Infiniti M45 (Y34). Manual - part 354

TROUBLE DIAGNOSIS

EC-105

C

D

E

F

G

H

I

J

K

L

M

A

EC

108

B/W

Throttle position sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

Less than 4.75V

109

LG

Mass air flow sensor 
ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

110

G

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

113

R/Y

Accelerator pedal position 
sensor signal output

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

0.4 - 0.8V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

4.0 - 5.0V

114

R/L

Heated oxygen sensor 1 
(bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm.

0 - Approximately 1.0V (Periodi-
cally change)

115

L

Heated oxygen sensor 1 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm.

0 - Approximately 1.0V (Periodi-
cally change)

116

G/R

Fuel pump control module 
check

[Ignition switch: ON]

●

More than a few seconds after turning igni-
tion switch ON

Approximately 0V

[Ignition switch: ON]

●

For a few seconds after turning ignition 
switch ON

[Engine is running]

●

Warm-up condition

●

Idle speed

4 - 6V

117

B/R

Accelerator pedal position 
sensor 2

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

More than 0.18V

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

Less than 2.37V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-106

TROUBLE DIAGNOSIS

118

R

Power steering pressure 
sensor

[Engine is running]

●

Steering wheel: Being turned.

0.5 - 4.0V

[Engine is running]

●

Steering wheel: Not being turned.

0.4 - 0.8V

119

R/L

Fuel level sensor

[Ignition switch: ON]

Approximately 0 - 4.8V
Output voltage varies with fuel 
level.

121

Y/B

Engine coolant temperature 
sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with 
engine coolant temperature.

122

G/R

Radiator coolant tempera-
ture sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with radia-
tor coolant temperature.

123

PU

Heated oxygen sensor 2 
(bank 1)

[Engine is running]

●

Revving engine from idle up to 3,000 rpm 
quickly after the following conditions are met.

–

Warm-up condition

–

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - Approximately 1.0V

124

B

Heated oxygen sensor 2 
(bank 2)

[Engine is running]

●

Revving engine from idle up to 3,000 rpm 
quickly after the following conditions are met.

–

Warm-up condition

–

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - Approximately 1.0V

125
126

W
W

Knock sensor (bank 1)
Knock sensor (bank 2)

[Engine is running]

●

Idle speed

Approximately 2.5V

151

L/B

Throttle control motor 
(Open)

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully depressed

0 - 14V

152

P

Intake valve timing control 
solenoid valve (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

7 - 12V

153

B

Throttle control motor 
ground

[Ignition switch: ON]

Approximately 0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0058E

PBIB1790E

TROUBLE DIAGNOSIS

EC-107

C

D

E

F

G

H

I

J

K

L

M

A

EC

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

154

L/W

Throttle control motor 
(Close)

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D

●

Accelerator pedal: Fully released

0 - 14V

155

W/B

Intake valve timing control 
solenoid valve (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

7 - 12V

156
159
165
168

B
B
B/W
B/W

ECM ground

[Engine is running]

●

Idle speed

Engine ground

157

L

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

158

L/Y

EVAP canister vent control 
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

163
166

R
R

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

164

PU

Data link connector

[Ignition switch: ON]

●

CONSULT-II or GST: Disconnected.

BATTERY VOLTAGE
(11 - 14V)

171

P/B

CAN communication line

[Ignition switch: ON]

Approximately 1.7 - 2.3V
Output voltage varies with the 
communication status.

174

LG/B

CAN communication line

[Ignition switch: ON]

Approximately 2.6 - 3.2V
Output voltage varies with the 
communication status.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0061E

PBIB1790E

EC-108

TROUBLE DIAGNOSIS

CONSULT-II Function (ENGINE)

ABS002DU

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

●

Diagnostic trouble codes

●

1st trip diagnostic trouble codes

●

Freeze frame data

●

1st trip freeze frame data

●

System readiness test (SRT) codes

●

Test values

●

Others

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the 
indications on the CONSULT-II unit.

Self-diagnostic results

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data 
can be read and erased quickly.*

Data monitor

Input/Output data in the ECM can be read.

Data monitor (SPEC)

Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the 
other data monitor items can be read.

CAN diagnostic support 
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Active test

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also 
shifts some parameters in a specified range.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

ECM part number

ECM part number can be read.