DTC B1E1D[49] ACC Relay Internal Circuit Failure (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. 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 Inspection for open circuit and short circuit in ACC relay control circuit.

Replace the ACC relay.

=>Go to Repair verification.

3. Inspection for open circuit and short circuit in ACC relay control circuit

1) Inspect the control circuit between the wireless access module (pin 6 of B14) and the ACC relay (pin 10 of B1) for the following. Is the result normal?

Open circuit
High resistance
Short to the power supply circuit
Short to ground circuit

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 harness connector inspection.

Repair the circuit as necessary.

=>Go to Repair verification.

4. Wireless access module harness connector inspection

1) Inspect for poor connections at the wireless access module harness connector (pin 6 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.

Repair the connections as necessary.

=>Go to Repair verification.

5. Wireless access module replacement

Note

After replacing the wireless access module, programming must be performed.

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.

6. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.