DTC B1E1D[62] ACC Relay Response Signal Mismatch (Wireless Access Module (Hi-version [Passive Entry and Start System]))

1. Wireless access module system check

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Hi-version [Passive Entry and Start System])) Diagnostic system check-Wireless Access Module (Hi-version[Passive Entry and Start System])".

2. Prioritized DTC check

1) Turn ON the ignition switch.

2) Observe the DTC information with a scan tool. Is DTC B1E1D[49] set at the same time?

Yes

Go to DTC B1E1D[49] diagnosis.

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Hi-version [Passive Entry and Start System])) DTC B1E1D[49] ACC Relay Internal Circuit Failure".

No

=>Go to ACC relay inspection.

3. ACC relay inspection

1) Turn OFF the ignition switch.

2) Replace the ACC relay with a known good relay.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is a DTC set?

Yes

=>Go to ACC feedback signal input check.

No

Replace the ACC relay.

=>Go to Repair verification.

4. ACC feedback signal input check

1) Turn OFF the ignition switch.

2) Remove the ACC relay.

3) Turn ON the ignition switch.

4) Observe the Accessory Switch Input parameter on the scan tool. Does the Accessory Switch Input parameter show OFF?

Yes

=>Go to Inspection for open circuit in ACC relay ground circuit.

No

=>Go to Inspection for short to power supply in ACC feedback signal circuit.

5. Inspection for open circuit in ACC relay ground circuit

1) Connect a fused jumper wire to the ACC relay harness connector contact point side circuit (pin 1 of C1 and pin 5 of B4).

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.).

2) Observe the Accessory Switch Input parameter on the scan tool. Does the Accessory Switch Input parameter show ON?

Yes

Repair the open circuit or high resistance in the ground circuit between the ACC relay (pin 12 of B4) and the body ground.

=>Go to Repair verification.

No

=>Go to Inspection for open circuit in ACC relay circuit.

6. Inspection for short to power supply in ACC feedback signal circuit

1) Inspect the signal circuit between the wireless access module (pin 22 of B14) and the ACC relay (pin 5 of B4) for a short to the battery power supply circuit or a short to the ignition power supply circuit. 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

=>Go to Wireless access module replacement.

No

Repair the circuit as necessary.

=>Go to Repair verification.

7. Inspection for open circuit in ACC relay circuit

1) Inspect the JB MAIN 120A slow blow fuse. Is the result normal?

2) Inspect the power supply circuit between the JB MAIN 120A slow blow fuse and the ACC relay (pin 1 of C1) 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.).

3) Inspect the signal circuit between the wireless access module (pin 22 of B14) and the ACC relay (pin 5 of B4) 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.).

4) Are all of the results normal?

Yes

=>Go to Wireless access module harness connector inspection.

No

Repair as necessary.

=>Go to Repair verification.

8. Wireless access module harness connector inspection

1) Inspect for poor connections at the wireless access module harness connector (pin 22 of B14). 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

=>Go to Wireless access module replacement.

No

Repair the connections as necessary.

=>Go to Repair verification.

9. Wireless access module replacement

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".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module setting (with passive entry and start system)".

Procedure completion

=>Go to Repair verification.

10. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch and wait for 10 seconds.

4) Observe the DTC information with a scan tool.