Mazda 2002 6 Workshop Manual page 263

STEP
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?
7 INSPECT CMP CIRCUITS FOR SHORTS
• Inspect continuity between CMP sensor
connector terminals A and B (harness-side).
• Is there any continuity?
8 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
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?
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?
11 VERIFY CKP SENSOR INSTALLATION
• Verify CKP sensor installation.
(See F–54 CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION.)
• Is CKP sensor installed correctly?
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?
13 INSPECT STOPPER PIN MECHANISM
• Remove timing chain.
• Inspect stopper pin.
(See B–32 VARIABLE VALVE TIMING
ACTUATOR INSPECTION.)
• Is stopper pin mechanism okay?
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?
ON-BOARD DIAGNOSTIC
F F UEL AND EMISSION CONTROL SYSTEMS
INSPECTION
ON-BOARD DIAGNOSTIC
Yes Repair or replace suspected harness, then go to Step 15.
No Go to next step.
Yes Repair or replace suspected harness, then go to Step 15.
No Go to next step.
Yes Repair terminal, then go to Step 15.
No Go to next step.
Yes Go to Step 11.
No Repair or replace suspected harness, then go to Step 15.
Yes Go to Step 15.
No Replace CMP sensor and go to step 15.
Yes Go to next step.
No Reinstall CKP sensor and go to Step 15.
Yes L3: Go to the next step.
L8, LF: Go to Step 15.
No Reinstall valve timing mechanism and go to Step 15.
Yes Go to next step.
No Replace variable valve timing actuator, then go to Step 15.
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.
ACTION
F–133
F