SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-319
STEP 3. Check for any diagnostic trouble code. (Using
scan tool MB991958, read the diagnostic trouble code.)
Check the front impact sensor (RH).
(1) Disconnect the negative battery terminal.
(2) Alternate the front impact sensor (RH) and front impact
sensor (LH), and then install the alternated sensors.
(3) Connect the negative battery terminal.
(4) Erase diagnostic trouble code from memory, and check the
diagnostic trouble code.
Q: Is DTC U0170 set?
YES : Replace the front impact sensor (RH) with a new one.
(Refer to
P.52B-433
). Go to Step 5.
NO : Go to Step 4.
STEP 4. Check the harness wires for open circuit and short
circuit between SRS-ECU connector C-28 (terminal No.23
and 24) and front impact sensor (RH) connector A-53
(terminal No.2 and 1).
NOTE: After inspecting intermediate connector C-33 inspect
the wiring harness. If the intermediate connector C-33 is dam-
aged, repair or replace it.
Q: Are the harness wires between SRS-ECU connector
C-28 (terminal No.23 and 24) and front impact sensor
(RH) connector A-53 (terminal No.2 and 1) in good
condition?
YES : Go to Step 5.
NO : Repair the harness wires between SRS-ECU
connector C-28 and front impact sensor (RH)
connector A-53.
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U0171 set?
YES : Replace the SRS-ECU (Refer to
P.52B-436
).
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to Cope with Intermittent
Malfunction
P.00-15
).
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector