2. Preparation before checking
Before maintenance, carefully read the section 1.3 about the safety rules for air bag maintenance.
In addition, following preparation work shall be carried out.
(1) Remove the negative ground wire from the battery and wait for at least 3min.
(2) Remove the driver and front passenger air bag modules, keep the air bag module upwards
when storing the module (See the removal methods in Section IV).
(3) Disconnect the interface of the driver and front passenger air bag modules, air bag ECU
interface, as shown in Fig. 5-8.
Fig. 5-8
3. Check for too low or too high voltage
(1) Connect the negative ground wire on the battery, turn on the ignition switch at the position of
ON.
(2) Measure the PW voltage at the end of the air bag harness.
(3) Normal voltage: 10~14V.
4. Check for harness and interface
(1) Exam the connection of the air bag harness. Check if the resistance is below 1.
(2) Check whether the other harnesses and the corresponding terminals are connected.
(3) Check all the leads of the harness for damage.
(4) Check the interface of the harness for damage.
5. Check for air bag ECU
(1) Connect the air bag ECU with the air bag harness. See Fig. 5-8.
(2) Connect the negative ground wire to the battery, and wait for at least 3min.
(3) Turn the ignition switch to the position of ACC or ON and wait for at least 20s.
(4) Eliminate the flash DTC by the diagnostic instrument and read out the flash DTC.
6. Check for the driver air bag module
(1) Turn the ignition switch to position LOCK.
(2) Remove the negative ground wire from the battery and wait for at least 3min.
(3) Connect the driver air bag module. See Fig. 5-9.
Fig. 5-9
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