DTC Check
Display Item List
Refer to [ DTC INDEX: DIFFERENTIAL LOCK CONTROL UNIT ].
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
| Possible cause and SUSPECTED PARTS | [A] | [B] | [C] | [D] | [E] | [F] | [G] | [H] | [I] | [J] | [K] | [L] | [M] | [N] | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Symptom | Noise | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
| X: Applicable [A]: Gear tooth rough [B]: Gear contact improper [C]: Tooth surfaces worn [D]: Backlash incorrect [E]: Companion flange excessive runout [F]: Gear oil improper [G]: PROPELLER SHAFT [H]: REAR AXLE [I]: REAR SUSPENSION [J]: TIRES [K]: ROAD WHEEL [L]: AXLE SHAFT [M]: BRAKES [N]: STEERING | |||||||||||||||
NVH TROUBLESHOOTING CHART
Scheme 96
Data are reference value and are measured between each terminal and ground.
| Terminal No. (Wire color) | Description | Condition | Voltage (V) (Approx.) | ||
|---|---|---|---|---|---|
| + | Signal name | Input/Output | |||
| 1 (W/G) | Ground | Ign power supply | Input | Ignition ON or START | Battery voltage |
| 2 (W/G) | Ground | Ign power supply | Input | Ignition ON or START | Battery voltage |
| 3 (B) | Ground | Ground | Input | Ignition ON | Less than 0.2V |
| 4 (P) | CAN-L | ||||
| 5 (L) | CAN-H | ||||
| 9 (Y) | Ground | Differential lock mode switch (ON) | Input | Differential lock mode switch: ON | Battery voltage |
| Differential lock mode switch: OFF | 0V | ||||
| 10 (B) | Ground | Ground | Input | Ignition ON | Less than 0.2V |
| 11 (GR) | Ground | Differential lock solenoid (LO) | Output | Differential lock mode switch: ON | 0V |
| Differential lock mode switch: OFF | Battery voltage | ||||
| 12 (L) | Ground | Differential lock solenoid (HIGH) | Output | Differential lock mode switch: ON | 0V |
| Differential lock mode switch: OFF | Battery voltage | ||||
| 13 (SB) | K-LINE | ||||
| 15 (R/Y) | Ground | Battery power supply (Memory back-up) | Input | Ignition OFF | Battery voltage |
| 20 (BR) | Ground | Differential lock position switch | Input | Differential lock mode switch: ON (DIFF LOCK indicator lamp: ON) | 0V |
| Differential lock mode switch: OFF (DIFF LOCK indicator lamp: OFF) | Battery voltage | ||||
| 21 (SB) | Ground | DIFF LOCK indicator lamp | Output | DIFF LOCK indicator lamp: ON | 0V |
| DIFF LOCK indicator lamp: OFF | Battery voltage | ||||
| 22 (G) | Ground | Differential lock mode switch (OFF) | Input | Differential lock mode switch: ON | 0V |
| Differential lock mode switch: OFF | Battery voltage | ||||
TERMINAL DESCRIPTION
| CAUTION | When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals. |
| Items (SDT screen terms) | Diagnostic item is detected when... | Check item |
|---|---|---|
| INITIAL START [P1833] | Due to removal of battery which cuts off power supply to differential control unit, self-diagnosis memory function is suspended. | [ P1833 INITIAL START ] |
| CONTROL UNIT 1 [P1834] | Malfunction is detected in the memory (RAM) system of differential lock control unit. | [ P1834 CONTROL UNIT 1 ] |
| CONTROL UNIT 2 [P1835] | Malfunction is detected in the memory (ROM) system of differential lock control unit. | [ P1835 CONTROL UNIT 2 ] |
| CONTROL UNIT 3 [P1836] | Malfunction is detected in the memory (EEPROM) system of differential lock control unit. | [ P1836 CONTROL UNIT 3 ] |
| CONTROL UNIT 4 [P1837] | AD converter system of differential lock control unit is malfunctioning. | [ P1837 CONTROL UNIT 4 ] |
| ON SW [P1838] | More than two switch inputs are simultaneously detected due to short circuit of differential lock mode switch. | [ P1838 ON SWITCH ] |
| POSI SW ON [P1839] | When differential lock position switch is ON, rotation difference occurs in wheel speed (rear wheel right and left). | [ P1839 POSITION SWITCH ON ] |
| RELAY [P1844] | Differential lock control unit detects as irregular by comparing target value with monitor value. | [ P1844 RELAY ] |
| SOL CIRCUIT [P1847] | Malfunction is detected in differential lock control unit internal circuit. | [ P1847 SOLENOID CIRCUIT ] |
| SOL DISCONNECT [P1848] | Differential lock solenoid internal circuit or harness is open. Differential lock solenoid relay does not switch to ON position. | [ P1848 SOLENOID DISCONNECT ] |
| SOL SHORT [P1849] | Differential lock solenoid internal circuit or harness is shorted. | [ P1849 SOLENOID SHORT ] |
| SOL CURRENT [P1850] | Differential lock solenoid relay does not switch to OFF position. | [ P1850 SOLENOID CURRENT ] |
| ABS SYSTEM [C1203] | Malfunction related to wheel sensor has been detected by ABS actuator and electric unit (control unit). | [ C1203 ABS SYSTEM ] |
| CAN COMM CIRCUIT [U1000] | Malfunction has been detected from CAN communication line. | [ U1000 CAN COMM CIRCUIT ] |
| NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED. | No malfunction has been detected. |
ITEM DIAGNOSTIC CHART
| CAUTION | If "CAN COMM CIRCUIT [U1000]" is displayed with other DTCs, first perform the trouble diagnosis for CAN communication line. |