On-Board Diagnostic [Steering System]: Other Mazda 3 BM

FOREWORD

1. If there is any vehicle malfunction complaint lodged by a customer, perform malfunction diagnosis according to the troubleshooting procedure.

Troubleshooting Procedure Flow Chart. Scheme 77

Action for Non-Repeatable Malfunction

1. If the malfunction does not recur, verify the malfunction cause by performing the following actions

Scheme 78

Scheme 79

Scheme 80

1. Verify that a DTC has been recorded in the memory using the M-MDS. (See «ELECTRO HYDRAULIC POWER ASSIST STEERING (EHPAS) ON-BOARD DIAGNOSIS»(ref-579453-S13370150382013100700000).) (Scheme 78): Identifying Data Link Connector (DLC-2)
2. Perform a simulation test in the simulation mode based on the repair order form, record the data at that time, and detect the malfunction cause.
3. Shake the wiring harness or connector of the electrical component which is suspected to be the cause of the malfunction, and inspect for the occurrence of any malfunction or DTCs. (Scheme 79): Shaking Wiring Harness Or Connector Of Electrical Component
4. Inspect the female terminals for poor connection. (Scheme 80): Inspecting Female Terminals For Poor Connection

On-Board Diagnostic (OBD) Test Description

1. The OBD test inspects the integrity and function of the EHPAS and outputs the results when requested by the specific tests.
2. On-board diagnostic test also: Provides a quick inspection of the EHPAS usually performed at the start of each diagnostic procedure. Provides verification after repairs to ensure that no other faults occurred during service.
3. The OBD test is divided into 2 tests: Read/clear diagnostic results, PID monitor and record.

PID/Data monitor and record

1. This function allows access of certain data values, input signals, calculated values, and system status information.

Scheme 81

1. Connect the M-MDS (IDS) to the DLC-2. (Scheme 81): Identifying Data Link Connector (DLC-2)
2. After the vehicle is identified, select the following items from the initialization screen of the IDS. Select "Self Test". Select "Modules". Select "EPS".
3. Verify the DTC according to the directions on the screen. If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
4. After completion of repairs, clear all DTCs stored in the EHPAS CM. (See «CLEARING DTCS PROCEDURE»(ref-579352-S36466448962013100700000).)

Clearing DTCs Procedure

1. Connect the M-MDS (IDS) to the DLC-2. see scheme 7: Identifying Data Link Connector (DLC-2)
2. After the vehicle is identified, select the following items from the initialization screen of the IDS. Select "Self Test". Select "Modules". Select "EPS".
3. Verify the DTC according to the directions on the screen.
4. Press the clear button on the DTC screen to clear the DTC.
5. Switch the ignition to off.
6. Switch the ignition to ON and wait for 5 s or more.
7. Perform DTC inspection. (See «READING DTCS PROCEDURE»(ref-579439-S13719432922013100700000).)
8. Verify that no DTCs are displayed.

PID/Data Monitor and Record Procedure

1. Connect the M-MDS (IDS) to the DLC-2. see scheme 8: Identifying Data Link Connector (DLC-2)
2. After the vehicle is identified, select the following items from the initialization screen of the IDS. Select "DataLogger". Select "Modules". Select "EPS".
3. Select the applicable PID from the PID table.
4. Verify the PID data according to the directions on the screen. NOTE: The PID data screen function is used for monitoring the calculated value of input/output signals in the module. Therefore, if the monitored value of the output parts is not within the specification, it is necessary to inspect the monitored value of input parts corresponding to the applicable output part control. In addition, because the system does not display an output part malfunction as an abnormality in the monitored value, it is necessary to inspect the output parts individually.

PID/DATA Monitor Table