TERMINALS OF ECU
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
J157-1 (+B) - J157-20 (E) | Y - W-B | Power source (+B) | Always | 11 to 14 V |
J157-3 (SIG-) - J157-20 (E) | G - W-B | Ground | Always | Below 1 V |
J157-4 (IND1) - J157-20 (E) | LG - W-B | Manual (SOS) switch red indicator illumination signal | For 2 seconds after turning the engine switch on (IG) | 1 to 8.5 V |
Engine switch off | Below 1 V | |||
J157-5 (MCVD) - J157-20 (E) | L - W-B | Telephone microphone assembly power supply | Engine switch on (ACC) | 4 to 6 V |
Engine switch off | Below 1 V | |||
J157-6 (MCI+) - J157-20 (E) | P - W-B | Receive microphone voice signal | Voice being input to telephone microphone assembly | A waveform synchronized with microphone voice signal is input |
J157-7 (MCI-) - J157-20 (E) | G - W-B | Receive microphone voice signal | Always | Below 1 V |
J157-13 (GSW) - J157-20 (E) | L - W-B | Collision detection signal | Engine switch on (IG) | Pulse generation (Refer to waveform1) |
J157-19 (IG2) - J157-20 (E) | B - W-B | Power source (IG) | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
J157-20 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
J157-21 (SIG1) - J157-3 (SIG-) | R - G | Manual (SOS) switch button condition signal | Manual (SOS) switch not pressed | 1.3 to 1.9 V |
Manual (SOS) switch pressed | 0.5 to 0.8 V | |||
J157-22 (IND2) - J157-20 (E) | V - W-B | Manual (SOS) switch green indicator illumination signal | For 2 seconds after turning the engine switch on (IG) | 1 to 8.5 V |
Engine switch off | Below 1 V | |||
J157-23 (SGND) - J157-20 (E) | Shielded - W-B | Shield ground | Always | Below 1 Ω |
J157-25 (CANP) | R | CAN communication signal | - | - |
J157-26 (CANN) | W | CAN communication signal | - | - |
CHECK DCM (TELEMATICS TRANSCEIVER)
(a) Oscilloscope waveform:
(1) Waveform 1
Item | Condition |
---|---|
Tester connection | J157-13 (GSW) - J157-20 (E) |
Tool setting | 5.0 V/DIV., 20 ms/DIV. |
Vehicle condition | Engine switch on (IG) |
CHECK RADIO RECEIVER ASSEMBLY
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w/ Navigation System: Click here
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