CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
Disconnect the H79, H80, DB, DE and DG ECU connectors.
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
H79-4 (BATB) - Body ground | BR - Body ground | Battery power supply | Always | 11 to 14 V |
DG-1 (ALTB) - Body ground | W - Body ground | Battery power supply | Always | 11 to 14 V |
DB-30 (BECU) - Body ground | W - Body ground | Battery power supply | Always | 11 to 14 V |
DE-28 (GND1) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
H80-4 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the H79, H80, DB, DE and DG ECU connectors.
Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
DC-6 (DCTY) - Body ground | BR - Body ground | Front door courtesy light switch RH input | Driver side door open | Below 1 V |
DC-6 (DCTY) - Body ground | BR - Body ground | Front door courtesy light switch RH input | Driver side door closed | 11 to 14 V |
DA-24 (PCTY) - Body ground | W - Body ground | Front door courtesy light switch LH input | Front passenger side door open | Below 1 V |
DA-24 (PCTY) - Body ground | W - Body ground | Front door courtesy light switch LH input | Front passenger side door closed | 11 to 14 V |
H79-8 (LCTY) - Body ground | SB - Body ground | Rear door courtesy light switch LH input | Rear door LH open | Below 1 V |
H79-8 (LCTY) - Body ground | SB - Body ground | Rear door courtesy light switch LH input | Rear door LH closed | 11 to 14 V |
DE-19 (RCTY) - Body ground | LG - Body ground | Rear door courtesy light switch RH input | Rear door RH open | Below 1 V |
DE-19 (RCTY) - Body ground | LG - Body ground | Rear door courtesy light switch RH input | Rear door RH closed | 11 to 14 V |
DA-7 (BCTY) - Body ground | LG - Body ground | Back door courtesy light switch input | Back door open | Below 1 V |
DA-7 (BCTY) - Body ground | LG - Body ground | Back door courtesy light switch input | Back door closed | 11 to 14 V |
DH-7 (L2) - Body ground | SB - Body ground | Front door lock RH key switch input | Front door lock key cylinder lock position | Below 1 V |
DH-7 (L2) - Body ground | SB - Body ground | Front door lock RH key switch input | Ignition switch off, all doors closed and front door lock key cylinder neutral position | Pulse generation (see waveform 1 or 2) |
H79-25 (LSWD) - Body ground | LG - Body ground | Front door lock RH (door lock position switch) input | Driver side door unlocked | Below 1 V |
H79-25 (LSWD) - Body ground | LG - Body ground | Front door lock RH (door lock position switch) input | Ignition switch off, all doors closed and driver side door locked | Pulse generation (see waveform 3 or 4) |
H79-10 (LSWP) - Body ground | LG - Body ground | Front door lock LH (door lock position switch) input | Front passenger side door unlocked | Below 1 V |
H79-10 (LSWP) - Body ground | LG - Body ground | Front door lock LH (door lock position switch) input | Ignition switch off, all doors closed and front passenger side door locked | Pulse generation (see waveform 5 or 6) |
H81-10 (LSR) - Body ground | Y - Body ground | Rear door lock (door lock position switch) input | Rear door unlocked | Below 1 V |
H81-10 (LSR) - Body ground | Y - Body ground | Rear door lock (door lock position switch) input | Ignition switch off, all doors closed and rear door locked | Pulse generation (see waveform 7 or 8) |
DH-6 (UL2) - Body ground | P - Body ground | Front door lock RH (key-linked switch) input | Front door lock key cylinder unlock position | Below 1 V |
DH-6 (UL2) - Body ground | P - Body ground | Front door lock RH (key-linked switch) input | Ignition switch off, all doors closed and front door lock key cylinder neutral position | Pulse generation (see waveform 9 or 10) |
H79-15 (IND) - Body ground | Y - Body ground | Security indicator signal | Security indicator illuminates (illuminates only for 30 (+/-5) seconds in alarm sounding state (blinking when system in armed state)) | 3 to 6 V |
H80-6 (SSCL) - Body ground | R - Body ground | Theft warning siren (self power siren) signal | Theft warning siren (self power siren) sounding (theft warning system in alarm sounding state) | Pulse generation |
H80-6 (SSCL) - Body ground | R - Body ground | Theft warning siren (self power siren) signal | Theft warning siren (self power siren) not sounding (theft warning system in armed state) | Pulse generation |
H80-7 (ISIF) - Body ground*1 | BE - Body ground | Intrusion sensor signal input | No moving object detected | 6.5 to 14 V |
H80-7 (ISIF) - Body ground*1 | BE - Body ground | Intrusion sensor signal input | Moving object detected during arming preparation state or armed state | Pulse generation (see waveform 11) |
H80-8 (SSW1) - Body ground*1 | Y - Body ground | Intrusion sensor cancel switch signal | Intrusion sensor cancel switch on | Below 1.5 V |
H80-8 (SSW1) - Body ground*1 | Y - Body ground | Intrusion sensor cancel switch signal | Intrusion sensor cancel switch off | 4.5 to 14 V |
H81-8 (GBS) - Body ground*2 | G - Body ground | Glass breakage sensor signal | Glass breakage sensor normal | Below 2 V |
H81-11 (HCTY) - Body ground | R - Body ground | Engine hood courtesy switch | Engine hood closed | Below 1 Ω |
H81-11 (HCTY) - Body ground | R - Body ground | Engine hood courtesy switch | Engine hood open | 10 kΩ or higher |
*1: w/ Intrusion Sensor
*2: w/ Glass Breakage Sensor
If the result is not as specified, the ECU may have a malfunction.
Using an oscilloscope, check waveform 1.
Item | Content |
---|---|
Terminal No. (Symbol) | DH-7 (L2) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and front door lock key cylinder neutral position |
Using an oscilloscope, check waveform 2.
Item | Content |
---|---|
Terminal No. (Symbol) | DH-7 (L2) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and front door lock key cylinder neutral position |
Using an oscilloscope, check waveform 3.
Item | Content |
---|---|
Terminal No. (Symbol) | H79-25 (LSWD) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and driver side door locked |
Using an oscilloscope, check waveform 4.
Item | Content |
---|---|
Terminal No. (Symbol) | H79-25 (LSWD) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and driver side door locked |
Using an oscilloscope, check waveform 5.
Item | Content |
---|---|
Terminal No. (Symbol) | H79-10 (LSWP) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and front passenger side door locked |
Using an oscilloscope, check waveform 6.
Item | Content |
---|---|
Terminal No. (Symbol) | H79-10 (LSWP) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and front passenger side door locked |
Using an oscilloscope, check waveform 7.
Item | Content |
---|---|
Terminal No. (Symbol) | H81-10 (LSR) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and rear door locked |
Using an oscilloscope, check waveform 8.
Item | Content |
---|---|
Terminal No. (Symbol) | H81-10 (LSR) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and rear door locked |
Using an oscilloscope, check waveform 9.
Item | Content |
---|---|
Terminal No. (Symbol) | DH-6 (UL2) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and driver side key cylinder neutral position |
Using an oscilloscope, check waveform 10.
Item | Content |
---|---|
Terminal No. (Symbol) | DH-6 (UL2) - Body ground |
Tool Setting | 5 V/DIV., 20 ms/DIV. |
Condition | Ignition switch off, all doors closed and driver side key cylinder neutral position |
Using an oscilloscope, check waveform 11.
Item | Content |
---|---|
Terminal No. (Symbol) | H80-7 (ISIF) - Body ground |
Tool Setting | 2 V/DIV., 500 ms/DIV. |
Condition | Moving object detected during arming preparation state or armed state |