Execution Condition
<Monitor 1>
Processed in order Step 1 through Step 3 .
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| (Power supply IC timer) - (Wake-up request time)/Wake-up request time | More than 0.24 |
<Monitor 2>
Judge as abnormal in engine off timer when the power supply IC timer exceeds the wake-up request time before wake up.
When case #1 is not performed, perform case #2.
Processed in order Step 1 through Step 3 .
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| {(Power supply IC timer) - (Wake-up request time)}/Wake-up request time | More than 0.24 |
<Monitor 3>
Diagnose the communication error between main CPU and sub CPU.
Judge as NG when the wake-up time required from main CPU and the wake-up time received from sub CPU are different.
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Wake-up time required by main CPU | Not equal to wake-up time sent back by sub CPU |
<Monitor 4>
Diagnose the communication error between main CPU and power supply IC.
Judge as NG when the signal required by main CPU and the signal received from power supply IC are different.
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Signal required by main CPU | Not equal to signal received from power supply IC |
<Monitor 5>
On main CPU and sub CPU, there are two operation status: "normal mode" and "wake-up mode". Perform diagnosis for CPU operation status abnormality by detecting the difference in operating status of main CPU and sub CPU.
Judge as NG when main CPU and sub CPU is different in operating status.
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value |
|---|---|
| Operating status of main CPU | Not equal to operating status of sub CPU |
Time needed for diagnosis
- Monitor 1, 2: Less than 1 s
- Monitor 3, 4: 2 seconds
- Monitor 5: 3 seconds
Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.