- Power management bus circuit
- ECM main wire or connector
- Power management control ECU main wire or connector
- Air conditioning amplifier assembly branch wire or connector
- ECM
- Power management control ECU
- Air conditioning amplifier assembly
- No. 3 junction connector
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJEK |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM: U1002; Lost Communication with Gateway Module (Power Management2); 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
U1002 |
Lost Communication with Gateway Module (Power Management2) |
DESCRIPTION
|
DTC Code |
Symptom |
Trouble Area |
|---|---|---|
|
U1002 |
Lost Communication with Gateway Module (Power Management2). |
|
HINT:
For vehicle with smart key system only.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
- Turn the ignition switch off before inspecting CAN bus wires for a ground short.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT:
- Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
- Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
|
1. |
PRECAUTION |
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (See page
![2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION](/t3Portal/stylegraphics/info.gif)
).
|
|
2. |
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page
).
|
|
3. |
CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
Text in Illustration
Result
|
|
| B |
|
| C |
|
|
|
4. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - ECM) |
|
(a) Disconnect the No. 3 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D181-3 (CANP) - D181-14 (CANN) |
Ignition switch off |
108 to 132 Ω |
Text in Illustration
|
*a |
Rear view of wire harness connector (to No. 3 Junction Connector) |
| NG |
|
|
|
5. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
|
(a) Disconnect the No. 3 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D181-2 (CANH) - D181-13 (CANL) |
Ignition switch off |
108 to 132 Ω |
Text in Illustration
|
*a |
Rear view of wire harness connector (to No. 3 Junction Connector) |
| OK |
|
REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR |
| NG |
|
|
6. |
CONNECT CONNECTOR |
(a) Reconnect the D181 No. 3 junction connector.
|
|
7. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - ECM) |
|
(a) Disconnect the ECM connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A39-8 (CANP) - A39-9 (CANN) |
Ignition switch off |
108 to 132 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to ECM) |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - ECM) |
|
8. |
CONNECT CONNECTOR |
(a) Reconnect the D181 No. 3 junction connector.
|
|
9. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
|
(a) Disconnect the power management control ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D89-12 (CA3P) - D89-11 (CA3N) |
Ignition switch off |
108 to 132 Ω |
Text in Illustration
|
*a |
Front view of wire harness connector (to Power Management Control ECU) |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
|
10. |
CHECK FOR SHORT IN CAN BUS MAIN WIRES (NO. 3 JUNCTION CONNECTOR - ECM) |
|
(a) Disconnect the No. 3 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D181-3 (CANH) - D181-14 (CANL) |
Ignition switch off |
108 to 132 Ω |
|
D181-3 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-14 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-3 (CANH) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
D181-14 (CANL) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Rear view of wire harness connector (to No. 3 Junction Connector) |
|
*b |
Front view of DLC3 |
| NG |
|
|
|
11. |
CHECK FOR SHORT IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
|
(a) Disconnect the No. 3 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D181-2 (CANH) - D181-13 (CANL) |
Ignition switch off |
108 to 132 Ω |
|
D181-2 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-13 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-2 (CANH) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
D181-13 (CANL) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Rear view of wire harness connector (to No. 3 Junction Connector) |
|
*b |
Front view of DLC3 |
| NG |
|
|
|
12. |
CHECK FOR SHORT IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
|
(a) Disconnect the No. 3 junction connector connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D181-1 (CANH) - D181-12 (CANL) |
Ignition switch off |
200 Ω or higher |
|
D181-1 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-12 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D181-1 (CANH) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
D181-12 (CANL) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Rear view of wire harness connector (to No. 3 Junction Connector) |
|
*b |
Front view of DLC3 |
| OK |
|
REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR |
| NG |
|
|
13. |
CONNECT CONNECTOR |
(a) Reconnect the D181 No. 3 junction connector.
|
|
14. |
CHECK FOR SHORT IN CAN BUS MAIN WIRE (ECM) |
|
(a) Disconnect the ECM connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A39-8 (CANP) - A39-9 (CANN) |
Ignition switch off |
108 to 132 Ω |
|
A39-8 (CANP) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
A39-9 (CANN) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
A39-8 (CANP) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
A39-9 (CANN) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Front view of wire harness connector (to ECM) |
|
*b |
Front view of DLC3 |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - ECM) |
|
15. |
CONNECT CONNECTOR |
(a) Reconnect the D181 No. 3 CAN junction connector.
|
|
16. |
CHECK FOR SHORT IN CAN BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU) |
|
(a) Disconnect the power management control ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D89-12 (CA3P) - D89-11 (CA3N) |
Ignition switch off |
108 to 132 Ω |
|
D89-12 (CA3P) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D89-11 (CA3N) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D89-12 (CA3P) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
D89-11 (CA3N) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Front view of wire harness connector (to Power Management Control ECU) |
|
*b |
Front view of DLC3 |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU) |
|
17. |
CONNECT CONNECTOR |
(a) Reconnect the D181 No. 3 junction connector.
|
|
18. |
CHECK FOR SHORT IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY) |
|
(a) Disconnect the air conditioning amplifier assembly. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D75-11 (CANH) - D75-12 (CANL) |
Ignition switch off |
108 to 132 Ω |
|
D75-11 (CANH) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D75-12 (CANL) - D16-4 (CG) |
Ignition switch off |
200 Ω or higher |
|
D75-11 (CANH) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
|
D75-12 (CANL) - D16-16 (BAT) |
Ignition switch off |
6 kΩ or higher |
Text in Illustration
|
*a |
Front view of wire harness connector (to Air Conditioning Amplifier Assembly) |
|
*b |
Front view of DLC3 |
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
|
19. |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - POWER SOURCE) |
|
(a) Connect the cable to the negative (-) battery terminal. NOTICE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page
|
|
(b) Disconnect the power management control ECU.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D89-6 (GND) - Body ground |
Always |
Below 1 Ω |
|
D89-5 (GND2) - Body ground |
Always |
Below 1 Ω |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D89-2 (AM21) - Body ground |
Always |
11 to 14 V |
|
D89-1 (AM22) - Body ground |
Always |
11 to 14 V |
Text in Illustration
|
*a |
Front view of wire harness connector (to Power Management Control ECU) |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|