CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
*1 | Main body ECU (multiplex network body ECU) | - | - |
Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Connect the instrument panel junction block assembly connectors.
Measure the voltage and resistance according to the value(s) in the table below.
Tester Connection | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
A-11 (GND1) - Body ground | None - Body ground | Ground | Always | Below 1 Ω |
A-30 (ACC) - Body ground | None - Body ground | ACC power supply | Engine switch on (ACC) | 11 to 14 V |
Engine switch off | Below 1 V | |||
A-31 (BECU) - Body ground | None - Body ground | Battery power supply | Always | 11 to 14 V |
A-32 (IG) - Body ground | None - Body ground | IG power supply | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
G12-1 (FLCY) - Body ground | R - Body ground | Front door courtesy light switch assembly LH input signal | Front door LH closed (OFF) → open (ON) | 10 kΩ or higher → Below 1 Ω |
G12-6 (FRCY) - Body ground | SB - Body ground*1 R - Body ground*2 |
Front door courtesy light switch assembly RH input signal | Front door RH closed (OFF) → open (ON) | 10 kΩ or higher → Below 1 Ω |
A-13 (LCTY) - Body ground | None - Body ground | Rear door courtesy light switch assembly LH input signal | Rear door LH closed (OFF) → open (ON) | 10 kΩ or higher → Below 1 Ω |
A-2 (RCTY) - Body ground | None - Body ground | Rear door courtesy light switch assembly RH input signal | Rear door RH closed (OFF) → open (ON) | 10 kΩ or higher → Below 1 Ω |
G12-30 (HCTY) - Body ground | P - Body ground | Engine hood courtesy switch input signal | Engine hood open (OFF) → closed (ON) | 10 kΩ or higher → Below 1 Ω |
*1: for LHD
*2: for RHD
Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
Measure the voltage and check for pulses according to the value(s) in the table below.
Tester Connection | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
5H-31 (LSFL) - Body ground*1 5A-15 (LSFL) - Body ground*2 |
P - Body ground*1 B - Body ground*2 |
Front door LH unlock detection switch input signal | Front door LH unlocked | Below 1 V |
Engine switch off, all doors closed and front door LH locked | Pulse generation | |||
5D-14 (LSFR) - Body ground*1 5H-31 (LSFR) - Body ground*2 |
GR - Body ground | Front door RH unlock detection switch input signal | Front door RH unlocked | Below 1 V |
Engine switch off, all doors closed and front door RH locked | Pulse generation | |||
5H-21 (LSWL) - Body ground*1 5D-12 (LSWL) - Body ground*2 |
B - Body ground*1 SB - Body ground*2 |
Rear door LH unlock detection switch input signal | Rear door LH unlocked | Below 1 V |
Engine switch off, all doors closed and rear door LH locked | Pulse generation | |||
G13-20 (LSWR) - Body ground | B - Body ground | Rear door RH unlock detection switch input signal | Rear door RH unlocked | Below 1 V |
Engine switch off, all doors closed and rear door RH locked | Pulse generation | |||
G17-12 (SSCL) - Body ground*3 | L - Body ground | Theft warning siren assembly drive | Theft warning siren assembly sounding (Theft deterrent system is in alarm sounding state) | Pulse generation (Below 1 V ←→ 11 to 14 V) |
G17-3 (SSW1) - Body ground*4 | P - Body ground | Intrusion sensor cancel switch signal | Intrusion sensor cancel switch on | Below 1 V |
Intrusion sensor cancel switch off | Pulse generation | |||
G17-14 (ISIF) - Body ground*4 | B - Body ground | Intrusion sensor (theft warning ultrasonic sensor) signal | No moving object detected by sensor | 11 to 14 V |
Theft deterrent system changes from disarmed state to armed preparation state | Pulse generation (See Waveform 1) |
|||
G17-15 (GCS) - Body ground*5 | BE - Body ground | Yawrate sensor (theft warning tile sensor) signal | Theft deterrent system changes from armed preparation state to armed state | Pulse generation (See Waveform 2) |
5F-30 (SH) - Body ground*6 | R - Body ground | Security horn drive | Security horn sounding (Theft deterrent system is in alarm sounding state) | Pulse generation (Below 1 V ←→ 11 to 14 V) |
5F-16 (HORN) - Body ground*1 5F-28 (HORN) - Body ground*2 |
P - Body ground | Vehicle horn drive | Vehicle horns sounding (Theft deterrent system is in alarm sounding state) | Pulse generation (Below 1 V ←→ 11 to 14 V) |
*1: for LHD
*2: for RHD
*3: w/o Security Horn
*4: w/ Intrusion Sensor Cancel Switch
*5: w/ Tilt Sensor
*6: w/ Security Horn
Using an oscilloscope, check the waveform.
Tech Tips
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
*a | IOUT Initial Signal | *b | IOUT Initial Response |
*c | Approximately 1.0 Second | *d | Initial Diagnosis |
*e | Approximately 1.0 to 1.6 Seconds | *f | Approximately 0.05 Seconds |
*g | Approximately 5.5 Seconds | *h | Disarmed State |
*i | Arming Preparation State | - | - |
Waveform 2 (Reference)
*a | CSIF Initial Signal | *b | CSIF Initial Response |
*c | Approximately 1.0 Second | *d | Initial Diagnosis |
*e | Approximately 1.0 to 1.6 Seconds | *f | Approximately 0.05 Seconds |
*g | Approximately 5.5 Seconds | *h | Disarmed State |
*i | Arming Preparation State | - | - |