Vehicle Tracking Module (VTM)

B1007-18-EXTERNAL BATTERY VOLTAGE - CIRCUIT VOLTAGE BELOW THRESHOLD

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
When the ignition is cycled on.

- Set Condition:
The Vehicle Tracking Module (VTM) monitors the input voltage. This Diagnostic Trouble Code (DTC) is set when the input voltage is below a certain threshold for greater than 2 seconds.





1. CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCs

NOTE: Make sure the battery is fully charged before proceeding.

1. Using the scan tool, read the active PCM DTCs.

Are there any battery or charging system DTCs present?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 2

2. TEST FOR AN INTERMITTENT CONDITION
1. Using the scan tool, record and erase the Video Tracking Module DTCs.
2. Cycle the ignition switch from on to off, wait five seconds and then back to on.
3. Using the scan tool, read the Video Tracking Module DTCs.

Does the scan tool display: B1007-18-EXTERNAL BATTERY VOLTAGE - CIRCUIT VOLTAGE BELOW THRESHOLD as active?

Yes

- Go To 3

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE FUSED B(+) CIRCUIT FOR AN OPEN OR EXCESSIVE RESISTANCE
1. Turn the ignition off.
2. Disconnect the Vehicle Tracking Module harness connector.
3. Ignition on, engine not running.
4. Using a 12-volt test light connected to ground, check the Fused B(+) circuit in the Vehicle Tracking Module harness connector.
5. The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Replace the Vehicle Tracking Module. Vehicle Tracking Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open or excessive resistance in the Fused B(+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.