Mazda MX-5 1990 Workshop Manual page 725

AIR BAG SYSTEM
T
Flowchart No.
• Fault indication ..... Warning lamp flashes ten times
4
• Possible cause ...... Faulty diagnostic module (System down fuse burned)
05UOTX-381
Caution
• Before troubleshooting, read SERVICE PRECAUTION on page T -133.
Step 1
1. Disconnect the negative battery cable.
2. Remove the knee protector, and disconnect the clock spring
connectors (Orange and blue).
3. Disconnect all D-sensor (CNT, LH and RH) connectors, and
measure the resistance of each sensor.
Resistance: Approx. 1.2 kO
4. If not as specified, replace the sensor, then go to Step 3.
5. If correct, go to Step 2.
Step 2
1. Reconnect all D-sensor connectors.
2. Disconnect the diagnostic module connector.
3. Measure the resistance between the following terminal-wires
of the diagnostic module connector and a body ground.
Terminal-wire Resistance Action
1C
Approx. 1.2 kO Next, check terminal-wire 1 A (BRJR)
(BR/G)
Other 1.2 kO
Replace wire harness, then go to Step 3
1A
Approx. 1.2 kO Next, check terminal-wire 2L (BR/B)
(BRJR)
Other 1.2 kO Replace wire harness, then go to Step 3
2L
Approx. 1.2 kO Go to Step 3
(BR/B)
Other 1.2 kO Replace wire harness, then go to Step 3
Step 3
1. Reconnect the diagnostic module connector.
2. Reconnect the clock spring connector.
3. Reconnect the negative battery cable.
4. Turn the ignition switch ON, and monitor the warning lamp
operation.
5. If the warning lamp flashes ten times again, replace the di-
agnostic module.
T-143