|
|
Content .. 2416 2417 2418 2419 ..
If the result is not as specified, the ECU may have a malfunction. b. Using an oscilloscope, check waveform 1. Compressor lock signal WAVEFORM REFERENCE J19-13 (SG-2) - Body ground G - Body ground Ground for ambient Always Below 1 ohms J19-37 (LIN1) - J19-14 (GND) SB - W-B LIN communication signal Ignition switch ON Pulse generation J19-11 (CANH) - J19-14 (GND) B - W-B Hi-level CAN bus line Ignition switch ON Pulse generation c) J19-12 (CANL) W - W-B Lo-level CAN bus line Ignition switch ON Pulse generation d) z1-2 (BUS G) - Body ground - Ground for BUS IC Always Below 2 V z1-3 (BUS) - 21- 2 (BUS G) - BUS IC control signal Ignition switch OFF --> ON Pulse generation z1-4 (BBUS) - z1-2 (BUS G) - Power supply for BUS IC Always 11 to 14 V z1-5 (SGA) - - Ground for evaporator Always Below 2 V z1-6 (TEA) - z1- 5 (SGA) - A/C evaporator Ignition switch ON 1.7 to 2.1 V z1-6 (TEA) - z1- 5 (SGA) - A/C evaporator Ignition switch ON 0.7 to 1.3 V Terminal No. (Symbols) Tool Setting Condition J19-8 (LOCK) - J19-14 (GND) 200 mV/DIV., 10 ms./DIV. Engine is running Blower switch LO A/C switch ON
2009 Toyota Tundra 2009 HVAC Air Conditioning - Tundra
|