Mazda CX-7 2007 Workshop Manual page 243

STEP
16 INSPECT POWER SUPPLY FOR CONTROL
CIRCUIT OF DRIVE-BY-WIRE-RELAY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between drive-by-wire-
relay terminal E (harness-side) and body
ground.
• Is the voltage B+?
17 INSPECT DRIVE-BY-WIRE-RELAY
• Inspect the drive-by-wire-relay.
(See09-21-4 RELAY INSPECTION.)
• Is the drive-by-wire-relay normal?
18 INSPECT POWER CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch to off.
• Check for continuity between drive-by-wire-
relay terminal C (harness-side) and PCM
terminal 1BF (harness-side).
• Is there continuity?
19 INSPECT CONTROL CIRCUIT FOR OPEN
CIRCUIT
• Check for continuity between drive-by-wire-
relay A (harness-side) and PCM terminal 1AX
(harness-side).
20 INSPECT THROTTLE POSITION SENSOR NO.1
OUTPUT VOLTAGE
• Turn the ignition switch to off.
• Connect the PCM connector.
• Turn ignition switch to the ON position (Engine
off).
• Check voltage between PCM terminal 2AK and
body ground.
• Is the voltage 0.40— 0.60 V?
21 INSPECT THROTTLE POSITION SENSOR NO.2
OUTPUT VOLTAGE
• Turn ignition switch to the ON position (Engine
off).
• Check the voltage between PCM terminal 2AL
and body ground.
• Is the voltage 4.40— 4.60 V?
22 VERIFY TROUBLESHOOTING OF DTC P2101
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition switch to the ON position (Engine
off).
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine and run it at idle.
• Turn ignition switch to OFF then ON (Engine
off).
• Is the same DTC present?
23 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
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit
between drive-by-wire-relay terminal E and main relay
terminal C, then go to Step 22.
Yes Go to the next step.
No Replace the drive-by-wire-relay, then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit,
then go to Step 22.
Yes Go to the next step.
No Check the throttle position sensor No.1 and related circuits
and terminal.
(See01-40-32 THROTTLE POSITION (TP) SENSOR
INSPECTION[L3 WITH TC].)
Repair or replace if necessary, then go to Step 22.
Yes Go to the next step.
No Check the throttle position sensor No.2 and related circuits
and terminal.
(See01-40-32 THROTTLE POSITION (TP) SENSOR
INSPECTION[L3 WITH TC].)
Repair or replace as necessary, 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 Troubleshooting completed.
ACTION
01-02–201
01-02