GENERAL –
How to Use Troubleshooting/Inspection Service Points
00-8
WHEN USING THE WARNING LAMP
1.
Use the special tool to earth No.1 terminal (diagnosis
control terminal) of the diagnosis connector.
2.
To check ABS system, remove the valve relay.
NOTE
That is because the valve relay is off and the warning
lamp remains illuminated if there is a fault in the ABS
system.
3.
Turn on the ignition switch.
4.
Read out a diagnosis code by observing how the warning
lamp flashes.
Applicable systems
System name
Warning lamp name
MPI
Engine warning lamp
AYC
AYC warning lamp
ABS
ABS warning lamp
Indication of diagnosis code by warning lamp
When the diagnosis code No.24 is output
When no diagnosis code is output*
On
Off
1.5 secs.
0.5 sec.
0.5 sec.
Pause
time 3
secs.
Tens
signal
Place
division
2 secs.
Units
signal
On
Off
0.5 sec.
NOTE
*:
Even if the ABS system is normal, removing the valve relay causes the diagnosis code No.52 to
be output.
WHEN USING THE VOLTMETER
Use the special tool to connect the diagnosis output terminals
and the earth terminal of the diagnosis connector to a voltmeter
and take a reading of the diagnosis codes from the movement
of the needle.
Voltmeter connection terminals
System name
Positive connection
terminal
Negative connec-
tion terminal
Full-auto air
conditioner
11
4 or 5
Diagnosis connector
MB991529
Earth terminal
Full-auto air con-
ditioner terminal
MB991529