Malfunction Code Number; Preparation - Mazda MX-5 1990 Workshop Manual

F
PREPARATION
SST
49 H018 9A1
Self-Diagnosis
Checker
SYSTEM SELECTOR
1
_TEST SW
4
SEL~
'@'
TES
12_
0
:.6
7
,,,
SYSTEM SELECT
"0
OLI
SELF-DIAGNOSIS CHECKER
MONITOR SE~ECT
sw
5
0
[f]:
0 0 0
0
49HOl88AI MADE IN JAPAN
F-78
-
l _
SELF-DIAGNOSIS FUNCTION
For diagnosis 49 6019 9AO
For diagnosis
-
-
System Selector
05UOFX·067
MALFUNCTION CODE NUMBER
Caution
• Obtain the code number and deactivate the audio
anti-theft system before disconnecting the battery.
(Refer to page T -113.)
Inspection procedure
1. Connect the SSTs to the diagnosis connector and a ground.
2. Set the select switch to position A.
3. Set the System Selector to position 1 and SELF TEST as
shown.
---SELF
TEST
J
05UOFX·069
05UOFX·070
4. Turn the ignition switch ON.
5. Verify that 88 flashes on the digital display and that the buzz-
er sounds for :3 sec. after turning the ignition switch ON.
6. If 88 does not flash, check the main relay, (Refer to page
F-139.) power supply circuit, and check connector wiring.
7. If 88 flashes and the buzzer continues for more than 20
sec.,
check for a short circuit between the engine control unit ter-
minal1 F and the diagnosis connector. Replace the engine
control unit if necessary and perform Steps 3 and 4 again.
8. Note any code numbers and check for the causes by refer-
ring to the check sequences shown on pages F-81 to
F-87. Repair as necessary.
Note
• Cancel the code numbers by performing the after-
repair procedure following repairs.
(Refer to page
F-88.)