Pinpoint Test E: DTCs B106E, B106F, B1217 And B1218
Tire Pressure Monitoring System
Pinpoint Test E: DTCs B106E, B106F, B1217 and B1218
Refer to Wiring Diagram Set 118, Tire Pressure Monitoring System (TPMS) for schematic and connector information. Diagrams By Number
Normal Operation
The Tire Pressure Monitoring System (TPMS) uses the horn as a feedback signal during TPMS sensor training and activation by sending a ground signal to the Body Control Module (BCM). When the BCM receives this ground signal it activates the horn relay and sounds the horn.
The TPMS monitors the circuit for shorts to voltage, ground and opens. If one of these conditions is detected, the appropriate DTC sets.
The TPM/VSM utilizes a Field-Effect Transistor (FET) (in place of a fuse) to protect itself during a short circuit condition, the FET is also known as a solid state driver. The FET is only designed to withstand a certain amount of use.
The TPMS keeps track of how many times DTC B106E is set and once that counter reaches a predetermined number (based off of FET durability) DTC B106F (and usually B1342) set. DTCs B1217, B1218 and/or B106E also set along with B106F. The only way to clear B106F is by installing a new Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM). Repair the circuit conditions that set DTCs B1217, B1218 and/or B106E before installing a new TPM/VSM.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- TPM/VSM
- BCM module
PINPOINT TEST E: DTCs B106E, B106F, B1217 AND B1218
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E1 CHECK THE HORN OPERATION
NOTICE: If DTC B106F is present, correct the fault condition prior to installing a new Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM). Failure to correct the fault condition first may cause damage to the new TPM/VSM, resulting in a repeat repair.
- Push the horn pad.
- Does the horn sound?
Yes
GO to E2.
No
GO to Horn Testing and Inspection to diagnose the horn.
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E2 CHECK THE HORN CIRCUIT FUNCTION
NOTICE: If the jumper wire fails, refer to the Wiring Diagrams to identify the possible causes of the circuit short. After the repair: If no DTCs are present, test the system for normal operation. If DTC B106E is present, Clear the DTCs and repeat the self-test (required to enable the horn driver if DTC B106E is present). Test the system for normal operation. If DTC B106F is present, install a new TPM/VSM. Refer to Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan or Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback. Test the system for normal operation. Diagrams By Number
- Ignition OFF.
- Disconnect: TPM/ VSM C4321B.
- Ignition ON.
- Connect a fused jumper wire between the TPM/ VSM, C4321B-9 CRH03 (BN), harness side and ground.
- Does the horn sound?
Yes
REMOVE the jumper wire. GO to E3
No
REMOVE the jumper wire. REPAIR circuit CRH03 (BN) for an open circuit. CLEAR the DTCs and REPEAT the self-test.
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E3 CHECK FOR CORRECT TPMS OPERATION
- Disconnect all the TPM/ VSM electrical connectors.
- Check the connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all the TPM/ VSM connectors and make sure that they are seated correctly.
- Is the concern still present?
Yes
INSTALL a new TPM/VSM. REFER to Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan or Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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