Pinpoint Test

1. NOTE: Make sure that all aftermarket electronic equipment has been disconnected (if possible) and that the customer has been questioned about the kinds of electronic equipment they may have been using in the vehicle when this issue was identified.

Using a scan tool, perform self-test.

• Is Diagnostic Trouble Code (DTC) U0140: 87 present? 

• Yes:  REFER to DIAGNOSTIC ROUTINE E .
• No:  GO to step 2 .

1. Connect the scan tool.
2. Ignition ON.
3. Using a scan tool, view Body Control Module (BCM) Parameter Identifications (PIDs).
4. Monitor the Tire Pressure Monitoring System (TPMS) Parameter Identification (PID) TPMS_STAT.

• Does the Body Control Module (BCM) Parameter Identification (PID) TPMS_STAT display SYSTEM FAULT? 

• Yes:  GO to step 3 .
• No:  GO to step  5 .

1. Train all 4 Tire Pressure Monitoring System (TPMS) sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA)  or REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT) .

• Did all of the Tire Pressure Monitoring System (TPMS) sensors transmit correctly and did the horn sound when each sensor transmitted to the Body Control Module (BCM)? 

• Yes:  The system is operating correctly at this time. The concern may have been caused by Radio Frequency Interference (RFI). REFER to Radio Frequency Interference  and REFER to Tire Pressure Monitoring System (TPMS)  PID Definitions for information on locating sources of Radio Frequency Interference (RFI).
• No:  GO to step 4 .

1. Move the vehicle to rotate the wheels at least one-fourth of a turn. Leave the vehicle doors open.
2. Attempt to train known good Tire Pressure Monitoring System (TPMS) sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA)  or REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT) .

• Did the known good Tire Pressure Monitoring System (TPMS) sensors transmit correctly and did the horn sound when the known good Tire Pressure Monitoring System (TPMS) sensors transmitted to the Body Control Module (BCM)? 

• Yes:  If some of the sensors trained, INSTALL a new Tire Pressure Monitoring System (TPMS) sensor for each sensor that failed to train. REFER to Tire Pressure Monitoring System (TPMS) Sensor .

  If all the known good sensors trained, INSTALL new sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor .

• No:  GO to step 5 .

• corrosion (install new connector or terminals - clean module pins).
• damaged or bent pins - install new terminals/pins.
• pushed-out pins - install new pins as necessary.

1. Reconnect the Body Control Module (BCM) connectors. Make sure they seat and latch correctly.
2. Operate the system and determine if the concern is still present.

• Is the concern still present? 

• Yes:  CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, discontinue this test and follow Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new Body Control Module (BCM). REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) or REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) .
• No:  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. CLEAR the Diagnostic Trouble Codes (DTCs).