DTC Troubleshooting: U0423 (184-8)

DTC U0423: F-CAN Malfunction (Gauge Control Module) NOTE: If the DTC U0122 and U0423 is stored at the same time as DTC U0073, troubleshooting DTC U0073 first, then recheck for DTC U0122 and U0423.

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. Turn the ignition switch OFF.

1. Turn the ignition switch ON (II).

1. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0423 indicated?

YES | - | Go to Step 6 .
NO | - | Intermittent failure, system is OK at this time.■

1. Check for meter of following items.
   - Speedometer, tachometer, fuel gauge and coolant temperature gauge not operates.
   - MIL stay off.
   - VSA warning light and brake warning light stay on both.

Is it the above-mentioned symptoms?

YES | - | Go to Step 7 .
NO | - | Check the gauge control module DTCs. ■

1. Turn the ignition switch OFF.

1. Disconnect ECM connector No. 2 (58P).

1. Disconnect the gauge control module 36P connector.

1. Check for continuity between gauge control module 36P conector terminal No. 1 and ECM connector No. 2 terminal No. 47, and gauge control module 36P connector terminal No. 19 * and ECM connector No. 2 terminal No. 48 * individually.

| *: | CANL line

Is there continuity?

YES | - | Check for poor connections or loose terminals at the gauge control module, then recheck. If DTC U0423 is indicated, substitute a known-good gauge control module, then recheck. If DTC U0423 is not indicated, replace the original gauge control module .■
NO | - | Repair open in the wire between gauge control module 36P connector terminal No. 23 (No. 24) * and ECM connector No. 2 terminal No. 47 (No. 48) * , then go to Step 11 .

1. Reconnect all connectors.

1. Turn the ignition switch ON (II).

1. Reset the ECM with the HDS.

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC U0423 is indicated, check for poor connections or loose terminals at the gauge control module, and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■