Mazda Protege 5. Manual - part 170

CONTROL SYSTEM [ZM]

01–40A–33

01–40A

Resistance Inspection

1. Disconnect the CKP sensor connector.
2. Measure the resistance between CKP sensor terminals A and B using an ohmmeter.

•

If not as specified, replace the CKP sensor.

•

If CKP sensor resistance is okay, but PID value or PCM terminal 21 and 22 voltage are out of specification, 
carry out the “Circuit Open/Short Inspection”.

Specification

Approx. 550 ohms

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
2. Connect the SST (104 Pin Breakout Box) to the 

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

4. Inspect for an open or short circuit in the following 

wiring harnesses by probing the applicable 
sensor and SST (104 Pin Breakout Box) terminals 
with ohmmeter leads.

•

If there is an open or short circuit, repair or 
replace wiring harnesses.

•

If there is no open or short circuit, replace the CKP sensor.

Open circuit

•

CKP signal (+) circuit (CKP sensor connector terminal A and PCM connector terminal 21)

•

CKP signal (–) circuit (CKP sensor connector terminal B and PCM connector terminal 22)

Short circuit

•

CKP signal (+) circuit (CKP sensor connector 
terminal A and PCM connector 21 to GND)

•

CKP signal (–) circuit (CKP sensor connector 
terminal B and PCM connector terminal 22)

5. Reconnect the CKP sensor connector.

End Of Sie

X3U140WBT

X3U140WBN

Y3U140WAF

1712-1U-01G(01-40A).fm  33 ページ  ２００１年６月２９日 金曜日 午前９時５０分

CONTROL SYSTEM [ZM]

01–40A–34

CRANKSHAFT POSITION (CKP) SENSOR ADJUSTMENT [ZM]

A3U014018230W04

1. Loosen the CKP sensor installation bolt.
2. While moving the CKP sensor, adjust the air gap 

between the CKP sensor and the plate teeth on 
the plate using a feeler gauge.

•

If not adjusted within specification, replace the 
plate behind the crankshaft pulley or CKP 
sensor. (See 01–40A–34 PLATE REMOVAL/
INSTALLATION [ZM].) (See 01–40A–34 
CRANKSHAFT POSITION (CKP) SENSOR 
REMOVAL/INSTALLATION [ZM].)

Specification

0.5—1.5 mm {0.020—0.059 in}

3. Tighten the CKP sensor installation bolt.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

End Of Sie

CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [ZM]

A3U014018230W05

Caution

••••

When foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output 
from the sensor because of flux turbulence and adversely affect the engine control. Be sure there 
is no foreign material on the CKP sensor when replacing.

1. Disconnect the CKP sensor connector.
2. Remove the undercover.
3. Remove the CKP sensor installation bolt.
4. Install in the reverse order of removal.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

5. Reconnect the CKP sensor connector.

Caution

••••

Do not forcefully pull the wiring harness 
of the CKP sensor, or harness will be 
damaged.

6. Adjust the air gap. (See 01–40A–34 

CRANKSHAFT POSITION (CKP) SENSOR ADJUSTMENT [ZM].)

End Of Sie

PLATE REMOVAL/INSTALLATION [ZM]

A3U014011408W01

1. Remove the crankshaft pulley. (See 01–10A–9 

TIMING BELT REMOVAL/INSTALLATION [ZM].)

2. Remove the plate.

Note

•

Adjust the drive belt when installing the drive 
belt. (See 01–10A–4 DRIVE BELT 
ADJUSTMENT [ZM].)

3. Install in the reverse order of removal.

End Of Sie

X3U140WAD

X3U140WAE

Y3U140WA4

1712-1U-01G(01-40A).fm  34 ページ  ２００１年６月２９日 金曜日 午前９時５０分

CONTROL SYSTEM [ZM]

01–40A–35

01–40A

CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [ZM]

A3U014018200W03

Caution

••••

When foreign material such as an iron chip is on the CMP sensor, it can cause abnormal output 
from the sensor because of flux turbulence and adversely affect the engine control. Be sure there 
is no foreign material on the CMP sensor when replacing.

1. Disconnect the negative battery cable.
2. Disconnect the CMP sensor connector.
3. Remove the CMP sensor installation bolt.
4. Remove the CMP sensor.
5. Make sure that the CMP sensor is free of any metallic shavings or particles.

•

If metallic shavings or particles are found on the sensor, clean them off.

6. Install in the reverse order of removal.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

End Of Sie

CAMSHAFT POSITION (CMP) SENSOR INSPECTION [ZM]

A3U014018200W04

Visual Inspection

1. Remove the CMP sensor. (See 01–40A–35 CAMSHAFT POSITION (CMP) SENSOR REMOVAL/

INSTALLATION [ZM].)

Note

•

Make sure that the CMP sensor is free of any metallic shavings or particles.

•

If metallic shavings or particles are found on the sensor, clean them off.

2. Install the CMP sensor. (See 01–40A–35 CAMSHAFT POSITION (CMP) SENSOR REMOVAL/

INSTALLATION [ZM].)

Wave profile Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
2. Connect the SST (104 Pin Breakout Box) to the 

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

4. Connect the oscilloscope testleads to the 

following PCM connector terminals.

•

(+) lead: PCM terminal 85

•

(-) lead: PCM terminal 103

5. Start the engine.
6. Monitor RPM PID.
7. Inspect wave profile at idle.

•

If wave profile or voltage are out of 
specifications, carry out the “Circuit Open/
Short Inspection”.
— PCM terminal: 85(+) 

⇔

 103(-)

— Oscilloscope setting: 2 V/DIV(Y),  20 ms/

DIV(X), DC range

— Vehicle condition: Idle after warm up

X3U140WBN

Z3U0140W018

1712-1U-01G(01-40A).fm  35 ページ  ２００１年６月２９日 金曜日 午前９時５０分

CONTROL SYSTEM [ZM]

01–40A–36

Circuit Open/Short Inspection

1. Remove the PCM. (See 01–40A–7 PCM REMOVAL/INSTALLATION [ZM].)
2. Connect the SST (104 Pin Breakout Box) to the 

PCM as shown.

3. Tighten the connector attaching screw.

Tightening torque

7.9—10.7 N·m 

{80—110 kgf·cm, 69.5—95.4 in·lbf}

4. Inspect for an open or short circuit in the following 

wiring harnesses by probing the applicable 
sensor and SST (104 Pin Breakout Box) terminals 
with ohmmeter leads.

•

If there is an open or short circuit, repair or 
replace wiring harnesses.

•

If there is no open or short circuit, replace the CMP sensor.

Open circuit

•

CMP signal circuit (CMP sensor connector terminal B and PCM connector terminal 85)

•

Power circuit (CMP sensor connector terminal A and main relay terminal D through common connector)

•

GND circuit (CMP sensor connector terminal C and PCM connector terminal 103)

Short circuit

•

CMP signal circuit (CMP sensor connector 
terminal B and PCM connector terminal 85 to 
GND)

•

Power circuit (CMP sensor connector terminal 
A and main relay terminal D through common 
connector to GND)

5. Reconnect the CMP sensor connector.
6. Inspect the camshaft pulley (exhaust side) for 

damage and cracks.

End Of Sie

HEATED OXYGEN SENSOR (HO2S) INSPECTION [ZM]

A3U014018861W02

HO2S (Front and Rear) Voltage Inspection

Note

•

Perform the following test only when directed.

1. Warm up the engine and run it at idle.
2. Disconnect the HO2S (Front or Rear) connector.
3. Connect the voltmeter test leads to the following 

HO2S terminals:

•

(+) lead—HO2S terminal A

•

(–) lead—HO2S terminal B

4. Run the engine at 3,000 rpm until the voltmeter 

indicates approx. 0—1.0 V.

5. Verify that the voltmeter needle moves when the 

engine speed increases and decreases suddenly 
several times.

•

If not as specified, replace the HO2S.

•

If the HO2S is okay, but PID value or PCM 
terminal 60 (Front), 35 (Rear) voltage is out of 
specification, carry out the “Circuit Open/
Short Inspection”.

Specification

X3U140WBN

X3U140WAT

Engine speed

Voltage (V)

Increase

0.5—1.0

Decrease

0—0.5

Z3U0140W023

1712-1U-01G(01-40A).fm  36 ページ  ２００１年６月２９日 金曜日 午前９時５０分