Mazda CX 7. Manual — part 64
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–211
01-02
End Of Sie
4
INSPECT APP SENSOR CONNECTOR FOR
POOR CONNECTION
• Disconnect the APP sensor connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the suspected terminal, then go to Step
10.
No
Go to the next step.
5
INSPECT APP SENSOR
• Perform the APP sensor inspection.
(See01-40-33 ACCELERATOR PEDAL
POSITION (APP) SENSOR INSPECTION[L3
WITH TC].)
• Is the APP sensor normal?
Yes
Go to the next step.
No
Replace the APP sensor, then go to Step 10.
6
INSPECT APP1 SIGNAL CIRCUIT FOR SHORT
TO POWER SUPPLY
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage between APP sensor
terminal F (harness-side) and body ground.
• Is the voltage above 4.8 V?
Yes
Repair or replace a short to power supply. Then, go to Step
10.
No
Go to the next step.
7
VERIFY APP SENSOR GROUND CIRCUIT FOR
OPEN CIRCUIT
• Disconnect the PCM connector.
• Inspect for continuity between APP sensor
terminal E (harness side) and PCM terminal
1U (harness side).
• Is there continuity?
Yes
Repair or replace for an open circuit between APP sensor
terminal F (harness-side) and PCM connector terminal 1Y
(harness-side). Then, go to Step 10.
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair the terminal, then go to Step 10.
No
Go to the next step.
9
VERIFY TP SIGNAL CIRCUIT FOR SHORT TO
POWER SUPPLY CIRCUIT
• Inspect for continuity between throttle body
terminals D and F (harness side).
• Is there continuity?
Yes
Repair or replace the suspected wiring harness, then go to
the next step.
No
Go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P2123
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 warm it up completely.
• Is the same DTC present?
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.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
1871-1U-06B(01-02).fm 211 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–212
DTC P2127[L3 WITH TC]
id010239811900
DTC P2127
Accelerator pedal position (APP) sensor No.2 circuit low input
DETECTION
CONDITION
• The PCM monitors the APP sensor No.2 signal. If the PCM detects that the APP sensor No.2 voltage is
below 0.2 V, the PCM determines that the APP sensor No.2 circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
POSSIBLE
CAUSE
• APP sensor malfunction
• Connector or terminal malfunction
• Open circuit between APP sensor terminal C and PCM terminal 1AC
• Short to ground circuit between APP sensor terminal C and PCM terminal 1AC
• Open circuit between APP sensor terminal A and PCM terminal 1AJ
A
C
B
PCM
APP SENSOR
3
4
5
6
3
7
1AJ
1AC
1AV
D
E
F
APP SENSOR
WIRING HARNESS SIDE CONNECTOR
PCM
WIRING HARNESS SIDE CONNECTOR
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1E
1A
1I
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
1T
1P
1H
1D
1L
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1G
1C
1K
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z
1V
1R 1N
1F
1B
1J
1871-1U-06B(01-02).fm 212 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–213
01-02
Diagnostic procedure
End Of Sie
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go
to the next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
Yes
Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
CLASSIFY APP SENSOR OR HARNESS
MALFUNCTION
• Connect the M-MDS.
• Access the APP2 PID.
• Disconnect the throttle body connector.
• Connect a jumper wire between APP sensor
terminals A and C (harness-side).
• Is the PID approx. 100%?
Yes
Go to the next step.
No
Go to step 5.
4
INSPECT APP SENSOR
• Perform the APP sensor inspection.
(See01-40-33 ACCELERATOR PEDAL
POSITION (APP) SENSOR INSPECTION[L3
WITH TC].)
• Is the APP sensor normal?
Yes
Inspect for poor APP sensor connector terminal A
connection. Repair or replace if necessary, then go to Step
8.
No
Replace the APP sensor, then go to Step 8.
5
INSPECT POWER SUPPLY CIRCUIT VOLTAGE
AT APP SENSOR CONNECTOR
• Turn ignition switch to the ON position (Engine
off).
• Measure the voltage at APP sensor terminal A
(harness-side).
• Is the voltage within 4.5— 5.5 V?
Yes
Go to the next step.
No
Repair or replace for an open circuit between APP sensor
connector terminal A and PCM connector terminal 1AJ
(harness-side).
Then, then go to Step 8.
6
VERIFY APP2 SIGNAL CIRCUIT FOR OPEN
CIRCUIT
• Turn the ignition switch to off.
• Inspect for continuity between APP sensor
terminal C (harness-side) and PCM terminal
1AC (harness-side).
• Inspect for continuity between APP sensor
terminal A (harness-side) and PCM terminal
1AT (harness-side).
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspected wiring harness, then go to
Step 8.
7
VERIFY APP2 SIGNAL CIRCUIT FOR SHORT
TO GROUND
• Inspect for continuity between APP sensor
terminal C (harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the suspected wiring harness, then go to
the next step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P2127
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 engine and warm it up completely.
• Is the same DTC present?
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.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the “After Repair Procedure”.
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
Troubleshooting completed.
1871-1U-06B(01-02).fm 213 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–214
DTC P2128[L3 WITH TC]
id010239812000
Diagnostic procedure
DTC P2128
Accelerator pedal position (APP) sensor No.2 circuit high input
DETECTION
CONDITION
• The PCM monitors the APP sensor No.2 signal. If the PCM detects that the APP sensor No.2 voltage is
above 4.5 V, the PCM determines that the APP sensor No.2 circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
POSSIBLE
CAUSE
• APP sensor malfunction
• Connector or terminal malfunction
• Open circuit between APP sensor terminal B and PCM terminal 1AV
• Short to power supply circuit between APP sensor terminal C and PCM terminal 1AC
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go
to the next step.
2
VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
Yes
Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT APP SENSOR CONNECTOR
• Turn the ignition switch to off.
• Verify that the APP sensor connector is
connected securely.
• Is the connector normal?
Yes
Go to the next step.
No
Connect the connector securely, then go to Step 10.
PCM
APP SENSOR
3
7
3
3
4
8
5
4
4
8
8
6
9
A
C
B
1AJ
1AC
1AV
D
E
APP SENSOR
WIRING HARNESS SIDE CONNECTOR
PCM
WIRING HARNESS SIDE CONNECTOR
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1E
1A
1I
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
1T
1P
1H
1D
1L
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1G
1C
1K
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z
1V
1R 1N
1F
1B
1J
9
1871-1U-06B(01-02).fm 214 ページ 2006年3月15日 水曜日 午前10時32分
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