Transmission and Drivetrain: Testing and Inspection
4WD Control System Operation InspectionNOTE:
^ If it is difficult to operate shift between 2H and 4H while vehicle is moving, stop vehicle and operate "2WD <-> 4WD" switch.
^ 2WD/4WD indicator will blink during shifting process.
^ When shifting to N or 4L does not work, try the following procedure.
^ For M/T model, shift transmission to N (Neutral) position, turn ignition switch to ON position, depress clutch while engine is running, and then try shifting again.
^ For A/T model, turn ignition switch to ON position, move vehicles lowly back or forth a few feet, and then try shifting again.
^ When shifting from N does not work, turn ignition switch to ON position while 2WD/4WD indicator is blinking, wait for more than 5 seconds then start engine. Transfer can then be shifted to 4H or 2H.
1. Inspect shifting operation between 2H and 4H as follows.
a. Turn ignition switch to ON position.
b. Position front wheels to straight ahead state.
c. Confirm that vehicle is under the following condition.
^ Vehicle speed is less than 100 km/h (60 mph).
d. Check that 4WD indicator turns on and off each time "2WD <-> 4WD" switch is pushed.
2. Inspect shifting operation between 4H and 4L as follows.
a. Turn ignition switch to ON position.
b. Position front wheels to straight ahead state.
c. Confirm that vehicle is under the following conditions.
^ Transfer shift position is 4H.
^ Transmission shift lever is "N" position. (for A/T model)
^ Clutch is depressed fully. (for M/T model)
^ Vehicle is stopped completely.
d. Check that 4L indicators (in combination meter and "4L" switch) turn on and off each time "4L" switch is pushed.
3. Inspect shifting operation between 2H and N as follows. a) Turn ignition switch to ON position.
b. Position front wheels to straight ahead state.
c. Confirm that vehicle is under the following conditions.
^ Transfer shift position is 2H.
^ Transmission shift lever is "N" position. (for A/T model)
^ Clutch is depressed fully. (for M/T model)
^ Vehicle is stopped completely.
d. Check that N indicator and buzzer turn on and off each time "4L" switch is kept pushing for 5 seconds.
Visual Inspection
Check the following parts and systems visually.
DTC Check
Using SUZUKI Scan Tool
1. Turn ignition switch to OFF position.
2. Connect SUZUKI scan tool to data link connector (DLC) (1) located on underside of instrument panel.
Special Tool (A): SUZUKI scan tool
3. Turn ignition switch to ON position.
4. Read DTC according to instructions displayed on SUZUKI scan tool and print it or write it down. Refer to SUZUKI scan tool operator's manual for further details.
If communication between SUZUKI scan tool and 4WD control module is not possible, check if SUZUKI scan tool is communicable by connecting it to 4WD control module in another vehicle. If communication is possible in this case, SUZUKI scan tool is in good condition. Then check data link connector and serial data line (circuit) in the vehicle with which communication was not possible. After completing the check, turn ignition switch OFF and disconnect SUZUKI scan tool from data link connector.
Without Using SUZUKI Scan Tool
1. Check 2WD/4WD indicator referring to 2WD/4WD Indicator Operation Check: Motor-Shift Type.
2. With ignition switch OFF position, disconnect SUZUKI scan tool if connected and using service wire (1), connect diagnosis switch terminal ("PNK" wire) (2) to ground terminal ("BLK" wire) (3) in diagnosis connector (4).
3. With ignition switch ON position and leaving engine OFF, read DTC from flashing pattern of 2WD/4WD indicator which represents DTC as shown in example below and write it down. For detail of DTC, refer to DTC Table: Motor-Shift Type.
NOTE:
^ DTC No.12 means none of the malfunction DTCs is identified.
^ When more than 2 DTCs are stored in memory, flashing for each DTC is repeated three times starting with the smallest DTC number in increasing order.
And flashing of these codes is repeated as long as diagnosis terminal is grounded and ignition switch is ON position.
^ If DTC is not outputted, check according to DTC is Not Outputted Even When Diagnosis Switch Terminal is Connected to Ground: Motor-Shift Type.
4. After completing the check, turn ignition switch OFF, disconnect service wire from diagnosis connector.
DTC Clearance
Using SUZUKI Scan Tool
1. Turn ignition switch to OFF position.
2. Connect SUZUKI scan tool to data link connector (DLC) (1) located on underside of instrument panel.
Special Tool (A): SUZUKI scan tool
3. Turn ignition switch to ON position.
4. Erase DTC according to instructions displayed on SUZUKI scan tool. Refer to SUZUKI scan tool operator's manual for further details.
5. After completing clearance, turn ignition switch OFF and disconnect SUZUKI scan tool from data link connector (DLC).
6. Perform DTC Check: Motor-Shift Type and confirm that NO CODES is displayed.
Without Using SUZUKI Scan Tool
1. Turn ignition switch to ON position.
2. Using service wire (1), connect diagnosis switch terminal ("PNK" wire) (2) to ground terminal ("BLK" wire) (3) in diagnosis connector (4) more than 5 times at about 1 second interval within 10 seconds.
3. Wait more than 9 seconds.
4. Perform DTC Check: Motor-Shift Type and confirm that DTC No. 12 is displayed.
DTC Table
NOTE:
^ When 2 or more codes are indicated by 2WD/4WD indicator, 4L indicators (in combination meter and on "4L" switch) and N indicator flashing pattern, the lowest numbered code will appear first.
^ Current DTC and history DTC can be identified by lighting and flashing of 2WD/4WD indicator, 4L indicators (in combination meter and "4L" switch) and N indicator as follows. However, if a multiple number of DTCs are set and one of them is a current DTC, these indicators keep flashing after turning ignition switch to ON position. Therefore, it is not possible to identify any of them as to whether it is a current one or a history one. (But SUZUKI scan tool will make identification possible.)
Scan Tool Data
Reference: Scan Tool Data Definitions: Motor-Shift Type
As the data values given in the following table are standard values estimated on the basis of values obtained from the normally operating vehicles by using a scan tool, use them as reference values. Even when the vehicle is in good condition, there may be cases where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not be made by checking with these data alone. Also, condition in the following table that can be checked by the scan tool are those detected by 4WD control module and output from 4WD control module as commands and there may be cases where the transfer or actuator is not operating (in the condition) as indicated by the scan tool.
NOTE: The following scan tool data related to 4WD control system can be checked only by communicating with 4WD control module.
Fail-Safe Table
This function is provided by the safe mechanism that assures safe driveability even when the actuator, switch, sensor or its circuit fails. The following table shows the fail safe function for each fail condition of sensor, actuator, switch, 4WD control module or its circuit.
Scan Tool Data Definitions
4WD Control Symptom Diagnosis
Diagnose transfer assembly after performing the following inspections.
1. Perform 4WD control system check referring to 4WD Control System Check: Motor-Shift Type.
2. Confirm 4WD control system operation referring to 4WD Control System Operation: Motor-Shift Type
3. Check transfer oil level for insufficient or incorrect oil referring to Transfer Gear Oil Inspection and Change:Motor-Shift Type.
4. Check transfer mountings for wear or looseness.
2WD/4WD Indicator Does Not Come ON at Ignition Switch ON
Wiring Diagram
Circuit Description
2WD/4WD indicator is operated by 4WD control module. If the 4WD control system is in good condition and transfer shift position is 2H, 4WD control module turns 2WD/4WD indicator ON at the turn ignition switch ON, keeps it ON for 2 seconds and then turn 4WD indicator OFF. If an abnormality in the system is detected, 2WD/4WD indicator flashes by 4WD control module.
Troubleshooting
2WD/4WD Indicator Comes ON Steady
Wiring Diagram
Circuit Description
If the 4WD control system is in good condition and transfer shift position is 2H, 4WD control module turns 2WD/4WD indicator ON at the ignition switch ON, keeps it ON for 2 seconds and then turns 4WD indicator OFF. If an abnormality in the system is detected, 2WD/4WD indicator made to flash by 4WD control module.
Troubleshooting
2WD/4WD Indicator Flashes Continuously while Ignition Switch is ON
Wiring Diagram
Circuit Description
When diagnosis switch terminal is shorted or connected to the ground with ignition switch ON,
DTC is indicated by flashing of 2WD/4WD indicator only in the following cases.
^ Normal DTC is indicated if no malfunction DTC is detected in the 4WD control module.
^ A history malfunction DTC is indicated by flashing of the 4WD indicator if a current malfunction DTC is not detected at that point although a history malfunction DTC is stored in memory.
Troubleshooting