1) Connect the scan tool.
2) Power up the scan tool. Does the scan tool power up?
Yes
=>Go to Central gateway control unit communication verification.
No
Go to Scan tool does not power up.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Scan tool does not power up".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) Scan tool does not power up".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) Scan tool does not power up".
1) Verify communication with the central gateway control unit using the scan tool. Can communication with the central gateway control unit be established?
Yes
=>Go to Wireless access module communication verification.
No
Go to Lost communication with the central gateway control unit.
1) Verify that communication can be established with the wireless access module using the scan tool. Can communication with the wireless access module be established?
Yes
=>Go to Body CAN communication circuit communication verification.
No
=>Go to Wireless access module harness connector inspection.
1) Verify that communication can be established with the following control modules using a scan tool. Can communication with all the control modules be established?
Yes
The system is normal.
No
Go to Body CAN communication circuit inspection.
Refer to "64.Body Control 10I.Troubleshooting(Central GateWay) body CAN communication circuit inspection".
1) Inspect for poor connections at the wireless access module harness connector (pins 19 and 20 of B15). Is the connection status normal?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the connections as necessary.
1) Inspect the WAM (+B) 5A fuse. Is the result normal?
Yes
=>Go to Inspection for open circuit in battery power supply circuit.
No
Replace the fuse as necessary. If the fuse blows out again, repair the short to ground in the circuits relating to the fuse.
1) Turn OFF the ignition switch.
2) Disconnect the wireless access module harness connector (B14).
3) Connect a test lamp between the battery power supply circuit of the wireless access module harness connector (pin 1 of B14) and the body ground. Does the test lamp illuminate?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the open circuit or high resistance in the battery power supply circuit between the WAM(+B) 5A fuse and the wireless access module (pin 1 of B14).
1) Connect a test lamp between the battery power supply circuit and the ground circuit of the wireless access module harness connector (pins 1 and 32 of B14). Does the test lamp illuminate?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Inspection for open circuit and short circuit in CAN communication circuit.
No
=>Go to Inspection for open circuit in ground circuit.
1) Inspect the ground circuit between the wireless access module (pin 32 of B14) and the body ground for an open circuit or high resistance. Is the result normal?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Repair corrosion and tightening of the wireless access module ground terminals.
No
Repair the circuit as necessary.
1) Inspect the CAN Low circuit and CAN High circuit between the wireless access module (pins 19 and 20 of B15) and the DLC (pins 6 and 14 of C19) for the following. Is the result normal?
Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Wireless access module replacement.
No
Repair the circuit as necessary.
Note
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module removal".
Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module installation".
Procedure completion
1) Connect all of the removed fuses and harness connectors.
2) Turn OFF the ignition switch.
3) Any of the following is operated.
4) Verify that communication can be established with the wireless access module using the scan tool. Can communication with the wireless access module be established?
Yes
The system is normal.
No
=>Go to Wireless access module harness connector inspection.