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 terminal 16 (BAT) of the DLC3.
Detection Item |
Trouble Area |
---|---|
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 terminal 16 (BAT) of the DLC3. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
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HINT:
PROCEDURE
1. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 6 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 6 CAN Junction Connector) |
*b |
to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
*c |
to Central Gateway ECU (Network Gateway ECU) |
*d |
to No. 5 CAN Junction Connector |
*e |
to Forward Recognition Camera (w/ Toyota Safety Sense P) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
J22-1 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Clearance warning ECU assembly*1 |
J22-12 (CANL) - D4-16 (BAT) |
|||
J22-2 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
J22-13 (CANL) - D4-16 (BAT) |
|||
J22-3 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 5 CAN junction connector |
J22-14 (CANL) - D4-16 (BAT) |
|||
J22-4 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Forward recognition camera*2 |
J22-15 (CANL) - D4-16 (BAT) |
Result |
Proceed to |
---|---|
OK |
A |
NG (Central gateway ECU (network gateway ECU) CAN main line) |
B |
NG (No. 5 CAN junction connector CAN main line) |
C |
NG (ECU or sensor CAN branch lines) |
D |
A |
REPLACE NO. 6 CAN JUNCTION CONNECTOR |
C |
GO TO STEP 3 |
D |
GO TO STEP 6 |
|
2. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the N36 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 6 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
J22-2 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
J22-13 (CANL) - D4-16 (BAT) |
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 5 CAN JUNCTION CONNECTOR) |
(a) Disconnect the No. 5 CAN junction connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 5 CAN Junction Connector) |
*b |
to Millimeter Wave Radar Sensor Assembly (w/ Toyota Safety Sense P) |
*c |
to No. 6 CAN Junction Connector |
*d |
to No. 4 CAN Junction Connector |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
J21-1 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Millimeter wave radar sensor assembly*1 |
J21-3 (CANL) - D4-16 (BAT) |
|||
J21-2 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 6 CAN junction connector |
J21-4 (CANL) - D4-16 (BAT) |
|||
J21-6 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 4 CAN junction connector |
J21-7 (CANL) - D4-16 (BAT) |
Result |
Proceed to |
---|---|
OK |
A |
NG (No. 4 CAN junction connector CAN main line) |
B |
NG (No. 6 CAN junction connector CAN main line) |
C |
NG (ECU or sensor CAN branch lines) |
D |
A |
REPLACE NO. 5 CAN JUNCTION CONNECTOR |
C |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR) |
D |
GO TO STEP 6 |
|
4. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR) |
(a) Disconnect the No. 4 CAN junction connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 4 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
*c |
to No. 5 CAN Junction Connector |
*d |
to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
J20-1 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
J20-3 (CANL) - D4-16 (BAT) |
|||
J20-2 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 5 CAN junction connector |
J20-4 (CANL) - D4-16 (BAT) |
|||
J20-6 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Blind spot monitor sensor LH*1 |
J20-7 (CANL) - D4-16 (BAT) |
Result |
Proceed to |
---|---|
OK |
A |
NG (Central gateway ECU (network gateway ECU) CAN main line) |
B |
NG (No. 5 CAN junction connector CAN main line) |
C |
NG (ECU or sensor CAN branch lines) |
D |
A |
REPLACE NO. 4 CAN JUNCTION CONNECTOR |
C |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR) |
D |
GO TO STEP 6 |
|
5. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the N36 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 4 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
J20-1 (CANH) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
J20-3 (CANL) - D4-16 (BAT) |
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
6. |
CHECK FOR SHORT TO B+ IN CAN BUS LINES (ECU, SENSOR) |
(a) Reconnect the CAN junction connector. |
|
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B is connected
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
N36-15 (CA5H) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
N36-16 (CA5L) - D4-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
HINT:
If the resistance changes to 6 kΩ or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
OK |
REPLACE ECU OR SENSOR |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Inspection
INSPECTION
PROCEDURE
1. INSPECT COUNTER GEAR
(a) Using a dial indicator and 2 V-blocks, measure the counter gear runout.
Maximum runout:
0.03 mm (0.00118 in.)
If the runout is more than the maximum, replace the counter gear.
HINT:
Measure the 3 areas shown in the illust ...
Driver Side Power Window Auto Up / Down Function does not Operate with Power
Window Master Switch
DESCRIPTION
If the manual up/down function can be performed but the auto up/down function
cannot, then the fail-safe mode may be functioning.
If the power window initialization (See page
) has not been performed, the auto up/down function will not operate.
WIRING DIAGRAM
CAUTION / NOTICE ...
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine ...