Mazda Protege 5. Manual - part 18

 

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Mazda Protege 5. Manual - part 18

 

 

ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)]

01–02A–38

End Of Sie

7

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION 

Turn ignition key to OFF.

Disconnect PCM connector.

Inspect PCM terminal 39 and 91 (harness-side) 
for tightness using feeler tool.

Is there malfunction?

Yes Repair or replace terminal, then go to Step 10.

No

Go to next step.

8

INSPECT IAT SENSOR SIGNAL CIRCUIT FOR 
OPEN CIRCUIT

Connect breakout box with PCM disconnected.

Check for continuity between MAF/IAT sensor 
terminal D (harness-side) and breakout box 
terminal 39.

Is there continuity?

Yes Go to next step.

No

Repair or replace harness for open, then go to Step 10.

9

INSPECT IAT SENSOR GROUND CIRCUIT FOR 
OPEN CIRCUIT

Check for continuity between MAF/IAT sensor 
terminal E (harness-side) and breakout box 
terminal 91.

Is there continuity?

Yes Go to next step.

No

Repair or replace harness for open, then go to next step.

10

VERIFY TROUBLESHOOTING OF DTC P0113 
COMPLETED

Make sure to reconnect all disconnected 
connectors.

Clear DTC from PCM memory using WDS or 
equivalent.

Start engine.

Is same DTC present?

Yes Replace PCM, then go to next step.

No

No concern is detected. Go to next step.

11

VERIFY AFTER REPAIR PROCEDURE

Perform “After Repair Procedure”.
(See 01–02A–10 AFTER REPAIR 
PROCEDURE [ZM].)

Is there any DTC present?

Yes Go to applicable DTC inspection.

(See 01–02A–15 DTC TABLE [ZM].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

1712-1U-01G(01-02A).fm  38 ページ  2001年6月29日 金曜日 午後2時20分

ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)]

01–02A–39

01–02A

DTC P0117 [ZM]

A3U010201084W41

Diagnostic procedure

DTC P0117

ECT circuit low input

DETECTION 

CONDITION

PCM monitors ECT sensor signal at PCM terminal 38. If voltage at terminal 38 is below 0.20 V, PCM 
determines that ECT sensor circuit has malfunction.

Diagnostic support note

This is a continuous monitor (CCM).

MIL illuminates if PCM detects the above malfunction condition during first drive cycle. Therefore, 
PENDING CODE is not available.

FREEZE FRAME DATA is available.

DTC is stored in PCM memory.

POSSIBLE 

CAUSE

ECT sensor malfunction

Short to ground circuit between ECT sensor terminal A and PCM connector terminal 38

ECT signal and ground circuits are shorted each other.

PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN 
RECORDED

Has FREEZE FRAME DATA been recorded?

Yes Go to next step.

No

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

2

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

Check for related Service Bulletins availability.

Is any related repair information available?

Yes Perform repair or diagnosis according to available repair 

information.

If vehicle is not repaired, go to next step.

No

Go to next step.

3

INSPECT TERMINAL FOR BENDING

Turn ignition key to OFF.

Disconnect ECT sensor connector.

Check for bent of ECT sensor terminals A and 
B (part-side).

Is there malfunction?

Yes Repair or replace terminal, then go to Step 7.

No

Go to next step.

4

CLASSIFY ECT SENSOR MALFUNCTION OR 
HARNESS MALFUNCTION

Measure resistance between ECT sensor 
teminals A and B (part-side).

Is resistance within 0.111—25.403 kilohms

Yes Go to next step.

No

Replace ECT sensor, then go to Step 7.

1712-1U-01G(01-02A).fm  39 ページ  2001年6月29日 金曜日 午後2時20分

ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)]

01–02A–40

End Of Sie

5

INSPECT ECT SIGNAL CIRCUIT FOR SHORT 
TO GROUND

Turn ignition key to OFF.

Disconnect PCM connector.

Check for continuity between ECT sensor 
terminal A (harness-side) and body ground.

Is there continuity?

Yes Repair or replace harness for short to ground, then go to 

Step 7.

No

Go to next step.

6

INSPECT ECT CIRCUIT FOR SHORT

Check for continuity between ECT sensor 
terminals A and B (harness-side).

Is there continuity?

Yes Repair or replace harness for short, then go to next step.

No

Go to next step.

7

VERIFY TROUBLESHOOTING OF DTC P0117 
COMPLETED

Make sure to reconnect all disconnected 
connectors.

Clear DTC from PCM memory using WDS or 
equivalent.

Start engine.

Is same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

8

VERIFY AFTER REPAIR PROCEDURE

Perform “After Repair Procedure”.
(See 01–02A–10 AFTER REPAIR 
PROCEDURE [ZM].)

Is there any DTC present?

Yes Go to applicable DTC inspection.

(See 01–02A–15 DTC TABLE [ZM].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

1712-1U-01G(01-02A).fm  40 ページ  2001年6月29日 金曜日 午後2時20分

ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (ZM)]

01–02A–41

01–02A

DTC P0118 [ZM]

A3U010201084W42

Diagnostic procedure

DTC P0118

ECT circuit high input

DETECTION 

CONDITION

PCM monitors ECT sensor signal at PCM terminal 38. If voltage at terminal 38 is above 4.94 V, PCM 
determines that ECT sensor circuit has malfunction.

Diagnostic support note

This is a continuous monitor (CCM).

MIL illuminates if PCM detects the above malfunction condition during first drive cycle. Therefore, 
PENDING CODE is not available.

FREEZE FRAME DATA is available.

DTC is stored in PCM memory.

POSSIBLE 

CAUSE

ECT sensor malfunction

Open circuit between ECT sensor terminal A and PCM terminal 38

Short to power circuit between ECT sensor terminal A and PCM terminal 38

Open circuit between ECT sensor terminal B and PCM terminal 91

Poor connection of ECT sensor or PCM connectors

PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN 
RECORDED

Has FREEZE FRAME DATA been recorded?

Yes Go to next step.

No

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

2

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

Check for related Service Bulletins availability.

Is any related repair information available?

Yes Perform repair or diagnosis according to available repair 

information.

If vehicle is not repaired, go to next step.

No

Go to next step.

3

INSPECT ECT SENSOR CONNECTOR FOR 
POOR CONNECTION 

Turn ignition key to OFF.

Disconnect ECT sensor connector.

Check for poor connection (damaged/pulled-
out pins, corrosion, etc.).

Is there malfunction?

Yes Repair or replace terminal, then go to Step 10.

No

Go to next step.

1712-1U-01G(01-02A).fm  41 ページ  2001年6月29日 金曜日 午後2時20分

 

 

 

 

 

 

 

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