B1177
DTC B1177:IG1 Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF, then turn it ON (II).
4. Check for DTCs with the HDS.
Is DTC B1177 indicated?
YES - Go to step 9.
NO - Go to step 5.
5. Clear the DTC with the HDS.
6. Turn the ignition switch OFF.
7. Start the engine.
8. Check for DTCs with the HDS.
Is DTC B1177 indicated?
YES - Go to step 9.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge assembly.
9. Check the battery condition.
Is the battery normal?
YES - Go to step 10.
NO - Charge the battery, or replace it.
10. Turn the ignition switch ON (II).
11. With the connectors connected, measure the voltage between gauge assembly connector A (22P) No. 9 terminal and body ground.
Is there battery voltage?
YES - Replace the gauge assembly.
NO - Increase of circuit resistance; check the IG1 circuit between the ignition switch and the gauge assembly.