Control unit reset


		General

		Fault types

		Remedial measures

		See also:

General

The main computer has detected an incorrect condition and restarted the control unit. This usually occurs in connection with a message of the safety computer.

Should this fault reoccur, please inform the VOITH customer service. The following numbers provide information on the reported condition.

Fault types

For a caption of the remedial measures, see below.


Code	Fault type	Remedy no.
0011_h	Incorrect interrupt level when calling task	1
0021_h	Incorrect AD channel requested	1
0022_h	AD converter and/or PEC transfer faulty	1
0041_h	Undefined "switch"	1
0051_h	Undefined "switch ngang"	1
0061_h	Timer load register VARIO1 defective	2
0062_h	Timer load register VARIO2 defective	2
0071_h	Undefined "switch ngang"	1
0081_h	Incorrect interrupt level when calling task	1
0091_h	Both copied blocks in RAM are invalid (EEPROM)	2
0092_h	Both copied blocks in RAM are invalid (EEPROM)	2
00A1_h	Incorrect next gear (!=1) for ANS	1
00B1_h	Incorrect next gear (!=1) for EK inhibit	1
00C1_h	Undefined "switch ngang"	1
00D1_h	Main program has exited infinite loop	1
00D2_h	Internal RAM in the 80C166 is defective	2
00D3_h	Invalid dataset in the EEPROM	1, 2
00E0_h	Invalid command code	1, 2
00E1_h	Invalid command code with protected command	1, 2
00E2_h	Word access to odd address	1, 2
00E3_h	Command code branch to odd address	1, 2
00E4_h	Illegal access to unconfigured external bus	1, 2
00F1_h	Incorrect interrupt level when calling task	1
0101_h	Undefined "switch" in operating mode	1
0103_h	Incorrect interrupt level when calling task	1
0104_h	PEC reload interrupt no longer arrives	1, 2
0105_h	dS shut-down by safety computer (sequential fault)	3
0106_h	Faulted communication of control unit <>safety computer	2
0111_h	RAM pointer at EEPROM copy to wrong address	1
0113_h	RAM pointer at EEPROM copy to wrong address	1
0121_h	Incorrect interrupt level when calling task	1
0151_h	RAM test pointer points to wrong address	1
0152_h	External RAM is defective!	2
0153_h	RAM test pointer points to wrong address	1
0154_h	External RAM is defective!	2
0155_h	RAM test pointer points to wrong address	1
0156_h	Fault during XRAM test	2
0161_h	Brake > 6; this brake step does not exist.	1
0171_h	Shift in progress on rwg_neut() call	1
0181_h	No shift, but EK, HLM or FSZM	1
01A1_h	Undefined switch (Irwg_gang)	1
01B1_h	Undefined switch (Irwg_gang)	1
01C1_h	Undefined switch (gang)	1
01D1_h	Incorrect interrupt level when calling task	1
01E1_h	Fault during parameter transfer	1
01F1_h	Undefined switch (sende_index)	1
01F2_h	Undefined switch (sende_index)	1
0201_h	No shift, but SV, HLM, FSZM, NLM active	1
0211_h	System stack overflow	1
0221_h	System stack underflow	1
0231_h	Incorrect vario no. received as parameter	1
0232_h	Incorrect controller no. received as parameter	1
0233_h	Control logic fault in VARIO1	2
0234_h	Control logic fault in VARIO2	2
0235_h	VARIO1: DA channel update time exceeded	2
0236_h	VARIO2: DA channel update time exceeded	2
0237_h	Undefined parameter on threshold change	1
0241_h	RAM cell we_port is defective	2
0291_h	Shift from 4th gear and not into 3rd gear	1
02A1_h	Watchdog timer defective!	2
02B1_h	Undefined switch (bremse)	1
02C1_h	Incorrect interrupt level when calling task	1
02D1_h	Undefined "switch ngang"	1
02F1_h	Preparation for system stack test	1
02F2_h	Preparation for user stack test	1
0301_h	System stack test	1
0302_h	User stack test	1
0303_h	User stack test	1
0320_h	Watchdog timer defective!	2
0340_h	resetMode undefined during sysinit	1
0350_h	Fault during test of Flash-EPROM	2
0360_h	PWM brake request calculation locked at SR	1, 2
0361_h	SR communication during sysinit faulty	2
0362_h	Mechanical fault or undervoltage at the dS relay during initialization of the control unit (tested by SR)	4
0370_h	Dataset does not match the control unit (no WE ECU)	5
0380_h	Dataset fault: multiple signal-pin assignment	5
0400_h	Dataset too short for current software	5
0401_h	Both DS blocks in dataset invalid	1, 2
0403_h	Failure copying from EEPROM to RAM	2
0410_h	U(ref) for ADC outside 4.6 ... 5.4 V	2
0420_h	IGRs not calibrated	2
0430_h	Dataset fault shift program	5
0431_h	Dataset fault shift program	5
0432_h	Dataset fault shift program	5
0433_h	Dataset fault shift program	5
0434_h	Dataset fault: inadmissible tyre radius	5
0435_h	Dataset fault: inadmissible axle ratio	5
0440_h	Mechanical blocking of RBK or RBG	6
0DDD_h	Unprovoked watchdog overflow	1

Remedial measures


Remedy no.	Description
1	Indication of a software fault. The fault can appear like a software fault but it may also be caused by a defective component in the transmission control unit. If possible, use the control unit of an identical vehicle of the fleet and check if the fault still exists.
2	Indication of a defective component in the transmission control unit. Replace the control unit.
3	Consecutive fault of a shut-down by the safety computer. The fault memory should contain further faults - also those reported by the safety computer. See page "Safety computer messages".
4	The safety computer has detected a fault during the test of the dS relay. Check if the relay switches mechanically. Check the relay for pass and correct resistance of the coil. Check the control leads and connected solenoid valve voltage for intactness. Install a new relay.
5	Indication of a dataset in the transmission control unit not matching the application. Analyse and write down the responses / malfunction of the vehicle as exactly as possible. Request a new dataset from Voith Turbo. Hold the data of the transmission control unit ready for this.
6	Indication of a permanent blocking at the output. Check the control block for blocking pistons / soiled oil channels. Disassemble the transmission at the output in accordance with the repair manual and find out the cause of the fault.