C1932

DTC C1912/C1922/C1932/C1942: TPMS Transmitter Abnormality (Tire Air Pressure Low)

TPMS DTC SET CONDITION
DTC C1912, C1922, C1932 or C1942 is set when the TPMS receiver recognized a low tire pressure from one or more of the TPMS transmitters. At the same time this DTC is set, the TPMS warning light illuminates.

TIRE PRESSURE THRESHOLD VALUES

TIRE PRESSURE THRESHOLD VALUES:

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS DTC TO SET ARE:)
- Low tire inflation pressure
- Punctured tire
- Damaged tire valve grommet and/or valve core
- Defective TPMS transmitter
- Malfunction of the TPMS receiver

DIAGNOSIS

NOTE: Prior to performing troubleshooting for DTC C1912, C 1922, C 1932 or C 1942, first carry out "TPMS Inspection Procedure No.1: The TPMS Warning Light Stays On". If the troubleshooting is not complete and DTC C1912, C 1922, C 1932 or C 1942 is set, carry out troubleshooting as described below.

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness

STEP 1. Use a tire pressure gauge to measure the tire inflation pressure of the TPMS transmitter-fitted tires. Then execute "Tire Pressure Sensor Check" on scan tool MB991958 "Special Function."
(1) Use an accurate tire pressure gauge to measure the tire inflation pressure of the TPMS transmitter-fitted tires, and note the inflation pressures.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.





(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.
(4) Execute "Tire Pressure Sensor Check" for all the TPMS transmitter-fitted tires.
Q:Is the tire inflation pressure shown on scan tool MB991958 within ±10 kPa (1.5 psi) from the actual inflation pressure? [Ambient temperature during measurement must be 0 -50°C (32 -122°F)]
YES: Adjust the tire inflation pressures to the value specified on the tire pressure label. Then execute "Tire Pressure Sensor Check" on scan tool MB991958 "Special Function" to update the tire inflation pressure data on scan tool MB991958. Make sure that the pressures displayed on scan tool MB991958 correspond to the value specified on the tire pressure label. Then go to Step 2.
NO: Replace the TPMS transmitter, where the tire pressure sensor is inaccurate. Then execute "Tire Pressure Sensor ID Registration". Then go to Step 3.

STEP 2. Recheck for the diagnostic trouble code.
Q:Does diagnostic trouble code C1912, C1922, C1932 or C1942 reset?
YES: Replace the TPMS receiver. On completion, execute "Tire Pressure Sensor ID Registration" on scan tool MB991958 "Special Function". Then go to Step 3.
NO: The procedure is complete.

STEP 3.Recheck for diagnostic trouble code.
Q:Does diagnostic trouble code C1912, C1922, C1932 or C1942 reset?
YES: Repeat the troubleshooting from Step 1.
NO: The procedure is complete.