NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS [FN4A-EL]

• If a noise is emitted during shifting only, the malfunction is in shift solenoid D, E or shift solenoid A, B, C. If a noise is emitted during shifting at certain gears only or during deceleration only, it is gear noise.

• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [PCM (FN4A-EL)].) (See BASIC INSPECTION [FN4A-EL].)

STEP	INSPECTION	ACTION
1	Inspect the engine condition. Is any engine concern (i. e. rough idle)?	Yes	Go to the appropriate symptom troubleshooting. (See SYMPTOM DIAGNOSTIC INDEX [MZR 1.6].)
No	Go to the next step.
2	Does the noise stop when the solenoid connector is disconnected?	Yes	Go to the next step.
No	Overhaul the control valve body and repair or replace any malfunctioning parts. If any problem remains: • Overhaul the transaxle and repair or replace any malfunctioning parts.
3	Inspect the following PID values using the M-MDS: (See PCM INSPECTION [MZR 1.6].) (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [PCM (FN4A-EL)].) • APP • VSS • TSS Are the PID values normal?	Yes	Go to the next step.
No	Repair or replace any malfunctioning parts.
4	Disconnect the PCM connector. Measure the resistance between ground terminal at the PCM connector and body ground. Is the resistance less than 5.0 ohms?	Yes	Go to the next step.
No	Repair or replace the wiring harness for a possible open circuit.
5	Inspect the LPS PID value using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [PCM (FN4A-EL)].) Is the PID value normal?	Yes	Overhaul the control valve body and repair or replace any malfunctioning parts. If any problem remains: • Overhaul the transaxle and repair or replace any malfunctioning parts.
No	Repair or replace any malfunctioning parts.
6	• Verify the test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If the malfunction remains, inspect the related Service Information and perform repair or diagnosis. • If the vehicle is repaired, troubleshooting is completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 1.6].)

STEP

INSPECTION

ACTION

Inspect the engine condition.

Is any engine concern (i. e. rough idle)?

Yes

Go to the appropriate symptom troubleshooting.

(See SYMPTOM DIAGNOSTIC INDEX [MZR 1.6].)

Go to the next step.

Does the noise stop when the solenoid connector is disconnected?

Yes

Go to the next step.

Overhaul the control valve body and repair or replace any malfunctioning parts.

If any problem remains:

• Overhaul the transaxle and repair or replace any malfunctioning parts.

Inspect the following PID values using the M-MDS:

(See PCM INSPECTION [MZR 1.6].)

(See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [PCM (FN4A-EL)].)

• APP

• VSS

• TSS

Are the PID values normal?

Yes

Go to the next step.

Repair or replace any malfunctioning parts.

Disconnect the PCM connector.

Measure the resistance between ground terminal at the PCM connector and body ground.

Is the resistance less than 5.0 ohms?

Yes

Go to the next step.

Repair or replace the wiring harness for a possible open circuit.

Inspect the LPS PID value using the M-MDS.

(See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [PCM (FN4A-EL)].)

Is the PID value normal?

Yes

Overhaul the control valve body and repair or replace any malfunctioning parts.

If any problem remains:

• Overhaul the transaxle and repair or replace any malfunctioning parts.

Repair or replace any malfunctioning parts.

• Verify the test results.

― If normal, return to the diagnostic index to service any additional symptoms.

― If the malfunction remains, inspect the related Service Information and perform repair or diagnosis.

• If the vehicle is repaired, troubleshooting is completed.

• If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 1.6].)

20	Noise occurs at idle when vehicle is stopped in all positions
DESCRIPTION	• Transaxle is noisy in all positions when the vehicle is idling.
POSSIBLE CAUSE	• The malfunction is in the oil pump which causes a high-pitched noise to be emitted from the transaxle at idle. Note • If a noise is emitted during shifting only, the malfunction is in shift solenoid D, E or shift solenoid A, B, C. If a noise is emitted during shifting at certain gears only or during deceleration only, it is gear noise. • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [PCM (FN4A-EL)].) (See BASIC INSPECTION [FN4A-EL].)