DIAGNOSIS FUNCTIONS
The ECU has the following functions to facilitate in-
spection of the system.
• Self-diagnosis code output function
• Actuator test function
• Diagnosis erasure function
SELF DIAGNOSIS CODE OUTPUT FUNCTION
There are 13 diagnosis items, and the diagnosis result is
recorded even if the battery terminals are disconnected.
Output Diagnosis item Output Diagnosis item
code code
--
Normal
22
Stop lamp switch ON malfunction or broken
wire
11
Broken wire or short in wheel speed sensor
41
Abnormality in solenoid valve (FL., R.R.)
(FL.)
12
Broken wire or short in wheel speed sensor
42
Abnormality in solenoid valve (FR., R.L.)
(F R.)
13
Broken wire or short in wheel speed sensor
43
Solenoid valve drift error
(R.R.)
14
Broken wire or short in wheel speed sensor
51
Abnormality in valve relay
(R.L.)
15
Wheel speed sensor abnormality
52
Abnormality in motor relay or pump motor
21
Broken wire in G sensor or OFF malfunction
55
Abnormality in ECU
ACTUATOR TESTER FUNCTION
The actuator can be force-driven using the multi-use
tester to enable easy operation inspection to be carried
out.
NOTE
1. If the ECU function has been cancelled, then an
actuator test cannot be carried out.
2. Actuator testing is only possible when the vehicle is
stationary. If the vehicle speed during actuator
testing exceeds 10 km/h (6 mph), forced actuation
will be cancelled.
3. The following item numbers are the numbers input
to the multi-use tester when an actuator test
instruction has been given.
3-40 DRIVE-CONTROL COMPONENTS - Anti-lock Brake System
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