TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS
TSB Revision
WHEEL AND TIRE
31-33
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus
lines.
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus lines (Refer to GROUP 54C
CAN Bus Diagnostics Table
P.54C-11). On
completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
Recheck if DTC C1915, C1925, C1935 or C1945 is set.
(1) Turn the ignition switch (engine starting switch) from the
"LOCK" (OFF) to "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch (engine starting switch) to the
"LOCK" (OFF) position.
Q: Is DTC C1915, C1925, C1935 or C1945 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Check whether the DTC is set again.
Recheck if the DTC is set.
(1) Drive the vehicle for five minutes.
(2) Turn the ignition switch (engine starting switch) from the
"LOCK" (OFF) to "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch (engine starting switch) to the
"LOCK" (OFF) position.
Q: Are the all DTCs C1915, C1925, C1935 and C1945 set?
YES : Replace the TPMS transmitter (Refer to P.31-47) of
all the four wheels, and register ID codes (Refer to
P.31-42). Then go to Step 4.
NO : Register the ID codes (Refer to P.31-42). Then go to
Step 4.
STEP 4. Check whether the DTC is set again.
Recheck if the DTC is set.
(1) Turn the ignition switch (engine starting switch) from the
"LOCK" (OFF) to "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch (engine starting switch) to the
"LOCK" (OFF) position.
Q: Is DTC C1915, C1925, C1935 or C1945 set?
YES : Replace the ETACS-ECU <Vehicles without Keyless
Operation System> (Refer to GROUP 54A ETACS
P.54A-260) or KOS&OSS-ECU <Vehicles with
Keyless Operation System> (Refer to GROUP 42B,
KOS&OSS-ECU
P.42B-132), and register the ID
codes (Refer to P.31-42). Then start over at Step 1.
NO : The procedure is complete.
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