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Mazda CX 7. Manual - part 24

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–51

01-02

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED

• Has the FREEZE FRAME DATA been

recorded?

Yes

Go to the next step.

Record FREEZE FRAME DATA on the repair order, then go
to the next step.

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.

Go to the next step.

INSPECT MAF SENSOR CONNECTOR FOR
POOR CONNECTION

• Turn the ignition switch off.

• Disconnect the MAF/IAT sensor connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace terminals, then go to Step 8.

Go to the next step.

INSPECT POWER SUPPLY CIRCUIT FOR OPEN
CIRCUIT

• Turn ignition switch to the ON position (Engine

off).

• Inspect voltage at MAF/IAT sensor terminal A

(harness-side).

• Is voltage B+?

Yes

Go to the next step.

Inspect for an open circuit in the wiring harness between
MAF/IAT sensor terminal A (harness-side) and the main
relay.
Repair or replace the wiring harness, then go to Step 8.

INSPECT PCM CONNECTOR FOR POOR
CONNECTION

• Turn the ignition switch off.

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair terminal, then go to Step 8.

Go to the next step.

INSPECT MAF SENSOR SIGNAL CIRCUIT FOR
OPEN CIRCUIT

• Remove the PCM with the PCM connector

connected.

• Inspect for continuity between MAF/IAT sensor

terminal C (harness-side) and PCM terminal
1AK (harness-side).

• Is there continuity?

Yes

Go to the next step.

Repair or the replace suspected wiring harness, then go to
Step 8.

INSPECT MAF SENSOR SIGNAL CIRCUIT FOR
SHORT CIRCUIT

• Inspect for continuity between the MAF/IAT

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.

Replace the MAF/IAT sensor, then go to the next step.

VERIFY TROUBLESHOOTING OF DTC P0102
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 PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

(See01-02-10 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].)

Troubleshooting completed.

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–52

DTC P0103[L3 WITH TC]

id010239803300

DTC P0103

MAF circuit high input

DETECTION

CONDITION

• The PCM monitors input voltage from the MAF sensor when the engine is running. If the input voltage is

above 4.9 V, the PCM determines that the MAF circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (CCM).

• MIL illuminates if 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

• MAF sensor malfunction

• Connector or terminal malfunction

• Short to power supply in the wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK

• Open circuit in the wiring harness between MAF/IAT sensor terminal B and PCM terminal 1P

MAIN RELAY

1AK

PCM

MAF SENSOR

1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M

1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X

1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O

1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z

1R 1N

PCM

HARNESS SIDE CONNECTOR

MAF/IAT SENSOR

HARNESS SIDE CONNECTOR

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–53

01-02

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED

• Has the FREEZE FRAME DATA been

recorded?

Yes

Go to the next step.

Record FREEZE FRAME DATA on the repair order, then go
to the next step.

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.

Go to the next step.

INSPECT MAF SENSOR CONNECTOR FOR
POOR CONNECTION

• Turn the ignition switch off.

• Disconnect the MAF/IAT sensor connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace terminals, then go to Step 7.

Go to the next step.

INSPECT MAF SIGNAL CIRCUIT FOR SHORT
TO POWER SUPPLY

• Turn ignition switch to the ON position (Engine

off).

• Measure voltage between MAF/IAT sensor

terminal C (harness-side) and body ground.

• Is voltage 0 V?

Yes

Go to the next step.

Repair or replace the suspected wiring harness, then go to
Step 7.

INSPECT PCM CONNECTOR FOR POOR
CONNECTION

• Turn the ignition switch off.

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair the terminal, then go to Step 7.

Go to the next step.

INSPECT MAF SENSOR GROUND CIRCUIT
FOR OPEN CIRCUIT

• Remove the PCM with the PCM connector

connected.

• Inspect for continuity between MAF/IAT sensor

terminal B (harness-side) and PCM terminal
1P.

• Is there continuity?

Yes

Go to the next step.

Repair or replace the suspected wiring harness, then go to
the next step.

VERIFY TROUBLESHOOTING OF DTC P0103
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 same DTC present?

Yes

Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

(See01-02-10 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].)

Troubleshooting completed.

1871-1U-06B(01-02).fm 53 ページ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–54

DTC P0107[L3 WITH TC]

id010239803400

DTC P0107

MAP sensor circuit low input

DETECTION

CONDITION

• PCM monitors input voltage from the MAP sensor when the intake air temperature is above –10 °C {14 °F}.

If the input voltage is below 0.10 V, the PCM determines that the MAP sensor 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

• MAP sensor malfunction

• Connector or terminal malfunction

• Short to ground in the wiring harness between MAP sensor terminal D and PCM terminal 2AG

• Open circuit in the wiring harness between MAP sensor terminal C and PCM terminal 2AU

• MAP sensor signal circuit and MAP sensor ground circuit are shorted to each other.

• PCM malfunction

2AU

2AG

2AV

PCM

HARNESS SIDE CONNECTOR

MAP SENSOR

HARNESS SIDE CONNECTOR

MAP SENSOR

5 6

2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M

2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P

2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O

2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z

2V 2R 2N

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