Engine Controls - Control System: Diagnosis Mazda RX-8 I рестайлинг

Inspection Using An Oscilloscope (Reference)

Note. The duty ratio for the wave pattern can vary with the control conditions. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.

Throttle control (+)

Scheme 5

1. Terminal connected: 2A (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 0.4 ms/DIV (X), DC range
3. Measurement condition: IG SW ON

Throttle control (-)

Scheme 6

1. Terminal connected: 2B (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 1 ms/DIV (X), DC range
3. Measurement condition: As soon as the accelerator pedal is fully released from the fully depressed position while the ignition switch is at ON (engine off.)

Purge control

Scheme 7

1. Terminal connected: 2C (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 20 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

Note. Purge control might not be activated depending on the engine conditions.

APV motor control (+)

Scheme 8

1. Terminal connected: 2D (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 20 ms/DIV (X), DC range
3. Measurement condition: High engine speed after warm-up

OCV control

Scheme 9

1. Terminal connected: 2E (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 2 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

APV motor control (-)

1. Terminal connected: 2F (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 20 ms/DIV (X), DC range
3. Measurement condition: High engine speed after warm-up

Eccentric shaft position sensor

Scheme 10

1. Terminal connected: 2AG (+)-Negative battery terminal
2. Oscilloscope setting: 2 V/DIV (Y): 5 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

Field coil control (Generator)

Scheme 11

1. Terminal connected: 2AI (+)-Negative battery terminal
2. Oscilloscope setting: 0.5 V/DIV (Y): 1 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

Generator output voltage

Scheme 12

1. Terminal connected: 2AJ (+)-Negative battery terminal
2. Oscilloscope setting: 2 V/DIV (Y): 2 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

Ignition coil (L/F, L/R, T/F, T/R)

Scheme 13

1. Terminal connected
2. Oscilloscope setting: 2 V/DIV (Y): 10 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

Fuel injector (FS, RS) control

Scheme 14

1. Terminal connected
2. Oscilloscope setting: 5 V/DIV (Y): 5 ms/DIV (X), DC range
3. Measurement condition: Racing after warm-up (no load)

Fuel injector (FP, RP) control

Scheme 15

1. Terminal connected
2. Oscilloscope setting: 5 V/DIV (Y): 10 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)
4. Terminal connected
5. Oscilloscope setting: 5 V/DIV (Y): 10 ms/DIV (X), DC range
6. Measurement condition: Cranking while the engine is cold. (ECT: Approx. 20 °C {68 °F})

Scheme 16

HO2S heater control

Scheme 17

1. Terminal connected: 2BE (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 100 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

A/F sensor heater control

Scheme 18

1. Terminal connected: 2BG (+)-Negative battery terminal
2. Oscilloscope setting: 5 V/DIV (Y): 50 ms/DIV (X), DC range
3. Measurement condition: Idling after warm-up (no load)

NEUTRAL SWITCH INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

Continuity Inspection

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Remove the neutral switch. (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [P66M-D]»(ref-367635-S07284987052010072700000) .)
4. Verify that the continuity between neutral switch terminals A and B is as indicated in the table.

1. If there is no malfunction, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S33897605302010072700000) .)
2. If there is any malfunction, replace the neutral switch. (See «NEUTRAL SWITCH REMOVAL/INSTALLATION [P66M-D]»(ref-367635-S07284987052010072700000) .)

Scheme 19

CONTINUITY REFERENCE CHART

Circuit Open/Short Inspection

1. Disconnect the PCM connector.
2. Disconnect the neutral switch connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 20

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. Neutral switch terminal A and PCM terminal 2AS
2. Neutral switch terminal B and body ground

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. Neutral switch terminal A and body ground
2. Neutral switch terminal A and power supply

CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Disconnect the CPP switch connector.
4. Verify that the continuity between CPP switch terminals B and D is as indicated in the table.

1. If there is no malfunction, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S06457599312010072700000) .)
2. If there is any malfunction, replace the CPP switch. (See «CLUTCH PEDAL REMOVAL/INSTALLATION»(ref-367634-S08403216082010072700000) .)

Scheme 21

CONTINUITY REFERENCE CHART

1. Disconnect the PCM connector.
2. Disconnect the CPP switch connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 22

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. CPP switch terminal B and PCM terminal 1D
2. CPP switch terminal D and body ground

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. CPP switch terminal B and body ground
2. CPP switch terminal B and power supply

AUXILIARY PORT VALVE (APV) POSITION SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

Visual Inspection

1. Remove the APV position sensor. (See «AUXILIARY PORT VALVE (APV) POSITION SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S41371173102010072700000) .)
2. Verify that there are no metal shavings on the sensor.
3. Repair or replace the malfunctioning part according to the inspection results.

Resistance Inspection

1. Disconnect the APV position sensor connector.
2. Measure the coil resistance between APV position sensor terminals A and B or B and C.

1. If not within the specification, replace the APV position sensor. (See «AUXILIARY PORT VALVE (APV) POSITION SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S41371173102010072700000) .)

APV position sensor No. 1, No. 2 resistance Except for infinity or 0 ohms [at room temperature]

Scheme 23

SECONDARY SHUTTER VALVE (SSV) SWITCH INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Verify that the continuity between SSV switch terminals A and B is as indicated in the table.

1. If there is no malfunction, perform the "Circuit Open/Short Inspection".
2. If there is any malfunction, replace the SSV switch. (See «SECONDARY SHUTTER VALVE (SSV) SWITCH REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S40581154862010072700000) .)

Scheme 24

CONTINUITY REFERENCE CHART

1. Disconnect the PCM connector.
2. Disconnect the SSV switch connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 25

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. SSV switch terminal A and PCM terminal 2AE
2. SSV switch terminal B and body ground

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. SSV switch terminal A and body ground
2. SSV switch terminal A and power supply

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Remove the generator. (See «GENERATOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S18684067582010072700000) )
4. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [13B-MSP]»(ref-367619-S09402478192010072700000) )
5. Disconnect the ECT sensor connector.
6. Remove the ECT sensor. (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S08787929992010072700000) .)
7. Place the detection part of the ECT sensor in water and verify that the resistance between ECT sensor terminals A and B is as indicated in the table while gradually increasing water temperature.

1. If the monitor item condition/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S15466659542010072700000) .)
2. If not within the specification, replace the ECT sensor. (See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S08787929992010072700000) .)

ECT sensor resistance

ECT SENSOR RESISTANCE SPECIFICATION

1. Disconnect the PCM connector.
2. Disconnect the ECT sensor connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 26

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. ECT sensor terminal A and PCM terminal 2AH
2. ECT sensor terminal B and PCM terminal 2AY

Short circuit

1. If there is continuity at the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. ECT sensor terminal A and body ground
2. ECT sensor terminal A and power supply

MASS AIR FLOW (MAF) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Visually inspect the MAF/IAT sensor for the following

1. Damage, cracks
2. Rusted sensor terminal
3. Bent sensor terminal

1. If there is any malfunction, replace the MAF/IAT sensor. (See «MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S04854187422010072700000) .)
2. If the monitor item condition (reference) is not within the specification even though there is no malfunction, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S39249632952010072700000) .)

Voltage Inspection

1. Remove the MAF/IAT sensor without disconnect the MAF/IAT sensor connector.
2. Turn the ignition switch to ON position.
3. As the air gradually approaches the MAF detection part of the MAF/IAT sensor, verify that the voltage at PCM terminal 1AK (M-MDS PID: MAF) varies.

1. If it cannot be verified even though the related harnesses have no malfunction, replace the MAF/IAT sensor. (See «MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S04854187422010072700000) .)

1. Disconnect the PCM connector.
2. Disconnect the MAF/IAT sensor connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 27

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. MAF/IAT sensor terminal A and main relay terminal C
2. MAF/IAT sensor terminal B and PCM terminal 1L
3. MAF/IAT sensor terminal C and PCM terminal 1 AK

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. MAF/IAT sensor terminal A and body ground
2. MAF/IAT sensor terminal C and power supply
3. MAF/IAT sensor terminal C and body ground

INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Disconnect the MAF/IAT sensor connector.
4. Verify that the resistance between MAF sensor terminals D and E is as indicated in the table while blowing hot air gradually into the IAT sensor part built into the MAF sensor.

1. If the monitor item condition/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S25095342372010072700000) .)
2. If not within the specification, replace the MAF/IAT sensor. (See «MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S04854187422010072700000) .)

Scheme 28

IAT sensor resistance

IAT SENSOR RESISTANCE SPECIFICATIONS

IAT sensor characteristics graph (reference)

Scheme 29

1. Disconnect the PCM connectors.
2. Disconnect the MAF/IAT sensor connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 30

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness. MAF/IAT sensor terminal D and PCM terminal 1 AT MAF/IAT sensor terminal E and PCM terminal 1AR

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness. MAF/IAT sensor terminal D and body ground MAF/IAT sensor terminal D and power supply

BAROMETRIC PRESSURE (BARO) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position.
3. Select BARO on the M-MDS.
4. Verify that the BARO PID voltage is within the specification.

1. If not as verified, replace the PCM. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) .)

BARO Sensor Output Voltage 2.44-3.80 V

THROTTLE POSITION (TP) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Turn the ignition switch to the ON position.
2. Verify that the voltage at PCM terminals 2AK (M-MDS PID: TP1) and 2AL (M-MDS PID: TP2) increases while gradually increasing the accelerator pedal opening angle according to the accelerator pedal opening angle. If it can be verified, go to the next step. If it cannot be verified even though the related wiring harnesses have no malfunction, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) .)
3. Verify that the voltage at PCM terminals 2AK (M-MDS PID: TP1) and 2AL (M-MDS PID: TP2) is as indicated in the table.

1. If it cannot be verified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) .)

TP sensor output voltage

TP SENSOR OUTPUT VOLTAGE SPECIFICATIONS

1. Disconnect the PCM connector.
2. Disconnect the throttle body connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 31

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. Throttle body terminal C and PCM terminal 2P
2. Throttle body terminal D and PCM terminal 2AL
3. Throttle body terminal E and PCM terminal 2AO
4. Throttle body terminal F and PCM terminal 2AK

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. Throttle body terminal E and body ground
2. Throttle body terminal E and power supply
3. Throttle body terminal F and body ground
4. Throttle body terminal F and power supply
5. Throttle body terminal D and body ground
6. Throttle body terminal D and power supply

ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Turn the ignition switch to the ON position.
2. Verify that the voltage at PCM terminals 1AO (M-MDS PID: APP1) and 1AP (M-MDS PID: APP2) increases while gradually increasing the accelerator pedal opening angle according to the accelerator pedal opening angle. If it can be verified, go to the next step. If it cannot be verified even though the related wiring harnesses have no malfunction, replace the accelerator pedal. (See «ACCELERATOR PEDAL REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S21865367152010072700000) .)
3. Verify that the voltage at PCM terminals 1AO (M-MDS PID: APP1) and 1 AP (M-MDS PID: APP2) is as indicated in the table.

1. If it cannot be verified, replace the accelerator pedal. (See «ACCELERATOR PEDAL REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S21865367152010072700000) .)

APP sensor output voltage

APP SENSOR OUTPUT VOLTAGE SPECIFICATIONS

1. Disconnect the PCM connectors.
2. Disconnect the APP sensor connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 32

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. APP sensor terminal A and PCM terminal 1AJ
2. APP sensor terminal B and PCM terminal 1AV
3. APP sensor terminal C and PCM terminal 1AP
4. APP sensor terminal D and PCM terminal 1AL
5. APP sensor terminal E and PCM terminal 1AS
6. APP sensor terminal F and PCM terminal 1AO

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. APP sensor terminal D and body ground
2. APP sensor terminal D and power supply
3. APP sensor terminal A and body ground
4. APP sensor terminal A and power supply
5. APP sensor terminal F and body ground
6. APP sensor terminal F and power supply
7. APP sensor terminal C and body ground
8. APP sensor terminal C and power supply

A/F Sensor Current Inspection

1. Warm up the engine to normal operating temperature.
2. Using the M-MDS, monitor the following: Vehicle speed (PID: VSS) Engine speed (PID: RPM) A/F sensor current (PID: O2S11)
3. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 RPM or more.
4. Verify that the A/F sensor current (PID: O2S11) is 0.25 mA or more while decelerating as shown in the figure.

Scheme 33

1. If not within the specification, inspect the A/F sensor for an open or short circuit. (See «A/F SENSOR CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S21304755872010072700000) .) Then if there is no malfunction in the wiring harness, replace the A/F sensor. (See «AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S13015153162010072700000) .)

Scheme 34

1. Disconnect the PCM connector.
2. Disconnect the A/F sensor connector.
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

Open circuit

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

1. A/F sensor terminal A and PCM terminal 2AD
2. A/F sensor terminal B and PCM terminal 2Z

Short circuit

1. If there is continuity, there is a short circuit. Repair or replace the wiring harness.

1. A/F sensor terminal A and body ground
2. A/F sensor terminal A and power supply
3. A/F sensor terminal B and body ground
4. A/F sensor terminal B and power supply

A/F Sensor Heater Resistance Inspection

1. Disconnect the A/F sensor connector.
2. Measure the resistance between A/F sensor terminals C and D.

1. If not within the specification, replace the A/F sensor. (See «AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S13015153162010072700000) .)

A/F sensor heater resistance 1-10 ohms

Scheme 35

Scheme 36

1. Disconnect the PCM connector.
2. Disconnect the A/F sensor connector.
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

Open circuit

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

1. A/F sensor terminal C and main relay terminal C
2. A/F sensor terminal D and PCM terminal 2BG

Short circuit

1. If there is no continuity, there is a short circuit. Repair or replace the wiring harness.

1. A/F sensor terminal C and body ground
2. A/F sensor terminal D and power supply
3. A/F sensor terminal D and body ground

HO2S Voltage Inspection

1. Warm up the engine to normal operating temperature.
2. Using the M-MDS, monitor the following: Vehicle speed (PID: VSS) Engine speed (PID: RPM) HO2S voltage (PID: O2S12)
3. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 RPM or more.
4. Verify that the HO2S outputs a voltage of 0.6 V or more , one time or more, then verify that the HO2S voltage (PID: O2S12) is 0.3 V or less while decelerating as shown in the figure.

Scheme 37

1. If not within the specification, inspect the HO2S for an open or short circuit. (See «HO2S CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S14012687462010072700000) .) Then if there is no malfunction in the wiring harness, replace the HO2S. (See «HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S19417534502010072700000) .)

Scheme 38

1. Disconnect the PCM connector.
2. Disconnect the HO2S connector.
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

Open circuit

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

1. HO2S terminal A and PCM terminal 2Q
2. HO2S terminal B and PCM terminal 2BH

Short circuit

1. If there is continuity, there is a short circuit. Repair or replace the wiring harness.

1. HO2S terminal A and body ground
2. HO2S terminal A and power supply
3. HO2S terminal B and power supply

HO2S Heater Resistance Inspection

1. Disconnect the HO2S connector.
2. Measure the HO2S resistance between terminals C and D.

1. If not within the specification, replace the HO2S. (See «HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S19417534502010072700000) .)

HO2S heater resistance 2-50 ohms

Scheme 39

HO2S Circuit Open/Short Inspection (Heater)

1. Disconnect the PCM connector.
2. Disconnect the HO2S connector.
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)

Open circuit

1. If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

1. HO2S terminal C and main relay terminal C
2. HO2S terminal D and PCM terminal 2BE

Short circuit

1. If there is no continuity, there is a short circuit. Repair or replace the wiring harness.

1. HO2S terminal C and body ground
2. HO2S terminal D and power supply
3. HO2S terminal D and body ground

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Disconnect the KS connector.
4. Measure the resistance between KS terminals A and B.

1. If not within the specification, replace the KS. (See «KNOCK SENSOR (KS) REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S22901745612010072700000) .)
2. If the monitor item condition/specification (reference) is not within the specification, even though the KS resistance is within the specification, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S24976798702010072700000) .)

KS No. 1, No. 2 resistance 120-280 kilohms

1. Disconnect the PCM connector.
2. Disconnect the KS connector.
3. Inspect the following wiring harnesses for open or short. (Continuity inspection)

Scheme 40

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. KS No. 1 terminal A and PCM terminal 2U
2. KS No. 1 terminal B and PCM terminal 2V
3. KS No. 2 terminal A and PCM terminal 2AC
4. KS No. 2 terminal B and PCM terminal 2Y

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. KS No. 1 terminal A and body ground
2. KS No. 1 terminal A and power supply
3. KS No. 1 terminal B and body ground
4. KS No. 1 terminal B and power supply
5. KS No. 2 terminal A and body ground
6. KS No. 2 terminal A and power supply
7. KS No. 2 terminal B and body ground
8. KS No. 2 terminal B and power supply

ECCENTRIC SHAFT POSITION SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Remove the eccentric shaft position sensor.
2. Verify that there are no metal shavings on the sensor.

1. If the monitor item condition (reference) is not within the specification even though there is no malfunction, perform the "Circuit Open/Short Inspection". (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S22518991512010072700000) .)

1. Disconnect the eccentric shaft position sensor connector.
2. Measure the coil resistance between eccentric shaft position sensor terminals A and B.

1. If not within the specification, replace the eccentric shaft position sensor. (See «ECCENTRIC SHAFT POSITION SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S29919958202010072700000) .)
2. If the monitor item condition/specification (reference) is not within the specification, even though the eccentric shaft position sensor resistance is within the specification, perform the "Circuit Open/Short Inspection" and repair or replace the malfunctioning part. (See «CIRCUIT OPEN/SHORT INSPECTION»(ref-367617-S22518991512010072700000) .)

Eccentric shaft position sensor resistance 950-1,250 ohms [at room temperature]

1. Disconnect the PCM connector.
2. Disconnect the eccentric shaft position sensor connector.
3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Scheme 41

Open circuit

1. If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

1. Eccentric shaft position sensor terminal A and PCM terminal 2AG
2. Eccentric shaft position sensor terminal B and PCM terminal 2AP

Short circuit

1. If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

1. Eccentric shaft position sensor terminal A and body ground
2. Eccentric shaft position sensor terminal A and power supply
3. Eccentric shaft position sensor terminal B and body ground
4. Eccentric shaft position sensor terminal B and power supply

ECCENTRIC SHAFT POSITION PLATE INSPECTION [13B-MSP]

1. Verify that there are no cracks, damage, or corrosion on the projecting parts of the eccentric shaft position plate.

1. If there are cracks, damage, or corrosion on the projecting parts, replace the eccentric shaft position plate. (See «ECCENTRIC SHAFT POSITION PLATE REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S07177866682010072700000) .)

Scheme 42

PCM TEMPERATURE SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position.
3. Select PCM_T on the M-MDS.
4. Verify that the PCM_T PID voltage is within the specification.

1. If not as verified, replace the PCM. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) .)

PCM Temperature Sensor Output Voltage 1.2-2.6 V

Scheme 43

OIL PRESSURE SENSOR INSPECTION [13B-MSP]

Note. Before performing the following inspection, make sure to follow the troubleshooting flowchart. (See FOREWORD [13B-MSP] .)

1. Turn the ignition switch to ON position.
2. Verify that the voltage at PCM terminals 2R is within the specification.

1. If not as verified, replace the oil pressure sensor. (See «OIL PRESSURE SENSOR REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S26296152312010072700000) .)

Oil Pressure Sensor Output Voltage 0.55-1.03 V [Oil Pressure: 50-150 kPa {0.51-1.52 kgf/cm 2 , 7.3-21.7 psi}]

METERING OIL PUMP DRIVER INSPECTION [13B-MSP]

1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [13B-MSP]»(ref-367630-S30865077932010072700000) .)
2. Disconnect the negative battery cable.
3. Disconnect the metering oil pump driver connector.
4. Verify that the resistance is as indicated in the table.

1. If not within the specification, replace the metering oil pump driver. (See «METERING OIL PUMP DRIVER REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S25045287202010072700000) .)

Scheme 44

Metering Oil Pump Driver Resistance

METERING OIL PUMP DRIVER RESISTANCE SPECIFICATIONS