DESCRIPTION
When the A.D.D. actuator switches between 2WD and 4WD, the DL1 and DL2 terminals of the limit switch and ADD terminal of the A.D.D. position switch change to one of the following ON/OFF combinations listed in the table below.
Terminal |
In 2WD |
Switching between 2WD and 4WD |
In 4WD |
|
---|---|---|---|---|
DL1 |
ON (GND) |
ON (GND) |
OFF (OPEN) |
|
DL2 |
OFF (OPEN) |
ON (GND) |
ON (GND) |
|
ADD |
OFF (OPEN) |
OFF (OPEN) |
ON (GND) |
ON (GND) |
A malfunction is detected depending on the combination of the 3 circuits that make up the limit switch and A.D.D. position switch.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
P17A4 |
Automatic Disconnecting Differential Motor Limit Switch Circuit |
|
|
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY) |
(a) Disconnect the F13 4 wheel drive control ECU connector.
(b) Disconnect the A3 A.D.D. actuator (differential vacuum actuator assembly) connector.
(c) for Hydraulic Brake Booster:
Disconnect the S1 skid control ECU (Master Cylinder Solenoid) connector.
for Vacuum Brake Booster:
Disconnect the S1 skid control ECU (brake actuator assembly) connector.
(d) for 2GR-FKS:
Disconnect the E13 ECM connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F13-8 (DL1) - A3-6 (DL1) |
Always |
Below 1 Ω |
F13-7 (DL2) - A3-5 (DL2) |
Always |
Below 1 Ω |
F13-2 (ADD) - A3-3 (ADD) |
Always |
Below 1 Ω |
A3-4 (GND) - Body ground |
Always |
Below 1 Ω |
F13-8 (DL1) or A3-6 (DL1) - Body ground |
Always |
10 kΩ or higher |
F13-7 (DL2) or A3-5 (DL2) - Body ground |
Always |
10 kΩ or higher |
F13-2 (ADD) or A3-3 (ADD) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
INSPECT DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY (LIMIT SWITCH AND A.D.D. POSITION SWITCH) |
(a) Disconnect the A.D.D. actuator (differential vacuum actuator assembly) connector. |
|
(b) for Hydraulic Brake Booster:
Disconnect the S1 skid control ECU (Master Cylinder Solenoid) connector.
for Vacuum Brake Booster:
Disconnect the S1 skid control ECU (brake actuator assembly) connector.
(c) for 2GR-FKS:
Disconnect the E13 ECM connector.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A3-6 (DL1) - Body ground |
Ignition switch ON |
10 to 14 V |
A3-5 (DL2) - Body ground |
Ignition switch ON |
10 to 14 V |
A3-3 (ADD) - Body ground |
Ignition switch ON |
10 to 14 V |
*a |
Front view of wire harness connector (to A.D.D. Actuator (Differential Vacuum Actuator Assembly)) |
OK | ![]() |
REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY |
NG | ![]() |
REPLACE 4 WHEEL DRIVE CONTROL ECU |
Air Outlet Damper Control Servo Motor Circuit (B1443/43)
DESCRIPTION
This No. 1 air conditioning radiator damper servo sub-assembly (for mode switching)
is controlled by the air conditioning amplifier assembly and moves the mode damper
to the desired position.
DTC No.
DTC Detection Condition
Trouble Area
...
Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) (C1277,...,C1416)
DESCRIPTION
Refer to DTCs C1401 and C1402 (See page ).
DTC Code
DTC Detection Condition
Trouble Area
C1277
C1278
Stored only during test mode.
Rear speed sensor RH/LH
Rear speed sensor rotor RH/LH (Rear ax ...
Calibration
CALIBRATION
1. DESCRIPTION
(a) After replacing the VSC relevant components or performing "Front wheel alignment
adjustment", clearing and reading the sensor calibration data are necessary.
(b) Follow the chart to perform calibration.
Replacing Parts
Necessary Op ...