Mazda 3 Workshop Manual page 340

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Verify that the CKP sensor connector is
connected securely.
• Is the connector normal?
INSPECT CKP CIRCUIT FOR SHORT
TO POWER
• Turn the ignition switch to off.
• Disconnect the CKP sensor connector.
• Turn the ignition switch to the ON
position (Engine off).
5
• Measure the voltage between following
terminals
- CKP sensor terminal A
- CKP sensor terminal B
• Is any voltage reading?
INSPECT CKP CIRCUIT FOR SHORT
TO GROUND
• Inspect for continuity between following
terminal and body ground:
6 - CKP sensor terminal A (wiring
harness-side)
- CKP sensor terminal B (wiring
harness-side)
• Is there continuity?
INSPECT CKP CIRCUITS FOR SHORTS
• Inspect for continuity between CKP
7 sensor terminals A and B (wiring harness-
side).
• Is there continuity?
INSPECT POOR CONNECTION OF
PCM CONNECTOR
• Disconnect the PCM connector.
8
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
INSPECT CKP CIRCUIT FOR OPEN
CIRCUIT
9
• Inspect for continuity between following
terminals:
Downloaded from
Yes
No Go to the next step.
Yes
No Go to the next step.
Yes
No Go to the next step.
Yes Repair the terminal, then go to Step 11.
No Go to the next step.
Yes Go to Step 11.
No
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Repair or replace the wiring harness, then go to
Step 11.
Repair or replace the wiring harness, then go to
Step 11.
Repair or replace the wiring harness, then go to
Step 11.
Repair or replace the suspected wiring harness,
then go to Step 11.
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