AD27.19-S-3003A | Automatic transmission (AGN) diagnosis, function check | 24.3.97 |
ENGINE 601.970, 111.948 /978 in MODEL 638 with CODE (G40) Automatic transmission
Automatic transmission (AGN) diagnosis, advanced information | |||
| Emergency running mode functions, automatic transmission (AGN), | ||
Function check | |||
Scope of test | Operation/requirement | Specified value | Possible cause/remedy |
1 Transmission fault lamp | Ignition ON | Fault lamp illuminates for approx. 2 seconds after ignition is switched on | |
2 Selector lever position | Ignition ON Operate brake pedal Shift through all selector lever positions Check selector lever position using actual value 08 in HHT | ||
3 Kickdown switch | Ignition ON Operate accelerator pedal using actual value 04 in the HHT until the value 100% is displayed. Pressure point must be clearly detectable. Depress accelerator pedal and check kickdown operation using actual value 04 in the HHT | ||
4 Program selector switch | Ignition ON Shift through drive programs and compare with the display in HHT, actual value 09 | ||
5 Stop lamp switch | Ignition ON Check stop lamp switch for switching on/off using actual value 11 in the HHT | ||
6 Transmission fluid temperature sensor | Ignition ON Using the HHT actual value 05, measure transmission fluid temperature and check for plausibility | ||
7 Solenoid valves and pressure regulators | Actuate solenoid valves and pressure regulators in transmission | ||
8 Starter lockout | Engage selector lever position P Ignition ON Start engine Ignition ON/OFF Operate brake pedal Engage selector lever position R Start engine
Ignition ON/OFF Operate brake pedal Engage selector lever position N Start engine |
Engine can be started Engine cannot be started, starter must not turn Engine can be started It must not be possible to start the engine in selector lever positions D, 3, 2, 1 | |
9 "Keylock" | Engage selector lever position P Ignition ON Operate brake pedal Engage selector lever position R Engage selector lever position P |
Key cannot be removed Key can be removed | |
10 "Shiftlock" | Engage selector lever position P Ignition ON Do not operate brake pedal Try to engage selector lever position R Operate brake pedal Try to engage selector lever position R |
Selector lever blocks Selector lever position R can be engaged | |
11 Idle speed and boost pressure for engine version OM 601 D23 LA | Check idle speed and boost pressure | ||
12 Frictional connection | Engage selector lever position P Operate brake pedal Ignition ON Start engine Engage selector lever position R If possible, release brake pedal and parking brake and drive vehicle backwards for a short distance. If it is not possible to operate the brake pedal, check turbine speed using actual value 01 in the HHT | ||
13 Engine intervention (ME-SFI) with transmission protection (applies to N-D and N-R shifts on engine version OM 601 D23 LA) | Operate brake pedal and keep pressed down Engage selector lever position N Apply parking brake securely Start engine Operate accelerator pedal until engine speed of > 1600 rpm is reached Engage selector lever position D | Engine speed drops and N-D shift must not be jerky and slightly delayed | |
14 "Stall speed rpm" | Operate brake pedal and keep pressed down Apply parking brake securely Engage selector lever position D Apply full throttle | Engine version M 111 E20 = 2100 200 rpm Engine version M 111 E23 = 2250 200 rpm Engine version OM 601 D23 LA = 2500 200 rpm |
Referenced documents
- ad2719s200108a Notes on actuating automatic transmission (AGN)
- ad2719s200111a Automatic transmission (AGN), emergency running mode functions
- ad2719s2001a Automatic transmission (AGN), diagnostics, previous knowledge
- ad2719s3005a Automatic transmission (AGN) diagnosis, function check via actual values