DESCRIPTION
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
U1002 |
Power management control ECU cannot receive signals from all ECUs that have been memorized as those connected to the CAN No. 2 bus. |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
PROCEDURE
1. |
CHECK CAN NO. 2 BUS WIRE |
(a) Turn the ignition switch off.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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|
(c) Disconnect the cable from the negative (-) battery terminal.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Result |
---|---|---|---|
D69-1 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Below 6 kΩ: CANH +B short |
D69-2 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Below 6 kΩ: CANL +B short |
Result |
Proceed to |
---|---|
OK |
A |
Open in CAN main bus line |
B |
|
C |
A |
REPLACE POWER MANAGEMENT CONTROL ECU |
C |
GO TO STEP 4 |
|
2. |
CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (CAN NO. 3 J/C) |
(a) Disconnect the CAN No. 3 junction connector (D69). Text in Illustration
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|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D69-1 (CANH) - D69-2 (CANL) |
Ignition switch off |
108 to 132 Ω |
OK |
REPLACE CAN NO. 3 J/C |
|
3. |
CHECK FOR OPEN IN CAN NO. 2 BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU) |
(a) Reconnect the CAN No. 3 junction connector (D69).
(b) Disconnect the power management control ECU connector (D43). Text in Illustration
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|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D43-26 (CA2H) - D43-25 (CA2L) |
Ignition switch off |
108 to 132 Ω |
OK |
REPLACE POWER MANAGEMENT CONTROL ECU |
NG |
REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - CAN NO. 3 J/C) |
4. |
CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CAN NO. 3 J/C) |
(a) Disconnect the CAN No. 3 junction connector (D69). |
|
*1 |
Rear view of wire harness connector (to CAN No. 3 Junction Connector) |
*2 |
Earth Terminal |
*3 |
DLC3 |
*4 |
Red |
*5 |
White |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D69-1 (CANH) - D69-2 (CANL) |
Ignition switch off |
108 to 132 Ω |
Inspection for open or short circuit between bus line |
D69-1 (CANH) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D69-2 (CANL) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D69-1 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D69-2 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
NG |
GO TO STEP 9 |
|
5. |
CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (AFS ECU) |
(a) Reconnect the CAN No. 3 junction connector (D69).
(b) Disconnect the AFS ECU connector.
Text in Illustration
*1 |
Front view of wire harness connector (to AFS ECU) |
*2 |
DLC3 |
(c) Measure the resistance of the wire harness side connectors.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D44-12 (CANH) - D44-13 (CANL) |
Ignition switch off |
54 to 69 Ω |
Inspection for open or short circuit between bus line |
D44-12 (CANH) - D44-22 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D44-13 (CANL) - D44-22 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D44-12 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D44-13 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
OK |
REPLACE AFS ECU |
|
6. |
CHECK CAN NO. 2 BUS BRANCH WIRE (AFS ECU) |
(a) Disconnect the CAN No. 3 junction connector (D70). Text in Illustration
|
|
(b) Measure the resistance of the wire harness side connectors.
Text in Illustration
*1 |
Front view of wire harness connector (to AFS ECU) |
*2 |
DLC3 |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D44-12 (CANH) - D44-13 (CANL) |
Ignition switch off |
1 MΩ or higher |
Inspection for open or short circuit between bus line |
D44-12 (CANH) - D44-22 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D44-13 (CANL) - D44-22 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D44-12 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D44-13 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
NG |
REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (AFS ECU - CAN NO. 3 J/C) |
|
7. |
CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY) |
(a) Disconnect the clearance warning ECU assembly connector.
Text in Illustration
*1 |
Front view of wire harness connector (to Clearance Warning ECU Assembly) |
*2 |
DLC3 |
(b) Measure the resistance of the wire harness side connectors.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D79-17 (R1) - D79-18 (R2) |
Ignition switch off |
54 to 69 Ω |
Inspection for open or short circuit between bus line |
D79-17 (R1) - D79-30 (E) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D79-18 (R2) - D79-30 (E) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D79-17 (R1) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D79-18 (R2) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
OK |
REPLACE CLEARANCE WARNING ECU ASSEMBLY |
|
8. |
CHECK CAN NO. 2 BUS BRANCH WIRE (CLEARANCE WARNING ECU ASSEMBLY) |
(a) Disconnect the CAN No. 3 junction connector (D81). Text in Illustration
|
|
(b) Measure the resistance of the wire harness side connectors.
Text in Illustration
*1 |
Front view of wire harness connector (to Clearance Warning ECU Assembly) |
*2 |
DLC3 |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D79-17 (R1) - D79-18 (R2) |
Ignition switch off |
1 MΩ or higher |
Inspection for open or short circuit between bus line |
D79-17 (R1) - D79-30 (E) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D79-18 (R2) - D79-30 (E) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D79-17 (R1) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D79-18 (R2) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
OK |
REPLACE CAN NO. 3 J/C |
NG |
REPAIR OR REPLACE CAN NO. 2 BUS BRANCH WIRE OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - CAN NO. 3 J/C) |
9. |
CHECK FOR SHORT IN CAN NO. 2 BUS WIRE (POWER MANAGEMENT CONTROL ECU) |
(a) Reconnect the CAN No. 3 junction connector (D69).
(b) Disconnect the power management control ECU connector. Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D43-26 (CA2H) - D43-25 (CA2L) |
Ignition switch off |
108 to 132 Ω |
Inspection for open or short circuit between bus line |
D43-26 (CA2H) - D43-6 (GND) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D43-25 (CA2L) - D43-6 (GND) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D43-26 (CA2H) - D43-1 (AM22) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D43-25 (CA2L) - D43-1 (AM22) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
HINT:
It is only necessary to perform the inspection in the above table for the result (open or short circuit) that was obtained in the Check CAN No. 2 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN No. 2 Bus Wire inspection.
OK |
REPLACE POWER MANAGEMENT CONTROL ECU |
NG |
REPAIR OR REPLACE CAN NO. 2 BUS MAIN WIRE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - CAN NO. 3 J/C) |
Components
COMPONENTS
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
ILLUSTRATION
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Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Audio and Visual System
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Detection Item
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If your vehicle needs to be towed
If towing is necessary, we recommend having your vehicle towed by your Toyota
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Use a safety chain system for all towing, and abide by all state/provincial and
local laws.
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