DESCRIPTION
This DTC is output when a malfunction is detected in the 4 wheel drive control ECU internal circuit.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
P163B |
4WD ECU Malfunction |
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
4WD specification:
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL LOCK COIL) |
(a) Turn the ignition switch off.
(b) Disconnect the F12 4 wheel drive control ECU connector.
(c) Disconnect the D28 differential lock coil connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F12-1 (SL+) - D28-2 (SL+) |
Always |
Below 1 Ω |
F12-5 (SL-) - D28-1 (SL-) |
Always |
Below 1 Ω |
F12-1 (SL+) or D28-2 (SL+) - Body ground |
Always |
10 kΩ or higher |
F12-5 (SL-) or D28-1 (SL-) - Body ground |
Always |
10 kΩ or higher |
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F12-1 (SL+) or D28-2 (SL+) - Body ground |
Ignition switch ON |
Below 1 V |
F12-5 (SL-) or D28-1 (SL-) - Body ground |
Ignition switch ON |
Below 1 V |
NG | ![]() |
REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
2. |
INSPECT DIFFERENTIAL LOCK COIL |
(a) Turn the ignition switch off.
(b) Disconnect the D28 differential lock coil connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
1 (SL-) or 2 (SL+) - Body ground |
Ignition switch ON |
Below 1 V |
OK | ![]() |
REPLACE 4 WHEEL DRIVE CONTROL ECU |
NG | ![]() |
REPLACE DIFFERENTIAL LOCK COIL |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure listed to troubleshoot the differential
system (w/ Differential Lock).
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Check Bus 5 Line for Short to +B
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no
resistance exists between terminal 15 (CA5H) of the central gateway ECU (network
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central
gateway ECU (network gateway ECU) and ...
Disposal
DISPOSAL
CAUTION / NOTICE / HINT
CAUTION:
Before performing pre-disposal deployment of any SRS part, review and closely
follow all applicable environmental and hazardous material regulations. Pre-disposal
deployment may be considered hazardous material treatment.
PROCEDURE
1. PRECAUTION
...