Mazda 6 2002, Workshop Manual

Page: 263 / 1248

ON-BOARD DIAGNOSTIC
F–133
F
F FUEL AND EMISSION CONTROL SYSTEMS ON-BOARD DIAGNOSTIC
STEP INSPECTION ACTION
6 INSPECT CMP CIRCUIT FOR SHORT TO
GROUND
•
Inspect continuity between following terminal
and body ground:
— CMP sensor connector terminal A (harness-
side)
— CMP sensor connector terminal B (harness-
side)
•
Is there any continuity?
Yes Repair or replace suspected harness, then go to Step 15.
No Go to next step.
7 INSPECT CMP CIRCUITS FOR SHORTS
•
Inspect continuity between CMP sensor
connector terminals A and B (harness-side).
•
Is there any continuity?
Yes Repair or replace suspected harness, then go to Step 15.
No Go to next step.
8 INSPECT POOR CONNECTION OF PCM
CONNECTOR
•
Disconnect PCM connector.
•
Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•
Is there any malfunction?
Yes Repair terminal, then go to Step 15.
No Go to next step.
9 INSPECT CMP CIRCUIT FOR OPEN CIRCUIT
•
Inspect continuity between following circuits:
— CMP sensor terminal A (harness-side) and
PCM terminal 2M (harness-side)
— CMP sensor terminal B (harness-side) and
PCM terminal 2J (harness-side)
•
Is there continuity?
Yes Go to Step 11.
No Repair or replace suspected harness, then go to Step 15.
10 INSPECT CMP SENSOR
•
Turn ignition key to OFF.
•
Perform CMP sensor inspection.
(See
F–55 CAMSHAFT POSITION (CMP)
SENSOR INSPECTION .)
•
Is CMP sensor okay?
Yes Go to Step 15.
No Replace CMP sensor and go to step 15.
11 VERIFY CKP SENSOR INSTALLATION
•
Verify CKP sensor installation.
(See
F–54 CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION .)
•
Is CKP sensor installed correctly?
Yes Go to next step.
No Reinstall CKP sensor and go to Step 15.
12 VERIFY VALVE TIMING MECHANISM
INSTALLATION
•
Verify valve timing mechanism installation for
following parts:
— Timing chain misinstallation
— Loose camshaft sprocket lock bolt
— Loose crankshaft pulley lock bolt
•
Is valve timing mechanism installed correctly?
Yes L3 : Go to the next step.
L8, LF : Go to Step 15.
No Reinstall valve timing mechanism and go to Step 15.
13 INSPECT STOPPER PIN MECHANISM
•
Remove timing chain.
•
Inspect stopper pin.
(See B–32 VARIABLE VALVE TIMING
ACTUATOR INSPECTION.)
•
Is stopper pin mechanism okay?
Yes Go to next step.
No Replace variable valve timing actuator, then go to Step 15.
14 INSPECT ROTOR POSITION
•
Remove variable valve timing actuator.
(See
B–32 VARIABLE VALVE TIMING
ACTUATOR REMOVAL/INSTALLATION .)
•
Is rotor position at maximum valve timing
retard?
Yes VARIABLE VALVE TIMING MECHANISM IS NORMAL
Note
•
This DTC detected by intermittent concern.
•
Intermittent concern might be removed by cleaning
mode of variable valve timing control function.
Go to next step.
No Replace variable valve timing actuator, then go to next step.