 200° C			--	--	5 s
Oil temperature sensor Battery short / open	P0713 - Transmission Fluid Temperature Sensor "A" Circuit High	Measurement block shows Value of -55° C			--	--	10 s
Microcontroller Hardware
Flash ROM	P0700 - Transmission Control System (MIL Request)	ROM area check	Comparison of stored checksum value and calculated checksum	Two checksum values are not the same.	--	--	40 s	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	2 DCY
Wrong gear select detection (by New Gear)	P0613 - TCM Processor	To check target gear	Detection of wrong target gear	target gear < allowed lowest gear	--	--	150 ms
Wrong gear select detection (by Solenoid Gear)	To check solenoid state		Detection of wrong solenoid state pattern	gear judged from solenoid pattern < allowed lowest gear	--	--	150 ms
Wrong gear select detection (by suddenly downshift)	To check solenoid state		Detection of suddenly downshift with solenoid state pattern	gear change judged from solenoid pattern in 100 ms < allowed lowest gear	--	--	100 ms
Wrong gear select detection (by Engine PRM)	To check engine speed		Detection of engine over revolution	engine speed > over revolution value x 1.05	--	--	150 ms
CPU core check	Input Other Rationality check		To detect a CPU processing error	Abnormal CPU processing is detected by using a micro controller function	Ignition	ON	1 Time
ROM check	Input Other Rationality check		To detect an error about the ROM	ROM error is detected by using the micro controller functions and software function.	Ignition	ON	1 Time
RAM data protection	Input Other Rationality check		To check detect about the RAM	ROM error is detected by using the micro controller functions and software functions.	Ignition	ON	1 Time
Communication data check	Input Other Rationality check		To detect the error by checking the communication between Central Processing Unit (CPU) and Peripheral Control Unit (PCU)	Error is detected by checking the communication between CPU and PCU.	Ignition	ON	1 Time
Program flow check	Input Other Rationality for TCM program miscalculation check		To detect TCM program flow problem	Comparison of processing address and pre-defined address.	Ignition	ON	1 Time
Safe state shift check	Input Other Rationality check		To check the Solenoid cut monitor when Solenoid cut drive outputs "ON" signal	Solenoid cut monitor = OFF	Ignition	ON -> OFF	1 Time

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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	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
					> 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 2 s (hybrid only) Engine rpm - input rpm > 100 rpm for 2s	Engine speed	> 400 rpm < 4000 rpm	2 s 6 times	2 DCY
					Shift Lever			D or S
					Time after above shift lever condition			>= 8000 ms
					Estimated engine torque			>= 0 Nm
					Revolution sensor			No back up condition
					SLU target current			>= 1000 mA
					Time after above SLU target current condition			>= Time_SLU_Full
					Common parameter (see footnote Footnote: )			common condition (see footnote Footnote: )

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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) < GE rev 1 for 500 ms or abs (input rev. - output rev. x expected gear ratio) > GE rev 2 for 1 s	Engine speed	> 400 rpm	500 ms or 1 s 5 times cumulative	2 DCY
			2nd gear	P0732 - Gear 2 Incorrect Ratio	Output rev.			> 60 rpm
			3rd gear	P0733 - Gear 3 Incorrect Ratio	Shift Lever			D or S
			4th gear	P0734 - Gear 4 Incorrect Ratio	Revolution sensor			No back up condition
			5th gear	P0735 - Gear 5 Incorrect Ratio	Common parameter (see footnote Footnote: )			common condition (see footnote Footnote: )
6th gear	P0729 - Gear 6 Incorrect Ratio
7th gear	P076F - Gear 7 Incorrect Ratio
8th gear	P07D9 - Gear 8 Incorrect Ratio