Inspection of ID Controller and Its Circuits (If Equipped)
Precautions: Precautions for Diagnosing Trouble · Precautions for Immobilizer System · General safety (00)
Voltage and Signal Check
Check voltage and/or pulse signal of ID controller using voltmeter and oscilloscope.
NOTE:
•Check that battery voltage is 12 V or more.
•The voltage of terminal with asterisk (*) cannot be measured by voltmeter because it is pulse signal.
Check it with oscilloscope if necessary.
•The voltage of terminal with asterisk (*) cannot be measured by voltmeter because it is pulse signal.
Check it with oscilloscope if necessary.
| [A]: | ID controller connector (View: [a]) |
“E481” connector
| Terminal No. | Wire color | Circuit | Normal voltage | Condition |
|---|---|---|---|---|
| E481-1 | BLK | Ground | Below 0.3 V | Ignition: “ON” |
| E481-2* | WHT | CAN communication (low) | Refer to CAN communication signal. | |
| E481-3* | RED | CAN communication (high) | ||
| E481-4* | RED | CAN communication (high) | ||
| E481-5* | WHT | CAN communication (low) | ||
| E481-6 | — | — | — | — |
| E481-7 | — | — | — | — |
| E481-8 | BLU | Power source | 10 – 14 V | Ignition: “ON” |
| Approx. 0 V | Other than above condition | |||
Reference Waveform
Oscilloscope display
Shown below is typical waveform display provided by oscilloscope.
NOTE:
How to read waveforms is shown below.
| [a]: | Waveform of channel 1 | [c]: | VOLT/DIV of each channel |
| [b]: | Ground level of each channel | [d]: | TIME/DIV |
CAN communication signal
CAN communication signal (High) (1)
| Channel | Probe | Terminal No. |
|---|---|---|
| 1 | + | E481-3 E481-4 |
| – | E481-1 |
CAN communication signal (Low) (2)
| Channel | Probe | Terminal No. |
|---|---|---|
| 2 | + | E481-2 E481-5 |
| – | E481-1 |
Measurement condition
•Ignition: “ON”
