DTC P0227 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]

DTC P0227	Idle switch circuit low input
DETECTION CONDITION	• The PCM monitors the input voltage from APP sensor No.1 when the idle switch is off. If the input voltage is less than 0.86 V for 1.5 s, the PCM determines that the idle switch circuit has a malfunction.
POSSIBLE CAUSE	• Idle switch malfunction. • Accelerator pedal misadjustment. • Connector or terminal malfunction • Open circuit in wiring harness between Idle switch terminal A and PCM terminal 161 • Open circuit in wiring harness between Idle switch terminal B and body ground. • PCM malfunction

DTC P0227

Idle switch circuit low input

DETECTION CONDITION

• The PCM monitors the input voltage from APP sensor No.1 when the idle switch is off. If the input voltage is less than 0.86 V for 1.5 s, the PCM determines that the idle switch circuit has a malfunction.

POSSIBLE CAUSE

• Idle switch malfunction.

• Accelerator pedal misadjustment.

• Connector or terminal malfunction

• Open circuit in wiring harness between Idle switch terminal A and PCM terminal 161

• Open circuit in wiring harness between Idle switch terminal B and body ground.

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related service information availability. • Is any related service information available?	Yes	Perform repair or diagnosis according to the available service information. If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the M-MDS to the DLC-2. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the same DTC present?	Yes	Go to the next step.
No	Intermittent concern exists. Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See INTERMITTENT CONCERN TROUBLESHOOTING [WL-C, WE-C].)
4	VERIFY RELATED PENDING CODE OR STORED DTC • Is DTC P0122 present?	Yes	Go to the next step.
No	Go to appropriate DTC troubleshooting procedure. (See DTC P0122 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]..)
5	INSPECT IDLE SWITCH CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the idle switch connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
No	Go to the next step.
6	INSPECT IDLE SWITCH POWER CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch to the ON position (Engine off). • Measure the voltage between the idle switch terminal A (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Go to go to step 8.
No	Go to the next Step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion) • Is there any malfunction?	Yes	Repair or replace the terminal, then go to step 10.
No	Repair or replace the wiring harness for an open circuit, then go to Step 10.
8	INSPECT IDLE SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch off. • Inspect for continuity between APP sensor terminal B and body ground. • Is there continuity?	Yes	Go to the next step.
No	Repair or replace the wiring harness for an open circuit, then go to Step 10.
9	INSPECT IDLE SWITCH • Inspect idle switch. (See IDLE SWITCH INSPECTION [WL-C, WE-C].) • Is there any malfunction?	Yes	Replace the idle switch, then go to the next step. (See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [WL-C, WE-C].)
No	Adjust the accelerator pedal, then go to the next step. (See ACCELERATOR PEDAL ADJUSTMENT [WL-C, WE-C].)
10	VERIFY TROUBLESHOOTING OF DTC P0227 COMPLETED • Turn the engine switch off. • Make sure to reconnect all disconnected connectors. • Turn the engine switch to the ON position (Engine off). • Clear the DTC from the memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [WL-C, WE-C].) (See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)
No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure“. (See AFTER REPAIR PROCEDURE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME on the repair order, then go to the next step.

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

• Verify related service information availability.

• Is any related service information available?

Yes

Perform repair or diagnosis according to the available service information.

If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?

• Connect the M-MDS to the DLC-2.

• Clear the DTC from the PCM memory using the M-MDS.

• Start the engine.

• Is the same DTC present?

Yes

Go to the next step.

Intermittent concern exists.

Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.

(See INTERMITTENT CONCERN TROUBLESHOOTING [WL-C, WE-C].)

VERIFY RELATED PENDING CODE OR STORED DTC

• Is DTC P0122 present?

Yes

Go to the next step.

Go to appropriate DTC troubleshooting procedure.

(See DTC P0122 [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)]..)

INSPECT IDLE SWITCH CONNECTOR FOR POOR CONNECTION

• Turn the engine switch off.

• Disconnect the idle switch connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the terminal, then go to Step 10.

Go to the next step.

INSPECT IDLE SWITCH POWER CIRCUIT FOR OPEN CIRCUIT

• Turn the engine switch to the ON position (Engine off).

• Measure the voltage between the idle switch terminal A (wiring harness-side) and body ground.

• Is the voltage B+?

Yes

Go to go to step 8.

Go to the next Step.

INSPECT PCM CONNECTOR FOR POOR CONNECTION

• Turn the engine switch off.

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion)

• Is there any malfunction?

Yes

Repair or replace the terminal, then go to step 10.

Repair or replace the wiring harness for an open circuit, then go to Step 10.

INSPECT IDLE SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT

• Turn the engine switch off.

• Inspect for continuity between APP sensor terminal B and body ground.

• Is there continuity?

Yes

Go to the next step.

Repair or replace the wiring harness for an open circuit, then go to Step 10.

INSPECT IDLE SWITCH

• Inspect idle switch.

(See IDLE SWITCH INSPECTION [WL-C, WE-C].)

• Is there any malfunction?

Yes

Replace the idle switch, then go to the next step.

(See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [WL-C, WE-C].)

Adjust the accelerator pedal, then go to the next step.

(See ACCELERATOR PEDAL ADJUSTMENT [WL-C, WE-C].)

VERIFY TROUBLESHOOTING OF DTC P0227 COMPLETED

• Turn the engine switch off.

• Make sure to reconnect all disconnected connectors.

• Turn the engine switch to the ON position (Engine off).

• Clear the DTC from the memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [WL-C, WE-C].)

(See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure“.

(See AFTER REPAIR PROCEDURE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [WL-C, WE-C (Australian, European (L.H.D. U.K.) specs.)].)

DTC troubleshooting completed.