5A86

5A86 - P1920

Information saved in
GS

Fault code
5A86 - P1920

Fault text
DKG: Temperature value TC1766: incorrect plausibilization

Fault description
Transmission Fluid Temperature Sensor 'C' Circuit
Range/Performance

Condition for fault identification
Test condition:
always
Terminal condition: Terminal 15 ON
Voltage condition:
UBat > 10V

Condition for fault memory entry
Internal diagnosis : dia_c_sg_debounce_temp
ECU fault memory debounce time: Immediate

Action in service
1st step: Read out frequency counter If fault is sporadic:
Delete fault
1st step: Case 1: Frequency = 1, fault is not active
1st step: Case 2: Frequency > 1 or fault active continuously
2nd step: => STATUS_ROHWERTE_LESEN
[STAT_SG_TEMPERATUR_WERT,
STAT_TEMPERATURSENSOR_1_WERT,
STAT_TEMPERATURSENSOR_2_WERT]
Compare the data
Tolerance range:
Difference between ECU temperature and sensor
temperature max. 20 °C, between temperature sensors max.
10 °C
2nd step: Case 1: Temperature data OK 3rd step: Delete
diagnostic fault code
2nd step: Case 2: Temperature data not OK or diagnostic
fault code 0x5A70 and/or 0x5A71 also logged at same
milage 3rd step: Defective temperature sensor(s)
Replace E-module

Fault effect and breakdown warning
none

Driver information
Warning light:
ID 365/ 'Transmission malfunction! Drive gently'
Limp-home mode:
Clutch circuit 2 disabled

Service instruction
none