HSA (HILL START AID) 5A5-15
Procedure of Trouble Diagnosis
Description of Diagnosis
HSA diagnostic procedure is classified into two kinds;
one is with diagnostic trouble codes indicated by blink-
ing pattern of the HSA indicator lamp, and the other is
from trouble symptoms. Refer to “Diagnostics with diag-
nostic trouble code” in the first case, and “Diagnostics
with Phenomenon” in the latter case for diagnostic pro-
cedures.
Self-diagnosis
The HSA can perform the self-diagnosis when a mal-
function occurs in the system.
Perform the self-diagnosis in the following procedure.
HSA indicates the result in the lamp blinking pattern and
the buzzer.
1. Park the vehicle and apply the parking brake.
2. Press the adjust switch “FAST” or “SLOW” and
hold it. Self-diagnosis display continues while the
switch is pressed.
3. While pressing the switch, diagnostic trouble
codes (DTC) are displayed with the HSA indicator
lamp blinking pattern. Buzzer beeps in synchroni-
zation with lamp while displaying the trouble code.
Caution:
DTCs are displayed for three times each in turn. After
taking a round, the DTCs are displayed in the same or-
der repeatedly.
• When multiple number of trouble code stored;
Code 25/Code 91
N5A3019E
N5A3020E