Mazda CX-7 2007 Workshop Manual page 89

STEP
3 INSPECT MAP/BOOST AIR TEMPERATURE
SENSOR CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the MAP/boost air temperature
sensor connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Is there any malfunction?
4 INSPECT MAP/BOOST AIR TEMPERATURE
SENSOR CIRCUIT FOR SHORT TO POWER
SUPPLY
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between the following
terminals:
— MAP/boost air temperature sensor terminal
B (wiring harness-side) and body ground
— MAP/boost air temperature sensor terminal
A (wiring harness-side) and body ground
• Is the voltage B+?
5 INSPECT BOOST AIR TEMPERATURE SENSOR
• Inspect the boost air temperature sensor
connector.
(See01-40-31 BOOST AIR TEMPERATURE
SENSOR INSPECTION[L3 WITH TC].)
• Is there any malfunction?
6 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Is there any malfunction?
7 INSPECT MAP/BOOST AIR TEMPERATURE
SENSOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Measure the voltage between the following
terminals:
— MAP/boost air temperature sensor terminal
B (wiring harness-side) and PCM terminal
2N (wiring harness-side)
— MAP/boost air temperature sensor terminal
A (wiring harness-side) and PCM terminal
2AV (wiring harness-side)
• Is there continuity?
8 VERIFY TROUBLESHOOTING OF DTC P0098
COMPLETED
• Make sure to connect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
9 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
WM: DTC P01XX
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Repair or replace the terminal, then go to Step 8.
No Go to the next step.
Yes Repair or replace the wiring harness for a possible short to
power supply, then go to Step 8.
No Go to the next step.
Yes Replace the MAP/boost air temperature sensor, then go to
Step 8.
(See01-40-29 MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR/BOOST AIR TEMPERATURE SENSOR
REMOVAL/INSTALLATION[L3 WITH TC].)
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 8.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open
circuit, then go to the next step.
Yes Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No DTC troubleshooting completed.
ACTION
01-02–47
01-02