Mazda Protege 5. Manual - part 33

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

01–02A–98

Diagnostic procedure

End Of Sie

POSSIBLE 

CAUSE

•

IAC valve malfunction

•

Accelerator cable misadjustment

•

Actuator cable misadjustment

•

Throttle valve malfunction

•

Vacuum hose misconnection

•

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

VERIFY RELATED PENDING OR STORED 
DTCS

•

Turn ignition key to OFF, then start engine.

•

Verify pending code or stored DTCs using 
WDS or equivalent.

•

Are other DTCs present?

Yes Repair applicable DTCs.

(See 01–02A–15 DTC TABLE [ZM].)

No

Go to next step.

4

INSPECT IAC VALVE MALFUNCTION

•

Perform IAC inspection.
(See 01–13A–7 IDLE AIR CONTROL (IAC) 
VALVE INSPECTION [ZM].)

•

Is IAC valve okay?

Yes Go to next step.

No

Replace IAC valve, then go to Step 9.

5

INSPECT ACCELERATOR CABLE FREE PLAY

•

Turn ignition key to OFF.

•

Is accelerator cable free play okay?
(See 01–13A–13 ACCELERATOR CABLE 
INSPECTION/ADJUSTMENT [ZM].)

Yes Go to next step.

No

Adjust accelerator cable free play, then go to Step 9.
(See 01–13A–13 ACCELERATOR CABLE INSPECTION/
ADJUSTMENT [ZM].)

6

INSPECT ACTUATOR CABLE FREE PLAY

•

Is actuator cable adjustment okay?

Yes Go to next step.

No

Adjust actuator cable free play, then go to Step 9.

7

INSPECT VACUUM HOSE CONNECTION

•

Are vacuum hoses connected accurately?
(See 01–13A–3 VACUUM HOSE ROUTING 
DIAGRAM [ZM].)

Yes Go to next step.

No

Reconnect vacuum hose accurately, then go to Step 9.

8

VISUAL INSPECT THROTTLE VALVE

•

Remove throttle body.

•

Is throttle valve fully closed?

Yes Go to next step.

No

Clean or replace throttle body, then go to next step.

9

VERIFY TROUBLESHOOTING OF DTC P0507 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Start engine.

•

Clear DTC from PCM memory using WDS or 
equivalent.

•

Depress brake pedal for 14.1 seconds or 
more.

•

Is PENDING CODE of same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

10

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.

DTC P0507

Idle control system RPM higher than expected

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

01–02A–99

01–02A

DTC P0550 [ZM]

A3U010201087W09

Diagnostic procedure

DTC P0550

PSP switch circuit malfunction

DETECTION 

CONDITION

•

PCM monitors PSP switch signal at PCM terminal 31. If input voltage is low (switch stays on) for 1 minute 
when the VSS is above 60.1 km/h {37.3 mph} and ECT is above 60

°°°°

C {140

°°°°

F}, PCM determines that 

PSP switch circuit has malfunction.

Diagnostic support note

•

This is a continuous monitor (CCM).

•

MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.

•

PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.

•

FREEZE FRAME DATA is available.

•

DTC is stored in PCM memory.

POSSIBLE 

CAUSE

•

PSP switch malfunction

•

Short to ground between PSP switch terminal and PCM terminal 31

•

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 PSP SWITCH

•

Perform PSP switch inspection
(See 01–40A–43 POWER STEERING 
PRESSURE (PSP) SWITCH INSPECTION 
[ZM].)

•

Is PSP switch okay?

Yes Go to next step.

No

Replace the PSP switch, then go to Step 5.

4

INSPECT PSP SWITCH SIGNAL CIRCUIT FOR 
SHORT TO GROUND

•

Disconnect PCM connector.

•

Check for continuity between PSP switch 
terminal (harness-side) and body ground.

•

Is there continuity?

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

next step.

No

Go to next step.

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

01–02A–100

End Of Sie

DTC P0703 [ZM]

A3U010201089W04

5

VERIFY TROUBLESHOOTING OF DTC P0550 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Start engine.

•

Clear DTC from PCM memory using WDS or 
equivalent.

•

Drive vehicle above 60.1 km/h {37.3 mph} for 
1 minute.

•

Verify that ECT PID is above 60

°°°°

C {140

°°°°

F} 

using WDS or equivalent.

•

Is PENDING CODE of same DTC present?

Yes Replace PCM, then go to next step.

No

No concern is detected. Go to next step.

6

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

DTC P0703

Brake switch input malfunction

DETECTION 

CONDITION

•

PCM monitors changes in input voltage from brake switch. If PCM does not detect PCM terminal 92 
voltage changes while accelerating and decelerating 10 times repeatedly, it determines that brake switch 
circuit has malfunction.

Diagnostic support note

•

This is a continuous monitor (CCM).

•

MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.

•

PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.

•

FREEZE FRAME DATA is available.

•

DTC is stored in PCM memory.

POSSIBLE 

CAUSE

•

Brake switch malfunction

•

Open harness between brake switch terminal B and PCM connector terminal 92

•

PCM malfunction

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

01–02A–101

01–02A

Diagnostic procedure

End Of Sie

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 BRAKE SWITCH SIGNAL CIRCUIT 
FOR SHORT TO POWER

•

Measure voltage between brake switch 
connector terminal B and body ground.

•

Is voltage B+?

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

Step 9.

No

Go to Next step.

4

INSPECT BRAKE SWITCH CONNECTOR FOR 
POOR CONNECTION

•

Turn ignition switch to OFF.

•

Disconnect brake switch connector.

•

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

•

Is there malfunction?

Yes Repair or replace terminal, then go to Step 9.

No

Go to next step.

5

INSPECT BRAKE SWITCH POWER CIRCUIT 
FOR OPEN CIRCUIT

•

Measure voltage between brake switch 
connector terminal A and body ground.

•

Is voltage B+?

Yes Go to next step.

No

Repair or replace brake switch power circuit for open, then 
Go to Step 9.

6

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

•

Turn ignition switch to OFF.

•

Disconnect PCM connector.

•

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

•

Is there any malfunction?

Yes Repair terminal, then go to Step 9.

No

Go to next step.

7

INSPECT BRAKE SWITCH SIGNAL CIRCUIT 
FOR OPEN CURCUIT

•

Connect breakout box with PCM connector 
disconnected.

•

Connect brake switch connector.

•

Turn ignition switch to ON (engine OFF).

•

Depress brake pedal and measure voltage 
between breakout box terminal 92 and body 
ground.

•

Is voltage B+?

Yes Go to next step.

No

Repair or replace harness for open, then go to Step 9.

8

INSPECT BRAKE SWITCH

•

Perform brake switch inspection.
(See 04–11–5 BRAKE SWITCH 
INSPECTION.)

•

Is brake switch okay?

Yes Go to next step.

No

Replace brake switch, then go to next step.

9

VERIFY TROUBLESHOOTING OF DTC P0703 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Clear DTC from memory using WDS or 
equivalent.

•

Drive vehicle 30 km/h {18.6 mph} or more.

•

Depress and release brake pedal more than 
10 times while driving vehicle.

•

Is PENDING CODE of same DTC present?

Yes Replace PCM, then go to next step.

No

No concern is detected. Go to next step.

10

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.

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