Mazda 3 Workshop Manual page 136

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
INSPECT CMP SENSOR CIRCUIT FOR
SHORT TO GND
• Turn the ignition switch off.
• Inspect for continuity between the following
terminals:
4
- CMP sensor terminal A (wiring
harness-side) and body GND
- CMP sensor terminal B (wiring
harness-side) and body GND
• Is there continuity?
INSPECT CMP SENSOR CIRCUIT FOR
SHORT TO POWER SUPPLY
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between the following
terminals:
5
- CMP sensor terminal B (wiring
harness-side) and body GND
- CMP sensor terminal C (wiring
harness-side) and body GND
• Is the voltage B+?
INSPECT CMP SENSOR
• Inspect the CMP sensor.
6
(See CAMSHAFT POSITION (CMP)
SENSOR INSPECTION
• Is there any malfunction?
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
7
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
INSPECT CMP SENSOR CIRCUIT FOR
OPEN CIRCUIT
• Turn the ignition switch off.
8
• Inspect for continuity between the following
terminals:
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Repair or replace the wiring harness for a
Yes
possible short to GND, then go to Step 9.
No Go to the next step.
Repair or replace the wiring harness for a
Yes possible short to power supply, then go to
Step 9.
No Go to the next step.
Replace the CMP sensor, then go to Step 9.
Yes
(See CAMSHAFT POSITION (CMP)
SENSOR REMOVAL/INSTALLATION
No Go to the next step.
Repair or replace the terminal, then go to
Yes
Step 9.
No Go to the next step.
Yes Go to the next step.
Repair or replace the wiring harness for a
No
possible open circuit, then go to the next step.
- automotive repair manuals website
[Z6].)