Diagnostic Item 9: Diagnose When The Scan Tool Cannot Receive The Data Sent By TPMS Receiver: Diagnosis

Required Special Tools:

MB991223: Harness Set
MB992006: Extra fine probe

STEP 1. Check joint connector (3) C-03 and TPMS receiver connector C-121 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
CAUTION: The strand end of the twisted wire should be within 10 cm (4.0 inches) from the connector. For details refer to SERVICE PRECAUTIONS .

Fig 1: Identifying Joint Connector C-03
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Identifying TPMS Receiver Connector C-121
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Check the joint connector at the wiring harness side for loose, corroded or damaged terminals, or terminals pushed back in the connector, and also check the short pin behind the connector for corrosion, deformation and delamination.

Q: Are joint connector (3) C-03 and TPMS receiver connector C-121 in good condition?

YES : Go to Step 2.

NO : Repair the damaged parts. Replace the joint connector as necessary.

Fig 3: Identifying Short Pin In Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Check the CAN bus lines joint connector (3) and the TPMS receiver. Measure the resistance between joint connector (3) C-03 and TPMS receiver connector C-121.
CAUTION:
- A digital multimeter should be used. For details refer to SERVICE PRECAUTIONS .
- The test wiring harness should be used. For details refer to SERVICE PRECAUTIONS .
CAUTION: Disconnect the negative battery terminal. For details refer to SERVICE PRECAUTIONS .
1. Disconnect the negative battery terminal.
2. Disconnect joint connector (3) C-03 and TPMS receiver connector C-121, and measure the resistance between the wiring harness side connector of TPMS receiver connector C-121 and joint connector (3) C-03.
  
  Fig 4: Identifying Joint Connector C-03
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  
  Fig 5: Identifying TPMS Receiver Connector C-121
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. Measure the resistance between joint connector (3) C-03 (terminal 8) and TPMS receiver connector C-121 (terminal 1).
  OK: 2 ohms or less
  
  Fig 6: Measuring Resistance Between Joint Connector C-03 Terminal 8 And TPMS Receiver Connector C-121 Terminal 1
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. Measure the resistance between joint connector (3) C-03 (terminal 19) and TPMS receiver connector C-121 (terminal 2).
  OK: 2 ohms or less
  
  CAUTION: Strictly observe the specified wiring harness repair procedure. For details refer to PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES .
  
  Q: Do all the resistances measure 2 ohms or less?
  
  YES : Diagnose the tire pressure monitoring system. Refer to DIAGNOSTIC TROUBLE CODE CHART .
  
  NO : Repair the wiring harness between joint connector (3) C-03 and the TPMS receiver connector C-121.
  
  Fig 7: Measuring Resistance Between Joint Connector C-03 Terminal 19 And TPMS Receiver Connector C-121 Terminal 2
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.