TEHCM Interface Board Manual - Community Spice

More documents

Recommendations

Info

BAUER CONTROLSLoopbackThe T90 TEHCM has redundant power and ground pins. The BTIBuses one set of power and ground pins to power the TEHCM devicewhile monitoring the second set of pins (VBAT_LOOPBACK andGND_LOOPBACK) on the TEHCM. The voltage divider shown in thefollowing diagram is used to monitor the two signals and the ground pinGND_ETRS (located on TEHCM connector J3-9).The T92 TEHCM does not use redundant power and ground pins. TheBTIB monitors the following signals on the T92 TEHCM:• V12B_TISS• V12B_TOSSIf any of the signals is faulty, the voltage LOOPBACK reflects thechange.The following figure shows the power and ground pins, V12B_TISSand V12B_TOSS signals, and the voltage divider.The following tables list the possible combinations of failure modeconditions of the loopback signals and the resulting loopback voltages(LOOPBACK_1) that reflect the failures.T90 TEHCMVBAT_LOOPBACKFailure Mode ConditionGND_LOOPBACK GND_ETRSOK OK OK 1.3 VFAULT OK OK 0 VOK FAULT OK 2.34 VOK OK FAULT 2.34 VLOOPBACK_118 / Signal Routing November 13, 2008
TEHCM INTERFACE BOARD MANUALT92 TEHCMFailure Mode ConditionLOOPBACK_1V12B_TISS V12B_TOSSOK OK 3.918 VFAULT OK 2.34 VOK FAULT 2.34 VPark-NeutralSwitchThe Park-Neutral signal is a hardwire connection that is routed directlythrough the TEHCM, connecting the Park-Neutral switch with thevehicle pass-through connector. The BTIB sources current through a400 Ohm resistor on the J3 connector side of the TEHCM.On the opposite side of the TEHCM, the BTIB sinks current throughanother 400 Ohm resistor to ground, as shown in the followingdiagram. An optocoupler is enabled if the circuit exists, and maintains15 milliamps through the wire circuit.The following figure shows the connectors, pin assignments, andsignal paths for the Park-Neutral signals.The following table lists the sink and source values for the Park-Neutralsignals.TEHCMSignal NameSink ResistorBTIB InterfaceSource ResistorP_SWT N/A 400 OhmP/N 400 Ohm N/ANovember 13, 2008 Signal Routing / 19
Page 1: BAUERTEHCM InterfaceBoard ManualBau
Page 5: TEHCM INTERFACE BOARD MANUALCHAPTER
Page 8 and 9: BAUER CONTROLS• P26—Ribbon cabl
Page 10 and 11: BAUER CONTROLSHowever, digital sign
Page 14 and 15: BAUER CONTROLSThe following table l
Page 16 and 17: BAUER CONTROLSThe following table l
Page 18 and 19: BAUER CONTROLSThe ignition, access,
Page 20 and 21: BAUER CONTROLSResistor Value2.32 kO
Page 25: TEHCM INTERFACE BOARD MANUALAPPENDI
Page 29 and 30: TEHCM INTERFACE BOARD MANUALAPPENDI
Page 31: TEHCM INTERFACE BOARD MANUALAPPENDI
Page 34 and 35: BAUER CONTROLSQty Description Manuf
Page 36 and 37: BAUER CONTROLSQty Description Manuf
Page 38 and 39: BAUER CONTROLS34 / Schematics Novem
Page 40 and 41: BAUER CONTROLS36 / Schematics Novem
Page 42: BAUER CONTROLS38 / Schematics Novem

TEHCM Interface Board Manual - Community Spice

Create successful ePaper yourself

Delete template?

Save as template?