DTC B2274 Acc Relay Control Circuit
DTC DETECTING CONDITION:
When malfunction is detected in ACC relay drive circuit in the Keyless Access Control Module or external circuit.
TROUBLE SYMPTOM:
Each function does not operate at the ACC position.
CAUTION:
For replacement procedure of Keyless Access Control Module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
WIRING DIAGRAM:
Push button start system <Ref. to WIRING DIAGRAM , Push Button Start System.>
- Engine type: FA
- Engine type: EJ
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK LAN SYSTEM. Inspect LAN system. <Ref. to PROCEDURE , Basic Diagnostic Procedure.> |
Is the check result OK? | Go to step 2 . | Perform the inspection according to the diagnosis for LAN system. |
| 2 CHECK FUSE. Check the fuse. <Ref. to Relay and Fuse .> |
Is the check result OK? | Go to step 3 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
3 CHECK HARNESS.
Connector & terminal (B572) No. 2 (+) - Chassis ground (-): |
Is the voltage 9.5 - 16 V? | Go to step 4 . | Check the power supply circuit. |
| 4 CHECK HARNESS (OPEN CIRCUIT). Using a tester, measure the resistance between the Keyless Access Control Module connector and chassis ground. Connector & terminal (B572) No. 11 - Chassis ground: |
Is the resistance less than 1 Ω? | Go to step 5 . | Repair or replace the open circuit of harness. |
5 CHECK HARNESS.
Connector & terminal (B574) No. 4 - Chassis ground: |
Is resistance 152.61 - 216.5 Ω? (20°C) | Go to step 7 . | Go to step 6 . |
| 6 CHECK RELAY. Perform inspection of ACC relay unit. <Ref. to Accessory Relay (Push Button Start) .> |
Is the check result OK? | Go to step 7 . | Replace the relay. |
| 7 CHECK HARNESS (OPEN CIRCUIT). Using a tester, measure the resistance between the Keyless Access Control Module connector and the accessory relay (push button start), and between the accessory relay (push button start) and chassis ground. Connector & terminal (B574) No. 4 - (B426) No. 1: (B426) No. 2 - Chassis ground: |
Is the resistance less than 1 Ω? | Go to step 8 . | Repair or replace the open circuit of harness. |
8 CHECK Keyless Access Control Module.
Connector & terminal (B574) No. 4 (+) - Chassis ground (-): |
Is the voltage 1 V or less → 9.5 - 16 V when OFF → ACC ON? | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
|
Replace the Keyless Access Control Module. <Ref. to Keyless Access Control Module .> |