Lost Communication With Gateway Module (Power MANAGEMENT2)
NETWORKING: CAN COMMUNICATION SYSTEM: U1002: Lost Communication with Gateway Module (Power Management2)
U1002 - Lost Communication with Gateway Module (Power Management2)
DESCRIPTION
* The power management control ECU stores this DTC when no signals can be received from the ECUs that are memorized as those connected to the power management bus.
* When the power management control ECU receives a response signal from the ECUs connected to the power management bus, the power management ECU recognizes and memorizes that the ECU is connected to the power management bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the power management bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that are memorized as those connected to the power management bus, the power management control ECU determines that a malfunction exists.
* If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).
HINT
For vehicles with a smart key system only.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and 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 Repair Instruction - Initialization.
NEXT -- Continue to next step.
2. CHECK FOR 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
C -- CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND GROUND)
B -- CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
A -- Continue to next step.
3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - ECM)
(a) Disconnect the F83 No. 3 junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR
5. CONNECT CONNECTOR
(a) Reconnect the F83 No. 3 junction connector connector.
NEXT -- Continue to next step.
6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 3 JUNCTION CONNECTOR)
(a) Disconnect the F50 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 3 JUNCTION CONNECTOR)
OK -- REPLACE ECM Removal
7. CONNECT CONNECTOR
(a) Reconnect the F83 No. 3 junction connector connector.
NEXT -- Continue to next step.
8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU - NO. 3 JUNCTION CONNECTOR)
(a) Disconnect the F80 power management control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (POWER MANAGEMENT CONTROL ECU - NO. 3 JUNCTION CONNECTOR)
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
9. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)
(a) Disconnect the F83 No. 3 junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
10. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - ECM)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
11. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR
12. CONNECT CONNECTOR
(a) Reconnect the F83 No. 3 junction connector connector.
NEXT -- Continue to next step.
13. CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)
(a) Disconnect the F42 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE OR CONNECTOR (CANH, CANL)
OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal
14. CONNECT CONNECTOR
(a) Reconnect the F83 No. 3 junction connector connector.
NEXT -- Continue to next step.
15. CHECK FOR SHORT IN CAN BUS WIRES (ECM)
(a) Disconnect the F50 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE ECM MAIN WIRE OR CONNECTOR (CANP, CANN)
OK -- REPLACE ECM Removal
16. CONNECT CONNECTOR
(a) Reconnect the F83 No. 3 junction connector connector.
NEXT -- Continue to next step.
17. CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU)
(a) Disconnect the F80 power management control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE POWER MANAGEMENT CONTROL ECU MAIN WIRE OR CONNECTOR (CA3P, CA3N)
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
18. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND GROUND)
(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 Repair Instruction - Initialization.
(b) Disconnect the F80 power management control ECU 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:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal