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 1: No Power In All Ignition Switch Positions
2009 Mazda Tribute 4WD L4-2.5LSECTION Pinpoint Test 1: No Power In All Ignition Switch Positions
PINPOINT TEST 1: NO POWER IN ALL IGNITION SWITCH POSITIONS
Normal Operation
The ignition switch receives fused battery voltage along circuit (L/R) from smart junction box (SJB) fuse 27 (20A). The ignition switch then sends that voltage out to various systems depending on ignition switch position. The ignition switch has 4 possible states:
- OFF - No power on any circuits
- ACC - Power on circuit (V/G)
- RUN - Power on circuits (V/G) and (W/O)
- START - Power on circuits (W/O), (L/W) and (L/BR)
Possible Causes
- Fuse
- Wiring, terminals or connectors
- Ignition switch
- SJB
Diagnostic Procedure
CAUTION:Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Step 1-Step 2:
RENDER: 1.0x
NO RELATED
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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.