Mazda CX-7 2007 Workshop Manual page 172

STEP
5 INSPECT CMP CIRCUIT FOR SHORT TO
POWER
• Turn ignition switch OFF.
• Disconnect the CMP sensor connector.
• Turn ignition switch to the ON position (Engine
off)
• Measure voltage between the following
terminals:
— CMP sensor connector terminal C (harness-
side) and body ground
— CMP sensor connector terminal B (harness-
side) and body ground
• Is the voltage B+?
6 INSPECT CMP CIRCUIT FOR SHORT TO
GROUND
• Inspect for continuity between the following
terminal and body ground:
— CMP sensor connector terminal A (harness-
side)
— CMP sensor connector terminal C (harness-
side)
• Is there continuity?
7 INSPECT CMP CIRCUITS FOR SHORT CIRCUIT
• Inspect for continuity between CMP sensor
connector terminals A and C (harness-side).
• Is there continuity?
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
9 INSPECT CMP CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between the following
circuits:
— CMP sensor terminal A (harness-side) and
main relay
— CMP sensor terminal B (harness-side) and
PCM terminal 2P (harness-side)
— CMP sensor terminal C (harness-side) and
PCM terminal 2S (harness-side)
• Is there continuity?
10 INSPECT CMP SENSOR
• Turn the ignition switch off.
• Perform the CMP sensor inspection.
(See01-40-45 CAMSHAFT POSITION (CMP)
SENSOR INSPECTION[L3 WITH TC].)
• Is the CMP sensor normal?
11 VERIFY CMP SENSOR INSTALLATION
• Verify the CKP sensor installation.
(See01-40-45 CAMSHAFT POSITION (CMP)
SENSOR REMOVAL/INSTALLATION[L3 WITH
TC].)
• Is the CMP sensor installed correctly?
12 VERIFY VALVE TIMING MECHANISM
INSTALLATION
• Verify the valve timing mechanism installation
for the following parts:
— Timing chain misinstallation
— Loose camshaft sprocket lock bolt
— Loose crankshaft pulley lock bolt
• Is the valve timing mechanism installed
correctly?
01-02–130
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the suspected wiring harness, then go to
Step 15.
No Go to the next step.
Yes Repair or replace the suspected wiring harness, then go to
Step 15.
No Go to the next step.
Yes Repair or replace the suspected wiring harness, then go to
Step 15.
No Go to the next step.
Yes Repair the terminal, then go to Step 15.
No Go to the next step.
Yes Go to Step 11.
No Repair or replace the suspected wiring harness, then go to
Step 15.
Yes Go to the Step 15.
No Replace the CMP sensor and go to Step 15.
Yes Go to the next step.
No Reinstall the CKP sensor and go to Step 15.
Yes Go to the next step.
No Reinstall the following parts and go to Step 15.
• Timing chain
• Camshaft sprocket
• Crankshaft pulley
ACTION