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 power management bus. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
PROCEDURE
1. |
CHECK CAN BUS WIRE |
(a) Turn the ignition switch off.
(b) Measure the resistance according to the value(s) in the table below. Text in Illustration
Standard Resistance:
|
|
(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 |
---|---|---|---|
D43-12 (CA3P) - D43-1 (AM22) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Below 6 kΩ: CANH +B short |
D43-11 (CA3N) - D43-1 (AM22) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Below 6 kΩ: CANL +B short |
Result |
Proceed to |
---|---|
OK |
A |
Open circuit in CAN main bus wire |
B |
Short circuit between bus wires |
C |
|
D |
A | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
C | ![]() |
GO TO STEP 5 |
D | ![]() |
GO TO STEP 9 |
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU) |
(a) Disconnect the power management control ECU connector. Text in Illustration
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D43-12 (CA3P) - D43-11 (CA3N) |
Ignition switch off |
108 to 132 Ω |
OK | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
|
3. |
CHECK FOR OPEN IN CAN BUS WIRE (ECM) |
(a) Reconnect the power management control ECU connector.
(b) Disconnect the ECM connector. Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A49-12 (CANP) - A49-4 (CANN)*1 |
Ignition switch off |
108 to 132 Ω |
A41-8 (CANP) - A41-9 (CANN)*2 |
Ignition switch off |
108 to 132 Ω |
*1: for 1AR-FE
*2: for 2GR-FE
Result |
Proceed to |
---|---|
OK (for 1AR-FE) |
A |
OK (for 2GR-FE) |
B |
NG |
C |
A | ![]() |
REPLACE ECM |
B | ![]() |
REPLACE ECM |
|
4. |
CHECK FOR OPEN IN CAN BUS WIRE (CAN NO. 1 J/C MAIN WIRE) |
(a) Reconnect the ECM connector.
(b) Disconnect the CAN No. 1 junction connector (D56).
(c) Disconnect the CAN No. 1 junction connector (A44). Text in Illustration
|
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D56-4 (CANH) - D56-15 (CANL) |
Ignition switch off |
108 to 132 Ω |
D56-3 (CANH) - D56-14 (CANL) |
Ignition switch off |
200 Ω or higher |
A44-8 (CANH) - A44-19 (CANL) |
Ignition switch off |
108 to 132 Ω |
Result |
Proceed to |
---|---|
OK |
A |
NG (to ECM main wire) |
B |
NG (to Power management ECU main wire) |
C |
A | ![]() |
REPLACE CAN NO. 1 J/C |
B | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
C | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU) |
5. |
CHECK FOR SHORT IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU) |
(a) Disconnect the power management control ECU connector. Text in Illustration
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D43-12 (CA3P) - D43-11 (CA3N) |
Ignition switch off |
108 to 132 Ω |
OK | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
|
6. |
CHECK FOR SHORT IN CAN BUS WIRES (ECM) |
(a) Reconnect the power management control ECU connector.
(b) Disconnect the ECM connector. Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A49-12 (CANP) - A49-4 (CANN)*1 |
Ignition switch off |
108 to 132 Ω |
A41-8 (CANP) - A41-9 (CANN)*2 |
Ignition switch off |
108 to 132 Ω |
*1: for 1AR-FE
*2: for 2GR-FE
Result |
Proceed to |
---|---|
OK (for 1AR-FE) |
A |
OK (for 2GR-FE) |
B |
NG |
C |
A | ![]() |
REPLACE ECM |
B | ![]() |
REPLACE ECM |
|
7. |
CHECK FOR SHORT IN CAN BUS MAIN WIRE (CAN NO. 1 J/C MAIN WIRE) |
(a) Reconnect the ECM connector.
(b) Disconnect the CAN No. 1 junction connector (D56).
(c) Disconnect the CAN No. 1 junction connector (A44). Text in Illustration
|
|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D56-4 (CANH) - D56-15 (CANL) |
Ignition switch off |
108 to 132 Ω |
D56-3 (CANH) - D56-14 (CANL) |
Ignition switch off |
200 Ω or higher |
A44-8 (CANH) - A44-19 (CANL) |
Ignition switch off |
108 to 132 Ω |
Result |
Proceed to |
---|---|
OK |
A |
NG (to ECM main wire) |
B |
NG (to Power management ECU main wire) |
C |
NG (to Air conditioning amplifier branch wire) |
D |
A | ![]() |
REPLACE CAN NO. 1 J/C |
B | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
C | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU) |
|
8. |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER) |
(a) Disconnect the air conditioning amplifier connector.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE AIR CONDITIONING AMPLIFIER |
NG | ![]() |
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER) |
9. |
CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU) |
(a) Disconnect the power management control ECU connector. Text in Illustration
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
D43-12 (CA3P) - D43-6 (GND) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
D43-11 (CA3N) - D43-6 (GND) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
D43-12 (CA3P) - D43-1 (AM22) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
D43-11 (CA3N) - 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 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.
OK | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
|
10. |
CHECK FOR SHORT IN CAN BUS WIRES (ECM) |
(a) for 1AR-FE
(1) Disconnect the ECM connectors.
*1 |
Front view of wire harness connector (to ECM) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
A49-12 (CANP) - B58-104 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
A49-4 (CANN) - B58-104 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
A49-12 (CANP) - A49-20 (BATT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
A49-4 (CANN) - A49-20 (BATT) |
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 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.
(b) for 2GR-FE
(1) Disconnect the ECM connectors.
*1 |
Front view of wire harness connector (to ECM) |
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
---|---|---|---|
A41-8 (CANP) - B39-81 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
A41-9 (CANN) - B39-81 (E1) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
A41-8 (CANP) - A41-1 (BATT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
A41-9 (CANN) - A41-1 (BATT) |
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 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.
Result |
Proceed to |
---|---|
OK (for 1AR-FE) |
A |
OK (for 2GR-FE) |
B |
NG |
C |
A | ![]() |
REPLACE ECM |
B | ![]() |
REPLACE ECM |
|
11. |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C MAIN WIRE) |
(a) Disconnect the CAN No. 1 junction connector (D56).
(b) Disconnect the CAN No. 1 junction connector (A44). Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Purpose |
Connected to |
---|---|---|---|---|
D56-4 (CANH) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
Power management control ECU |
D56-15 (CANL) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
|
D56-4 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
|
D56-15 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
|
D56-3 (CANH) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
Air conditioning amplifier |
D56-14 (CANL) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
|
D56-3 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
|
D56-14 (CANL) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANL +B short |
|
A44-8 (CANH) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANH ground short |
ECM |
A44-19 (CANL) - D1-4 (CG) |
Ignition switch off |
200 Ω or higher |
Inspection for CANL ground short |
|
A44-8 (CANH) - D1-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Inspection for CANH +B short |
|
A44-19 (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 Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection.
Result |
Proceed to |
---|---|
OK |
A |
NG (to ECM main wire) |
B |
NG (to Power management control ECU main wire) |
C |
NG (to Air conditioning amplifier branch wire) |
D |
A | ![]() |
REPLACE CAN NO. 1 J/C |
B | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
C | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - POWER MANAGEMENT CONTROL ECU) |
|
12. |
CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER) |
(a) Disconnect the air conditioning amplifier connector.
(b) Measure the resistance according to the value(s) in the table below. Text in Illustration
Standard Resistance:
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 Bus Wire inspection. Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN Bus Wire inspection. |
|
OK | ![]() |
REPLACE AIR CONDITIONING AMPLIFIER |
NG | ![]() |
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - AIR CONDITIONING AMPLIFIER) |
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COMPONENTS
ILLUSTRATION
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REMOVAL
PROCEDURE
1. REMOVE UPPER INSTRUMENT PANEL
HINT:
Refer to the procedure up to Remove Upper Instrument Panel Sub-assembly (See
page ).
2. REMOVE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEM ...
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PROCEDURE
1.
CHECK VEHICLE SIGNAL (OPERATION CHECK)
(a) Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal
in Operation Check (See page ).
(b) Check that the display changes between ON ...
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DESCRIPTION
Changing from 1st to 6th is performed by the TCM turning shift solenoid valves
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...