Nissan Frontier. Instruction — part 514
P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-627
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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P0037, P0038, P0057, P0058 HO2S2 HEATER
Description
INFOID:0000000009481261
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
On Board Diagnosis Logic
INFOID:0000000009481262
DTC Confirmation Procedure
INFOID:0000000009481263
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.
WITH CONSULT
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
Sensor
Input signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Heated oxygen sensor 2
heater control
Heated oxygen sensor 2 heater
Engine coolant temperature sensor
Engine coolant temperature
Mass air flow sensor
Amount of intake air
Engine speed rpm
Heated oxygen sensor 2 heater
Above 3,600
OFF
Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load
ON
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P0037
0037
(Bank 1)
Heated oxygen
sensor 2 heater
control circuit low
The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.)
• Harness or connectors
(The heated oxygen sensor 2 heater circuit is
open or shorted.)
• Heater oxygen sensor 2 heater
P0057
0057
(Bank 2)
P0038
0038
(Bank 1)
Heated oxygen
sensor 2 heater
control circuit high
The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.)
• Harness or connectors
(The heated oxygen sensor 2 heater circuit is
shorted.)
• Heater oxygen sensor 2 heater
P0058
0058
(Bank 2)
EC-628
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P0037, P0038, P0057, P0058 HO2S2 HEATER
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Start the engine and keep the engine speed between 3,500 rpm and 4,000 rpm for at least 1 minute under
no load.
7. Let engine idle for 1 minute.
8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009481264
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Disconnect heated oxygen sensor 2 harness connector.
2. Turn ignition switch ON.
3. Check voltage between HO2S2 terminal 4 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
Voltage: Battery voltage
BBIA0540E
P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-629
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
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• IPDM E/R harness connector E119
• 15 A fuse (No.54)
• Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair harness or connectors.
4.
CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK HEATED OXYGEN SENSOR 2 HEATER
EC-629, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace malfunctioning heated oxygen sensor 2. Refer to
6.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009481265
HEATED OXYGEN SENSOR 2 HEATER
1. Check resistance between HO2S2 terminals as follows.
2. If NG, replace heated oxygen sensor 2.
CAUTION:
• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
• Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
DTC
Terminals
Bank
ECM
Sensor
P0037, P0038
37
2
1
P0057, P0058
41
2
2
Continuity should exist.
Terminal No.
Resistance
2 and 3
3.4 - 4.4
Ω at 25°C (77°F)
1 and 2, 3, 4
∞ Ω
(Continuity should not exist)
4 and 1, 2, 3
EC-630
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR USA AND CANADA]
P0075, P0081 IVT CONTROL SOLENOID VALVE
P0075, P0081 IVT CONTROL SOLENOID VALVE
Component Description
INFOID:0000000009481266
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
On Board Diagnosis Logic
INFOID:0000000009481267
DTC Confirmation Procedure
INFOID:0000000009481268
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.
Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000009481269
1.
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake valve timing control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check voltage between intake valve timing control solenoid valve terminal 2 and ground with CONSULT
or tester.
PBIB1842E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0075
0075
(Bank 1)
Intake valve timing control
solenoid valve circuit
An improper voltage is sent to the ECM
through intake valve timing control solenoid
valve.
• Harness or connectors
(Intake valve timing control solenoid valve
circuit is open or shorted.)
• Intake valve timing control solenoid valve
P0081
0081
(Bank 2)
Voltage: Battery voltage
BBIA0553E
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