SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-315
STEP 3. Check for any diagnostic trouble code. (Using
scan tool MB991958, read the diagnostic trouble code.)
Check the front impact sensor (LH).
(1) Disconnect the negative battery terminal.
(2) Alternate the front impact sensor (LH) and front impact
sensor (RH), 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 U0171 set?
YES : Replace the front impact sensor (LH) 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.21
and 22) and front impact sensor (LH) connector A-39
(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.21 and 22) and front impact sensor
(LH) connector A-39 (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 (LH)
connector A-39.
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector