Mitsubishi Montero (2004+). Manual - part 490

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-31

DTC 22/26/31/35/39: TPMS Transmitter Abnormality (Tire Pressure Sensor ID Reception Failure)

FRONT TIRE
(LH)

FRONT TPMS
ANTENNA (LH)

ANTENNA

CONTROL
CIRCUIT

FRONT TIRE
(RH)

FRONT TPMS
ANTENNA (RH)

ANTENNA

CONTROL
CIRCUIT

REAR TIRE
(LH)

SPARE TIRE

REAR  TPMS
ANTENNA (LH)

ANTENNA

CONTROL
CIRCUIT

REAR TIRE
(RH)

REAR  TPMS
ANTENNA (RH)

ANTENNA

CONTROL
CIRCUIT

RECEIVING CIRCUIT 

TPMS RECEIVER

EEPROM

CPU

TPMS Transmitter Data Transmission Circuit

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-32

.

CIRCUIT OPERATION
The TPMS receiver receives data from the TPMS 
transmitters through the TPMS antennas and feeder 
cables.

.

TPMS DTC SET CONDITION
DTC 22, 26, 31, 35 or 39 is set if the TPMS receiver 
cannot receive data from the TPMS transmitters nor-
mally, even when the tire pressure sensor IDs have 
been registered. At the same time this DTC is set, 
the TPMS warning light flashes.

NOTE: DTC is also set for the spare tire. This is not a 
fault. The spare tire is stationary (fixed). Therefore, 
its transmitter roll switch does not work, and the 
TPMS transmitter transmits its tire pressure data 
once every 1 hour. This transmission timing causes 
the DTC to be set for the spare tire. Do not attempt to 
diagnose the spare tire for this DTC.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS DTC TO SET ARE:) 

• Installing a tire/wheel that does not contain the 

TPMS transmitter

• Tire pressure sensor IDs are not registered yet

• Damaged feeder cable or connector

• Malfunction of TPMS transmitter

• Malfunction of TPMS antenna

• Malfunction of TPMS receiver

.

AC308264

AC307575

G-28-1 (GR)
(GREEN TAPING)

CONNECTORS: 
     G-28, G-28-1, G-28-3, G-28-4, G-28-5

AB

TPMS RECEIVER

G-28-4 (GR)
(BROWN TAPING)

G-28

G-28-3 (GR)
(BLUE TAPING)

G-28-5 (GR)
(WHITE TAPING)

AC308265 AB

G-28-11 (GR)

CONNECTORS: 
     G-28-2, G-28-8, G-28-10, G-28-11

G-28-2 (GR)

G-28-8 (GR)

G-28-10 (GR)

AC308266 AB

G-28-9 (GR)

CONNECTORS: G-28-6, G-28-7, G-28-9

G-28-6 (GR)

G-28-7 (GR)

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-33

DIAGNOSIS
NOTE: To help determine which TPMS transmitter is defective, 
make a note of the tire pressure sensor ID and tire number, 
which the DTC indicates, prior to the troubleshooting. Also exe-
cute "Tire Pressure Sensor ID Registration" on scan tool 
MB991958 "Special Function", and make a note for the regis-
tered tire pressure sensor IDs.

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

.

STEP 1. Visually check whether the wheels contain the 
TPMS transmitter.

Check the road wheel tires and the spare tire. On TPMS trans-
mitter-fitted tires, the TPMS transmitter is secured using a 
valve nut. Check for the valve nut.
Q: Are the wheels fitted with the TPMS transmitter?

YES : Go to Step 2.
NO :  Install a TPMS transmitter-fitted wheel (the spare tire 

should also be fitted with the TPMS transmitter). And 
then execute "Tire Pressure Sensor ID Registration" 
(Refer to 

P.31-89

). And then go to Step 18.

AC307589

AB

TPMS VALVE NUT

TIRE PRESSURE MONITORING SYSTEM (TPMS) DIAGNOSIS

TSB Revision

WHEEL AND TIRE

31-34

STEP 2. Check each tire pressure sensor ID by executing 
"Tire Pressure Sensor Check" on scan tool MB991958 
"Special Function."

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Execute "Tire Pressure Sensor Check" for all tires to check 

each tire pressure sensor ID (Refer to 

P.31-91

).

Q: Is the tire pressure sensor ID, which DTC indicates, 

shown on the scan tool?
YES : Data can be received from the TPMS transmitters 

normally. Therefore, it is judged that the DTC is set 
due to a defective TPMS transmitter roll switch. 
Replace the TPMS transmitter of the road wheel, 
which the DTC indicates (Refer to 

P.31-97

). And then 

go to Step 3. (The DTC will be also set for the spare 
tire. However, the spare tire TPMS transmitter does 
not have to be replaced).

NO <when the recognized tire pressure sensor ID does 
not correspond to the registered one> : Execute "Tire 

Pressure Sensor ID Registration" (Refer to 

P.31-89

). 

And then go to Step 18.

NO <when one (or more) of the tire pressure sensor 
ID(s) cannot be recognized> : Replace the relevant TPMS 

transmitter (Refer to 

P.31-97

). And then go to Step 3.

STEP 3. Execute "Tire Pressure Sensor ID Registration" on 
scan tool MB991958 "Special Function."
Q: Is the "Tire Pressure Sensor ID Registration" complete 

(Have the tire pressure sensor IDs been registered)?
YES : Go to Step 18.
NO <the tire pressure sensor ID (front-LH) cannot be 
recognized> : Go to Step 4.
NO <the tire pressure sensor ID (front-RH) cannot be 
recognized> : Go to Step 7.
NO <the tire pressure sensor ID (rear-LH) cannot be 
recognized> : Go to Step 10.
NO <the tire pressure sensor ID (rear-RH) cannot be 
recognized> : Go to Step 13.
NO <none of the tire pressure sensor IDs can be 
recognized> : Replace the TPMS receiver (Refer to 

P.31-96

). And then go to Step 17.

AC306409AF

MB991911

MB991824

MB991827