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 |
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The procedure listed below is for the LH side.
PROCEDURE
1. REMOVE FRONT WHEEL
2. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY
3. SEPARATE FRONT STABILIZER LINK ASSEMBLY LH
...
Road Test
ROAD TEST
HINT:
'SET' and '-', 'RES' and '+', 'ON-OFF' functions share the same switch. Operate
the cruise control main switch according to the directions indicated on the switch.
1. INSPECT 'SET' FUNCTION
(a) Push the ON-OFF button on (A).
(b ...
ECU Power Source Circuit
DESCRIPTION
The IG circuit is the power source for the tire pressure warning ECU and receiver.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the tire pressure warning ECU and receiver, read the
transmitter IDs stored in the old ECU using the Techstream and write th ...