Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test 14: No Power To The Scan Tool
2009 Mazda Tribute 4WD L4-2.5LSECTION Pinpoint Test 14: No Power To The Scan Tool
PINPOINT TEST 14: NO POWER TO THE SCAN TOOL
Normal Operation
The scan tool is connected to the data link connector (DLC) to communicate with the high speed controller area network (HS-CAN) and the medium speed controller area network (MS-CAN). Voltage for the scan tool is provided by circuit (G/R). Ground is provided by circuits (B/G) and (B/L).
Possible Causes
- Fuse
- Wiring, terminals or connectors
- DLC
Diagnostic Procedure
CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
NOTE:Failure to disconnect the battery when instructed will result in false resistance readings. See Battery Disconnect.
Step 1-Step 3:
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.