RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM C

7GR-FKS ENGINE CONTROL  SFI SYSTEM  P041512  AIR System Switching Valve "B" Circuit High Circuit Short to Battery  P041514  AIR System Switching Valve "B" Circuit Low Circuit Short to Ground or Open  


DESCRIPTION

The ECM operates the AI VALVE relay which causes the emission control valve (for bank 2) to operate.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P041512 AIR System Switching Valve "B" Circuit High Circuit Short to Battery Open or short in the AI VALVE relay circuit for 3 seconds (1 trip detection logic).
·

Open or short in AI VALVE relay circuit

·

AI VALVE relay

·

ECM


Comes on DTC stored SAE Code: P1457
P041514 AIR System Switching Valve "B" Circuit Low Circuit Short to Ground or Open Open or short in the AI VALVE relay circuit for 3 seconds (1 trip detection logic).
·

Open or short in AI VALVE relay circuit

·

AI VALVE relay

·

ECM


Comes on DTC stored SAE Code: P1456

MONITOR DESCRIPTION

These DTCs are designed to detect a malfunction in the AI VALVE relay circuit. When the system is normal, the battery voltage is applied to terminal AIR1 of the ECM while the AI VALVE relay is turned off, and the battery voltage is not applied to terminal AIR1 of the ECM while the AI VALVE relay is turned on. The ECM illuminates the MIL and stores a DTC when either one of the following conditions is detected.

·

The battery voltage is not applied to terminal AIR1 while the AI VALVE relay is off.

·

The battery voltage is applied to terminal AIR1 while the AI VALVE relay is on.


CONFIRMATION DRIVING PATTERN

NOTICE:
·

This Secondary Air Injection Check only allows technicians to operate the secondary air injection system for a maximum of 5 seconds. Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks. While secondary air injection system operation using the GTS is prohibited, the GTS display indicates the prohibition (WAIT or ERROR). If ERROR is displayed on the GTS during the test, stop the engine for 10 minutes, and then try again.

·

Performing the Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If necessary, leave an interval of several minutes between System Check operations to prevent the system from overheating.

·

When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the ignition switch turned to ON or the engine running.

·

Turn the ignition switch off when the Secondary Air Injection Check operation finishes.



1.

Start the engine and warm it up.

2.

Turn the ignition switch off.

3.

Connect the GTS to the DLC3.

4.

Turn the ignition switch to ON.

5.

Turn the GTS on.

6.

Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

7.

Turn the ignition switch off and wait for at least 30 seconds.

8.

Turn the ignition switch to ON and turn the GTS on.

9.

Enter the following menus: Powertrain / Engine / Utility / Secondary Air Injection Check / Automatic Mode.

10.

Start the engine after the GTS initialization is finished.

11.

Perform the System Check operation by pressing Next.

12.

Perform the following to confirm the secondary air injection system pending DTCs: Press Exit.

13.

Enter the following menus: Powertrain / Engine / DTC.

14.

Read pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



15.

After Secondary Air Injection Check is completed, check All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.

16.

Input the DTC: P041512 or P041514.

17.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions



HINT:
·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE, perform the Confirmation Driving Pattern and the DTC judgment result again.




WIRING DIAGRAM

A439422E03
0.281,0.104 1.344,0.385 1.063,0.281 12 false for Bank 2: 0.698,1.573 0.906,1.771 0.208,0.198 10 false 1 0.708,0.948 0.917,1.146 0.208,0.198 10 false 4 2.427,0.938 2.635,1.135 0.208,0.198 10 false 8 2.438,1.573 2.646,1.771 0.208,0.198 10 false 9 0.667,1.135 0.938,1.354 0.271,0.219 10 false 1E 2.385,1.135 2.656,1.354 0.271,0.219 10 false 1E 2.385,1.76 2.656,1.979 0.271,0.219 10 false 1E 0.677,1.76 0.948,1.979 0.271,0.219 10 false A 0.958,1.896 1.667,2.083 0.708,0.188 10 false EFI-MAIN 1.625,2.083 2.406,2.271 0.781,0.188 10 false EFI MAIN 0.917,2.396 2.49,2.625 1.573,0.229 10 false No. 1 Integration Relay 0.635,4.927 1.354,5.177 0.719,0.25 10 false Battery 2.583,5.469 2.969,5.667 0.385,0.198 10 false E31 2.594,5.667 4.302,6.198 1.708,0.531 10 false Emission Control Valve Set (for Bank 2) 5.177,5.083 5.385,5.281 0.208,0.198 10 false 4 5.177,3.76 5.385,3.958 0.208,0.198 10 false 3 4.667,5.646 4.875,5.844 0.208,0.198 10 false 1 5.177,4.396 5.385,4.594 0.208,0.198 10 false 2 4.479,3.615 4.865,3.833 0.385,0.219 10 false +BL 4.708,3.885 5.094,4.104 0.385,0.219 10 false AIP2 4.75,4.531 5.208,4.729 0.458,0.198 10 false VC2 4.771,5.188 5.177,5.396 0.406,0.208 10 false E22 4.396,5.396 4.885,5.625 0.49,0.229 10 false GNDL 5.938,3.719 6.146,3.917 0.208,0.198 10 false 30 5.938,4.396 6.25,4.625 0.313,0.229 10 false 23 5.927,5.063 6.135,5.26 0.208,0.198 10 false 22 5.938,1.01 6.146,1.208 0.208,0.198 10 false 25 6,1.646 6.208,1.844 0.208,0.198 10 false 6 4.979,1.635 5.188,1.833 0.208,0.198 10 false 2 4.177,1.646 4.385,1.844 0.208,0.198 10 false 1 4.99,2.51 5.198,2.708 0.208,0.198 10 false 5 4.198,2.51 4.406,2.708 0.208,0.198 10 false 3 4.302,2.729 5.073,2.958 0.771,0.229 10 false AI VALVE 4.677,3.375 4.885,3.573 0.208,0.198 10 false 5 6.24,1.125 6.74,1.344 0.5,0.219 10 false MREL 6.25,1.76 6.865,1.958 0.615,0.198 10 false AIR1 6.25,3.854 6.865,4.052 0.615,0.198 10 false AIP2 6.229,4.531 6.844,4.729 0.615,0.198 10 false VCAI 6.24,5.188 6.719,5.396 0.479,0.208 10 false EAIP 6.406,5.677 6.865,5.875 0.458,0.198 10 false A1 1.5,3.281 2.781,3.5 1.281,0.219 10 false AIR PMP NO. 2 0.5,4.042 1.271,4.417 0.771,0.375 10 false FL MAIN 6.406,5.854 6.865,6.052 0.458,0.198 10 false ECM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses of circuits related to this system before performing the following inspection procedure.


HINT:
·

By using the GTS to perform the Secondary Air Injection Check operation in the System Check, the air fuel ratio and the pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions.

·

Bank 1 refers to the bank that includes the No. 1 cylinder*.

*: The No. 1 cylinder is the cylinder which is farthest from the transmission.

·

Bank 2 refers to the bank that does not include the No. 1 cylinder.

·

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.



PROCEDURE

1.INSPECT AI VALVE RELAY
a.

Inspect the AI VALVE relay.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION


Result:
Result
OK
NG



OK

2.CHECK TERMINAL VOLTAGE (POWER SOURCE OF AI VALVE RELAY)

NG

REPLACE AI VALVE RELAY

2.CHECK TERMINAL VOLTAGE (POWER SOURCE OF AI VALVE RELAY)
a.
A440804C01
0.219,0.177 0.531,0.375 0.313,0.198 10 false *1 1.635,2.906 1.948,3.104 0.313,0.198 10 false *2
*1 No. 1 Engine Room Relay Block and Junction Block Assembly
*2 AI VALVE Relay


Remove the AI VALVE relay from the No. 1 engine room relay block and junction block assembly.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Switch Condition Specified Condition
1 (AI VALVE relay) - Body ground Ignition switch ON 11 to 14 V
3 (AI VALVE relay) - Body ground Always 11 to 14 V



Result:
Result
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (ECM - AI VALVE RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (ECM - AI VALVE RELAY)
a.

Remove the AI VALVE relay from the No. 1 engine room relay block and junction block assembly.


b.

Disconnect the ECM connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
2 (AI VALVE relay) - A1-6 (AIR1) Always Below 1 Ω
2 (AI VALVE relay) or A1-6 (AIR1) - Body ground and other terminals Always 10 kΩ or higher



Result:
Result
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR