11. Check for driver safety belt pre-tensioner
(1) Measure the resistance between the RLP+ and RLP- at one side of the air bag ECU. Normal
resistance shall be above 1M.
(2) Measure the resistance between the RLP+ at one side of the air bag ECU and RLP+ at one
side of the driver safety belt pre-tensioner. Normal resistance shall be within 1.
(3) Measure the resistance between the RLP- at one side of the air bag ECU and RLP- at one side
of the driver safety belt pre-tensioner. Normal resistance shall be within 1.
12. Check for front passenger safety belt pre-tensioner
(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 interface on the front passenger safety belt pre-tensioner. See Fig. 5-10.
(4) Connect the negative ground wire on the battery and wait for at least 3min.
(5) Turn the ignition switch to the position of ACC or ON and wait for at least 20s.
(6) Eliminate the flash DTC by the diagnostic instrument and read out the flash DTC.
13. Check for front passenger safety belt pre-tensioner circuit
(1) Measure the resistance between the RRP+ and RRP- at one side of the air bag ECU. Normal
resistance shall be above 1M.
(2) Measure the resistance between the RRP+ at one side of the air bag ECU and RRP+ at one
side of the front passenger safety belt pre-tensioner. Normal resistance shall be within 1.
(3) Measure the resistance between the RRP- at one side of the air bag ECU and RRP- at one
side of the front passenger safety belt pre-tensioner. Normal resistance shall be within 1.
14. Check for clock spring
(1) Unplug the interface between the air bag ECU and the clock spring. See Fig. 5-10.
(2) Measure the resistance at one side of the air bag ECU. Normal resistance shall be above 1.
(3) Measure the resistance between the A+ at one side of the clock spring and A+ at one side of
the air bag ECU. Normal resistance shall be within 1.
(4) Measure the resistance between the A- at one side of the clock spring and A- at one side of the
air bag ECU. Normal resistance shall be within 1.
IV. Check for SRS warning lamp circuit fault
In the normal conditions, when the ignition switch turns from the position LOCK to ACC or ON, the
SRS warning lamp shall keep lighting for 5s, and then go out automatically; if there is any faults in
the air bag system, the SRS warning lamp will keep lighting and never go out. Read out the flash
DTC according to the normal process.
Provided that the lamp keeps lighting when the ignition switch is at the position of LOCK, or keeps
dark when the switch is at the position of ACC or ON, there must be malfunctions in the SRS
warning lamp circuit. With reference to the air bag system wiring diagram (see Fig. 5-7), check the
circuit as per the following process.
1. Check for constant illumination when ignition switch at LOCK
(1) Turn the ignition switch to position LOCK.
(2) Remove the negative ground wire from the battery and wait for at least 3min.
(3) Unplug the air bag ECU interface.
(4) Connect the ground wire to the battery negative pole and wait for at least 3min.
(5) Check whether the SRS warning lamp goes out or not. If it goes out, the air bag ECU shall be
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