SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P1653, P1656
| DTC Code | DTC Name |
|---|---|
| P1653 | Exhaust Exterior Valve 1 Circuit High |
| P1656 | Exhaust Exterior Valve 2 Circuit High |
DESCRIPTION
Refer to DTC P1651.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1653 | Exhaust Exterior Valve 1 Circuit High | Drive motor overcurrent detected for 10 seconds (1trip detection logic). |
|
Does not come on | DTC stored |
| P1656 | Exhaust Exterior Valve 2 Circuit High | Drive motor overcurrent detected for 10 seconds (1trip detection logic). |
|
Does not come on | DTC stored |
MONITOR DESCRIPTION
The exhaust change valve driver operates the exhaust pipe gas control actuator sub-assembly and monitors the current. When an overcurrent occurs, the exhaust change valve driver uses the status signal to send a malfunction signal to the ECM.
This DTC is stored when the malfunction signal sent from the exhaust change valve driver is received by the ECM.
CONFIRMATION DRIVING PATTERN
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Connect the GTS to the DLC3.
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Turn the engine switch on (IG).
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Turn the GTS on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the engine switch off and wait for at least 30 seconds.
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Start the engine.
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Idle the engine for 5 seconds.
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Turn the GTS on.
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Enter the following menus: Powertrain / Engine / Active Test / Control the Exhaust Exterior Valve Angle.
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In the Active Test, wait for at least 20 seconds with the exhaust change valve opening position at 100%.
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In the Active Test, wait for at least 20 seconds with the exhaust change valve opening position at 0%.
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Enter the following menus: Powertrain / Engine / Trouble Codes.
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Read the pending DTCs.
Tech Tips
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If a pending DTC is output, the system is malfunctioning.
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If a pending DTC is not output, perform the following procedure.
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Enter the following menus: Powertrain / Engine / Utility / All Readiness.
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Input the DTC: P1653 or P1656.
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Check the DTC judgment result.
GTS Display Description NORMAL
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DTC judgment completed
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System normal
ABNORMAL
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DTC judgment completed
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System abnormal
INCOMPLETE
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DTC judgment not completed
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Perform driving pattern after confirming DTC enabling conditions
N/A
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Unable to perform DTC judgment
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Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
Tech Tips
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If the judgment result shows NORMAL, the system is normal.
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If the judgment result shows ABNORMAL, the system has a malfunction.
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If the judgment result shows INCOMPLETE or N/A, perform steps [F] through [H].
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CAUTION / NOTICE / HINT
CAUTION:
Do no perform the Active Test with the exhaust pipe gas control actuator sub-assembly removed.
Tech Tips
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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.
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If DTC P1653 is output, check the white wires with protective coating on the exhaust pipe gas control actuator sub-assembly wiring system.
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If DTC P1656 is output, check the black wires with protective coating on the exhaust pipe gas control actuator sub-assembly wiring system.
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The connector for the exhaust pipe gas control actuator sub-assembly can be connected on either the left or right side.
When installing the wire harness after performing repairs, install it at the specified position.
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Connect the No. 1 exhaust change valve driver driver to the No. 1 exhaust pipe gas control actuator sub-assembly connected to the white wires with protective coating
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Connect the No. 2 exhaust change valve driver to the No. 2 exhaust pipe gas control actuator sub-assembly connected to the black wires with protective coating.
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During troubleshooting, refer to the illustration below to check the colors of the profective coating of the exhaust pipe gas control actuator sub-assembly wire harness.
*a No. 1 exhaust change valve driver *b No. 2 exhaust change valve driver *c Wire harness (white or black wires with protective coating) *d Exhaust pipe gas control actuator sub-assembly
(No. 1: white wires with protective coating)
(No. 2: black wires with protective coating)
PROCEDURE
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CHECK IF DTC OUTPUT RECURS
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Switch connector M2, M4 and M1, M3 on the exhaust pipe gas control actuator sub-assembly.
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Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
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Enter the following menus: Powertrain / Engine / Trouble Codes.
Powertrain > Engine > Trouble Codes -
Read the pending DTCs.
Result Result Proceed to DTCs do not change A DTCs change B
B 
INSPECT EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE) Click here
A 
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CHECK IF DTC OUTPUT RECURS
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Switch connector X80 and X81 on the exhaust change valve driver.
Tech Tips
The wire harnesses are different lengths. Therefore, remove the exhaust change valve driver and change the position of the connnector.
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Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
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Enter the following menus: Powertrain / Engine / Trouble Codes.
Powertrain > Engine > Trouble Codes -
Read the pending DTCs.
Result Result Proceed to DTCs do not change A DTCs change B
A 
REPAIR OR REPLACE HARNESS OR CONNECTOR (EXHAUST CHANGE VALVE DRIVER - EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY)
B
REPLACE EXHAUST CHANGE VALVE DRIVER Click here
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INSPECT EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE)
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Inspect the exhaust tailpipe assembly (exhaust change valve).
Result Proceed to OK NG
OK
REPLACE EXHAUST PIPE GAS CONTROL ACTUATOR SUB-ASSEMBLY Click here
NG
REPLACE EXHAUST TAILPIPE ASSEMBLY (EXHAUST CHANGE VALVE) Click here
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