TROUBLE DIAGNOSES — Self-diagnosis (Cont'd)
BR-7021prose procedureSelf-diagnosis (Cont'd)
Self-diagnosis Procedure (continuation from BR-7020)
Probable Cause
Corrective Action
From BR-7020 (label A)
Check ABS warning lamp for deactivation after driving vehicle over 30 km/h (19 mph) for at least one minute.
Check ABS warning lamp for deactivation after driving vehicle over 30 km/h (19 mph) for at least one minute.
After making certain that warning lamp does not come on, test the ABS SELF-DIAGNOSIS in a safe area to verify that it functions properly.
Cause
From BR-7020 (label A)
Fix
Check ABS warning lamp for deactivation after driving vehicle over 30 km/h (19 mph) for at least one minute.
Cause
Check ABS warning lamp for deactivation after driving vehicle over 30 km/h (19 mph) for at least one minute.
Fix
After making certain that warning lamp does not come on, test the ABS SELF-DIAGNOSIS in a safe area to verify that it functions properly.
HOW TO READ SELF-DIAGNOSTIC RESULTS (Malfunction codes)
Determine the code No. by counting the number of times the warning lamp flashes on and off.
When several malfunctions occur at one time, up to three code numbers can be stored; the latest malfunction will be indicated first.
The indication begins with the start code 12. After that a maximum of three code numbers appear in the order of the latest one first. The indication then returns to the start code 12 to repeat (the indication will stay on for five minutes at the most).
The malfunction code/sympton chart is given on page BR-7033.
NOTE
Example: Code No. 32 REAR SENSOR SHORT-CIRCUIT
| Specification | Value |
|---|---|
| Start code 12 — initial off intervalWarning lamp OFF before first pulse | 3.0s |
| Tens digit ON pulse | 0.6s |
| Tens digit OFF gap | 0.6s |
| Tens / Units separatorLonger OFF between tens and units digits | 0.9s |
| Units digit OFF gap | 0.3s |
| Code-to-code separatorOFF gap between successive codes | 3.3s |
Start code 12 — initial off intervalWarning lamp OFF before first pulse
3.0s
Tens digit ON pulse
0.6s
Tens digit OFF gap
0.6s
Tens / Units separatorLonger OFF between tens and units digits
0.9s
Units digit OFF gap
0.3s
Code-to-code separatorOFF gap between successive codes
3.3s
HOW TO ERASE SELF-DIAGNOSTIC RESULTS (Malfunction codes)
Erase Self-diagnostic Results
- 1Disconnect the check terminal from ground (ABS warning lamp will stay lit).
- 2Within 12.5 seconds, ground the check terminal 3 times. Each terminal ground must last more than 1 second. The ABS warning lamp goes out after the erase operation has been completed.
ABR256 - 3Perform self-diagnosis again. Refer to BR-7020. Only the startcode should appear, no malfunction codes.