Mazda 626 - Page 84

ON-BOARD DIAGNOSTIC
STEP INSPECTION
ACTION
4 CHECK CKP SENSOR DIRT
• Disconnect CKP sensor connector.
• Is CKP sensor dirty?
Yes
Clean CKP sensor up, then go to Step 10.
No Go to next step.
5 CHECK CKP SENSOR PULSE WHEEL
MALFUNCTION
• Is CKP sensor pulse wheel damaged?
Yes Replace CKP sensor pulse wheel, then go to step 10.
No Go to next step.
6
INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Check for poor connection (damaged,
pulled-out terminals, corrosion, etc.).
• Are there any malfunctions?
Yes
Repair or replace terminal then go to Step 10.
No
Go to next step.
7
INSPECT CKP SENSOR CIRCUIT FOR OPEN
• Measure resistance between PCM terminal
21 and 22 (harness-side).
• Is resistance within 540—560 i 2?
Yes
Go to next step.
No Repair or replace following harness.
• CKP sensor terminal A and PCM terminal 21
• CKP sensor terminal B and PCM terminal 22
Then go to Step 10.
8 INSPECT CKP SENSOR CIRCUIT FOR SHORT
TO GROUND
• Disconnect CKP sensor connector.
• Check for continuity between PCM terminal
21 (harness-side) and body ground.
• Is there any continuity ?
Yes
Repair or replace harness, then go to Step 10.
No Go to next step.
9
INSPECT CKP SENSOR CIRCUIT FOR SHORT
TO GROUND
• Disconnect CKP sensor connector.
• Check for continuity between PCM terminal
22 (hamess-side) and body ground.
• Is there any continuity?
Yes
Repair or replace harness, then go to next step.
No Go to next step.
10 VERIFY TROUBLESHOOTING OF DTC P0335
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using NGS
tester.
• Start engine.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure.”
(See F1-36 AFTER REPAIR PROCEDURE)
• Are any DTCs present?
Yes
Go to applicable DTC inspection.
(See F1-37 DTC TABLE)
No
Troubleshooting completed.
F1-63