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 |
Automatic High Beam System (B124B)
DESCRIPTION
The main body ECU (multiplex network body ECU) determines the status of the automatic
high beam system based on the automatic high beam system signal from the forward
recognition camera.
DTC No.
Detection Item
DTC Detection Condition
Trou ...
Washer Nozzle
Components
COMPONENTS
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT WASHER NOZZLE SUB-ASSEMBLY
(a) Operate the washer nozzle sub-assembly and check the position that the washer
fluid hits the windshield.
Standard:
Washer fluid hits the windshield gla ...
Lost Communication with Brake System Control Module (U0129/29)
DESCRIPTION
The tire pressure warning ECU and receiver receives signals from the skid control
ECU (brake actuator assembly) via the CAN communication system.
DTC No.
DTC Detection Condition
Trouble Area
U0129/29
Lost communication with ...