Allison Transmission WTECII Instrukcja rozwiązywania problemów - Strona 3
Przeglądaj online lub pobierz pdf Instrukcja rozwiązywania problemów dla Jednostka sterująca Allison Transmission WTECII. Allison Transmission WTECII 4 stron. Ecu’s (tcm’s) power failure troubleshooting guide
Drukuj stronęAllison WTECII & WTECIII ECU's (TCM's) Power Failure
Instructions for WTECIII system (single red digit on Your shift selector)
Have you recently replaced battery and accidentally swapped battery terminals?
If "YES", ECU may be fried beyond repair.
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If "NOT", locate the ECU (in most RV's is near shift selector, close to VIM Module or
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mostly on trucks, close to transmission (just follow bundle of wires from
transmission).
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Disconnect the battery first, then unplug all three connectors from ECU and
reconnect battery.
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Closely check the GRAY connector for numbers.
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Insert test lamp leads into corresponding connector sockets: 1 and 32 then 16 and
17.
Next turn "ON" Ignition switch and insert test leads to 17 and 26. If cavity #26 is blank, use
BLACK connector socket #4. Lamp must glow brightly.
#17; #32 = BATTERY GROUND; #1; #16 = BATTERY POWER; #26 gray or #4 black =
IGNITION.
Next turn ignition and battery "OFF", reconnect GRAY ECU connector only, then
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reconnect battery and turn "ON" ignition.
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Then very carefully touch gold plated pins #16 and #32 (on ECU BLACK connector)
with lamp test leads. Lamp must glow bright.
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Then use a voltmeter to check 5V on pin #3 (on ECU BLACK connector) against
chassis ground.
defective.
Also check socket #3 on BLACK connector with ohmmeter against chassis ground. Must be
over 4k ohms.
Shift selector can be checked using ordinary 9V battery and hookup wire.
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Connect the 9V battery using hookup wire which you may have to slightly bent on the
ends so they can hold inside BLACK connector sockets.
Brought to you by the Monaco Parts List Project:
Troubleshooting Guide
Reference:
DO NOT use test lamp!
Page 3 of 4
http://www.visualsc.com/monaco_parts.php
https://www.transmissioninstruments.com/troubleshooting/
If no 5V is found on pin #3, ECU is