Troubleshooting
Toyota Stand-Up End Control Service Manual
Start-up c. Disconnect the B+ power cable from the TPC. Leave the sense lead connected at TPC1. Manually depress the TPC contactor tips. If the “Waiting For Precharge” message goes away and a Code 44 appears, the Interface Card is working correctly. If the “Waiting For Precharge” message does not go away, check continuity of the wires between TPC1 and JPC8-8 (FU2_Sense on the Interface Card). d. Turn key switch OFF and disconnect battery. Reconnect the left amplifier power cable. Reconnect the battery and restart the truck. If the “Waiting For Precharge” message reappears, the left amplifier is bad. e. Turn key switch OFF and disconnect battery. Reconnect the right amplifier power cable. Reconnect the battery and restart the truck. If the “Waiting For Precharge” message reappears, the right amplifier is bad. 5. If the voltage at the output of the TPC does reach 31V: a. Perform a continuity check from the output side of the TPC contactor to JPC8-8 on the Interface Card and/or measure the voltage at JPC8-8 with respect to B-. If there is no continuity and/or voltage present, repair the truck’s wiring harness. b. Read the voltage at the output of the TPC contactor using the Analog input test A08 in Maintenance Mode. If the voltage read does not correspond with the voltage measured at JPC8-8, replace the Interface Card.
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00700-CL1SM-3 Issued: 6/1/04