Diagnostic Routine H

Diagnostic Routine H

Diagnostic Overview

The Body Control Module Will Not Enter TPMS Sensor Training Mode

One or More Tire Pressure Monitoring System Sensors Do Not Train and No DTCs are Present

Normal Operation and Fault Conditions

REFER to Tire Pressure Monitoring System (TPMS) Function .

If the vehicle has been stationary for more than 30 minutes, the TPMS (Tire Pressure Monitoring System) sensors go into a "sleep mode" to conserve battery power. It becomes necessary to wake them up so they transmit the latest tire pressure information to the BCM (Body Control Module). REFER to Tire Pressure Monitoring System (TPMS) Sensor Activation Tire Pressure Monitoring System (TPMS) Sensor Activation.

Visual Inspection and Diagnostic Pre-checks

- Inspect for customer electronic devices, such as a cell phone charger or GPS (Global Positioning System) unit.

- Inspect for non- OEM (Original Equipment Manufacturer) wheel or run-flat tires.

Pinpoint Test

1. CHECK THE IGNITION SWITCH INPUT

1. Ignition ON.

2. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

3. Monitor the BCM (Body Control Module) PID (Parameter Identification) IGN_SW_STATE with the ignition in the RUN position.

Does the PID (Parameter Identification) indicate the correct ignition switch position?






2. CHECK FOR VEHICLE SPEED-RELATED DTCs (Diagnostic Trouble Codes) IN THE PCM (Powertrain Control Module)

1. Using a scan tool, perform PCM (Powertrain Control Module) self-test.

Is DTC (Diagnostic Trouble Code) P0500 present?






3. CHECK THE STOPLAMP OPERATION

1. Ignition ON.

2. Press and release the brake pedal while monitoring the stoplamps.

Do the stoplamps operate correctly?






4. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all BCM (Body Control Module) connectors.

3. Repair:

- 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 BCM (Body Control Module) 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?