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> Transmission Aw50-42, Here's some info...
ampangbear
post Aug 7 2006, 10:10 PM
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DTC table – Transmission Control Module (AW50-42)

Diagnostic trouble code (DTC) Fault message Remarks1)
AT-114 Mode selector switch, signal too high Off
AT-121 Shift solenoid S1, short-circuit to ground Flashes2)
AT-122 Shift solenoid S1, fault in solenoid circuit Flashes2)
AT-123 Line pressure solenoid STH, short-circuit to supply voltage Flashes2)
AT-124 Mode selector switch, signal too low Off
AT-131 Line pressure solenoid STH, short-circuit to ground or open-circuit Flashes
AT-132 Control module, amplifier STH short-circuit Flashes2)
AT-134 Load signal, faulty signal Flashes4)
AT-141 Oil temperature sensor, signal too low Off
AT-142 Oil temperature sensor, signal too high Off
AT-143 Kickdown switch (KD), signal too low Off
AT-213 Throttle position (TP) sensor signal, signal too high Flashes2)
AT-221 Shift solenoid S2, short-circuit to ground Flashes2)
AT-222 Shift solenoid S2, fault in solenoid circuit Flashes2)
AT-223 Throttle position (TP) sensor signal, signal too low Flashes2)
AT-232 Vehicle speed signal, signal missing Flashes2)
AT-235 Oil temperature, too high Flashes3)
AT-245 Torque limiting signal, signal missing Flashes
AT-311 Transmission speed sensor, signal missing Flashes2)
AT-313 Gear-shift position sensor, faulty signal Flashes2)
AT-321 Gear 1, incorrect ratio Flashes2)
AT-322 Gear 2, incorrect ratio Flashes2)
AT-323 Gear 3, incorrect ratio Flashes2)
AT-324 Gear 4, incorrect ratio Flashes2)
AT-331 Lock-up solenoid SL, short-circuit to supply voltage Off5)
AT-332 Lock-up solenoid SL, open-circuit Off5)
AT-333 Lock-up solenoid SL, short-circuit to ground Off5)
AT-341 Lock-up function, slipping or not engaged Flashes6)
AT-411 Control module, EEPROM memory fault Off
AT-412 Control module, memory fault Flashes6)
AT-421 Battery voltage too low Off

1) Combined instrument panel warning lamp. When a fault occurs the diagnostic trouble code (DTC) is stored and after a set interval the warning lamp begins to flash. If the fault is intermittent and disappears, the warning lamp will go out after the ignition has been switched on and off a number of times, but the diagnostic trouble code (DTC) persists. The diagnostic trouble code (DTC) should be checked.
2) Malfunction indicator lamp (MIL) comes on. Only USA/CDN
3) Only while the temperature remains high.
4)When a fault occurs the combined instrument panel warning lamp flashes once.
5) The warning lamp in the combined instrument panel flashes. Activates Malfunction Indicator Lamp (MIL). Only USA and Canada 1997 model year.–
6) Activates malfunction indicator lamp (MIL). Only USA and Canada 1997 model year.–
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ampangbear
post Aug 7 2006, 10:10 PM
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On Board Diagnostics II (OBD II)
Only USA/CDN - General

OBD II is a diagnostics system designed to meet statutory requirements. Fault-tracing instruments can be plugged in to the OBD II socket in order to read diagnostic trouble codes (DTCs) and system parameters. OBD II contains only emission related diagnostic trouble codes (DTCs) and parameters and cannot provide the comprehensive range of information available from the Volvo On-board diagnostics system. See OBD II codes AW50–42.

OBD-II–codes AW50-42



OBD II–codes* Fault message Volvo on-board diagnostic (OBD) system diagnostic trouble code (DTC)
P0120 Throttle position (TP) sensor signal, signal too high AT-213
P0120 Throttle position (TP) sensor signal, signal too low AT-213
P0500 Vehicle speed signal, signal missing AT-232
P0601 Control module, memory fault AT-412**
P0705 Gear-shift position sensor, faulty signal AT-313
P0715 Transmission speed sensor, signal missing AT-311
P0731 Gear 1, incorrect ratio AT-321
P0732 Gear 2, incorrect ratio AT-322
P0733 Gear 3, incorrect ratio AT-323
P0734 Gear 4, incorrect ratio AT-324
P0740 Lock-up solenoid SL, short-circuit to supply voltage AT-331**
P0740 Lock-up solenoid SL, open-circuit AT-332**
P0740 Lock-up solenoid SL, short-circuit to ground AT-333**
P0740 Lock-up function, slipping or not engaged AT-341**
P0745 Line pressure solenoid STH, short-circuit to supply voltage AT-123
P0745 Control module, amplifier STH short-circuit AT-132
P0750 Shift solenoid S1, short-circuit to ground AT-121
P0750 Shift solenoid S1, fault in solenoid circuit AT-122
P0755 Shift solenoid S2, short-circuit to ground AT-221
P0755 Shift solenoid S2, fault in solenoid circuit AT-222


*) Activates malfunction indicator lamp (MIL).
**) Applies to 1997 model year–
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ampangbear
post Aug 7 2006, 10:14 PM
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Indicator and warning lamps
Automatic transmission




The transmission control module (TCM) activates the combined instrument panel warning lamp.

The lamp lights up when the ignition is switched on and when driving if:
-The gear selector is in positions 3 or L
-Driving mode W (winter) has been selected.

The lamp flashes when the ignition is switched on and when driving if:
-The transmission control module (TCM) has detected a fault in the transmission. There are certain exceptions. See DTC table .





If the fault is intermittent the indicator and warning lamp will go out after the ignition has been switched on and off a certain number of times. The ignition may have to be switched on up to five times, depending on the diagnostic trouble code (DTC) that has been stored.

For diagnostic trouble code (DTC) AT-235, High oil temperature, the lamp flashes only as long as the temperature of the oil exceeds +140°C.



Malfunction indicator lamp (MIL)



The malfunction indicator lamp (MIL) is activated if the engine management systems malfunction. These malfunctions can cause engine running problems and result in the engine failing to maintain required emission levels. In some markets where an on-board diagnostics system OBD II is a statutory requirement, the transmission control module (TCM) can also activate the malfunction indicator lamp (MIL). The transmission control module (TCM) sends a request to the engine control module (ECM) to activate the malfunction indicator lamp (MIL) if an emission-related transmission malfunction occurs.

(The Motronic 4.4 engine control module (ECM) posts a diagnostic trouble code (DTC) when the transmission sends a malfunction indicator lamp (MIL) request.)

The malfunction indicator lamp (MIL) lights when the following automatic transmission diagnostic trouble codes (DTCs) are stored:

-AT-121 Shift solenoid S1, short-circuit to ground
-AT-122 Shift solenoid S1, fault in the solenoid circuit
-AT-123 Line pressure solenoid STH, short-circuit to supply voltage
-AT-132 Control module, short-circuit in amplifier STH
-AT-213 Throttle position (TP) sensor signal, signal too high
-AT-221 Shift solenoid S2, short-circuit to ground
-AT-222 Shift solenoid S2, fault in solenoid circuit
-AT-223 Throttle position (TP) sensor signal, signal too low
-AT-232 Vehicle speed signal, signal missing
-AT-311 Transmission speed sensor, signal missing
-AT-313 Gear-shift position sensor, faulty signal
-AT-321, Gear 1, incorrect ratio
-AT-322, Gear 2, incorrect ratio
-AT-323, Gear 3, incorrect ratio
-AT-324, Gear 4, incorrect ratio
-AT-331 Lock-up solenoid SL, short-circuit to supply *)
-AT-332, Lock-up solenoid SL, break in circuit *)
-AT-333 Lock-up solenoid SL, short-circuit to supply *)
-AT-341 Lock-up slips or is disengaged *)
-EFI-412 Engine control module (ECM), memory fault *)
*) Applies to 1997 model year– See also table, On Board Diagnostics II (OBD II) .

Attached File(s)
Attached File  Indicator_and_warning_lamps_for_AW50_42.doc ( 84.5K ) Number of downloads: 104
 
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ampangbear
post Aug 7 2006, 10:19 PM
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Gear selector and mode selector
Gear selector

The gear selector is mechanically connected to the transmission by a cable, which operates the gear selector valve in the control system. A mode selector located on the gear selector makes it possible for the driver to switch between three different shifting modes: ECON (Economy), SPORT (Sport) and WINTER (Winter).


The gear selector has 6 positions, with the following functions:
-P Park position.
-R Reverse.
-N Neutral.
-D Automatic shifting between all gears. (Not applicable when mode selector is in WINTER position).
-3 In this position the 4th gear is blocked. The warning light on instrument panel lights. Automatic shifting occurs between the other gears. (Not applicable when mode selector is in WINTER–position.)
-L In this position only the 1st and 2nd gears operate. The warning light on the instrument panel lights. Automatic downshifting occurs, but upshifting is inhibited. If the gear selector is moved to position L at a road speed exceeding approximately 25–40 km/h (ECON) or 10–15 km/h (SPORT) 2nd gear will be engaged. If the speed is reduced to below approx. 25–40 km/h (ECON) or 10–15 km/h (SPORT) downshifting to 1st gear will occur, but upshifting will not occur, regardless of vehicle speed. (The speed variations depend on which engine the transmission is used with and do not apply when the WINTER mode is selected.)


Mode selector

The mode selector has a toggle switch for ECON and SPORT modes and a push-button for WINTER mode. The ECON and SPORT selector remains in the selected position. In contrast, the WINTER button is spring-loaded and can be depressed without affecting the other selector setting. Selecting ECON mode will automatically deselect SPORT mode, while the WINTER mode can be selected regardless of the position of the ECON/SPORT button. WINTER mode will remain in operation until the button is pressed again, the toggle switch position is changed or the ignition is switched off. When the car is started again the program ECON or SPORT will be used, depending on the button position.




ECON Mode (Economy)
This shifting program is intended for "normal" driving and provides early upshifting combined with lock–up. In addition, the transmission line pressure is modulated to provide smooth gear engagement. At Wide Open Throttle (WOT), the kickdown function is engaged and shifting occurs at higher engine speed to provide a power boost, for example, when overtaking.

SPORT Mode (Sport)
In Sport mode, the shifting points are designed to provide maximum performance. As long as acceleration is gently applied, shifts occur as for Economy mode. During increased acceleration, the control module selects the shift and lock–up points for the best possible performance. Kickdown can be activated if necessary.

WINTER Mode (Winter)
Winter mode makes it possible to start driving in high gear to avoid wheelspin on slippery roads. This mode is also applicable in other problem situations in which the driver needs a more direct control over gear selection. Lock–up is engaged in all gears except 1st gear. Depending on the gear position, the following combinations can be obtained:

-D The car starts in 3rd gear. Automatic shifting between 3rd and 4th gears occurs earlier than in ECON mode, D position.
-3 The car starts in 2nd gear. No up– or downshifting occurs.
-L The car starts in 1st gear. No up– or downshifting occurs.

When Winter mode is selected, the warning light on the instrument panel lights.
If kickdown is activated in Winter mode, the transmission uses all gears for maximum performance.



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ampangbear
post Aug 7 2006, 10:21 PM
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Park/neutral position function

The gear-shift position sensor has a start inhibit function to prevent starting of the engine while a gear is selected.
This function prevents the engine being started unless the Neutral or Park positions are selected. This prevents the car from inadvertently lurching forwards when started.

Attached File(s)
Attached File  PNP.jpg ( 25.97K ) Number of downloads: 136
 
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ampangbear
post Aug 7 2006, 10:34 PM
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Park/Neutral position (PNP) switch and ignition switch lock
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ampangbear
post Aug 7 2006, 10:36 PM
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Transmission shift speeds, km/h (mph)

General

The AW 50–42 automatic transmission is equipped with a "mode selector" with three different driving modes: Economy, Sport and Winter. Depending on the selected mode, shift speeds are determined and mechanical lock–up engaged at different speeds. Below are the shift speeds for the three driving modes together with the engine types and model years at selected throttle openings. Set gearshift selector to position D. When test driving, the speeds in the tables should be used as a guide since it is not possible to take an exact reading of speed and throttle position during actual driving.

Economy Mode (E), D position

Engine Throttle
opening (%) Shifting-speed km/h(mph)
1–2 2–3 3–4 4–3 3–2 2–1
B5254S/
B5234S 20 22(14) 43(27) 59(37) 48(30) 34(21) 15(10)
B5254S 20 22(14) 41(26) 58(36) 48(30) 30(19) 14(9)
B5234T 20 23(14) 43(27) 65(41) 46(29) 26(16) 14(9)
B5252S 20 20(12) 38(24) 54(34) 45(28) 26(16) 13(8)
B5204S 20 17(11) 47(29) 62(39) 47(29) 27(17) 12(8)
B5202S 20 19(12) 34(21) 55(34) 42(26) 18(11) 7(4)
B5254S/
B5234S 60 38(24) 77(48) 120(75) 96(60) 58(36) 24(15
B5254S 65 41(26) 80(50) 126(79) 83(52) 54(34) 26(16)
B5234T 60 40(25) 82(51) 122(76) 85(53) 49(31) 26(16)
B5252S 60 40(25) 73(46) 110(68) 91(57) 59(37) 29(18)
B5204S 50 27(17) 57(36) 101(63) 70(44) 35(22) 17(11)
B5202S 60 36(22) 68(43) 111(69) 75(46) 39(24) 15(9)
B5254S/
B5234S 100 52(32) 101(63) 155(97) 140(88) 80(50) 37(23)
B5254S 100 52(32) 101(63) 150(9 130(81) 80(50) 38(24)
B5234T 100 48(30) 101(63) 145(9 120(75) 76(48) 36(22)
B5252S 100 50(31) 94(59) 145(91 130(81) 80(50) 36(22)
B5204S 100 45(28) 95(60) 145(91 118(74) 75(47) 33(20)
B5202S 100 45(28) 90(56) 132(82 115(71) 85(53) 35(21)
B5254S/
B5234SS kickdown
position 60(37) 120(75) 175(109) 168(105) 110(69) 49(31)
B5254S kickdown
position 60(37) 120(75) 175(109) 168(105) 110(69) 53(33)
B5234T kickdown
position 60(37) 122(76) 180(113) 170(106) 113(71) 49(31)
B5252S kickdown
position 60(37) 111(69) 175(109) 170(106) 105(66) 49(31)
B5204S kickdown
position 56(35) 108(67) 157(98)1 53(96) 104(65) 49(31)
B5202S kickdown
position 56(35) 103(64) 154(96)1 50(93) 98(61) 50(31)

*) USA, Canada
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ampangbear
post Aug 7 2006, 10:39 PM
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Transmission Identification Plate...



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Attached File  Transmission_identification_Plate.doc ( 43K ) Number of downloads: 255
 
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ampangbear
post Aug 7 2006, 10:57 PM
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Permanent functions of the AW50-42 transmission...

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Attached File  Permanent_program_functions_of_AW50_42.doc ( 447.5K ) Number of downloads: 330
 
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