U1205 Honda Code - IMA-CAN Malfunction Battery Condition Monitor Module-Motor Control Module
Quick Answer
The Integrated Motor Assist-Controller Area Network (IMA-CAN) uses two signal lines, IMACANH and IMACANL, and it receives and transmits multiple signals simultaneously to/from multiple control modules. Common causes include Faulty Motor Control Module (MCM) / Battery Condition Monitor (BCM), Motor Control Module (MCM) / Battery Condition Monitor (BCM) harness is open or shorted, Motor Control Module (MCM) / Battery Condition Monitor (BCM) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1205 Honda indicates IMA-CAN Malfunction Battery Condition Monitor Module-Motor Control Module.
- Common causes
- Common causes include Faulty Motor Control Module (MCM) / Battery Condition Monitor (BCM), Motor Control Module (MCM) / Battery Condition Monitor (BCM) harness is open or shorted, Motor Control Module (MCM) / Battery Condition Monitor (BCM) circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U1205 Honda Description
When the information is not sent from the Motor Control Module (MCM) through the IMA-CAN and this condition continues for a specified time or when the information sent from the MCM is abnormal and this condition continues for a specified cycle, the Battery Condition Monitor (BCM) module detects a malfunction and when BUS-OFF is not detected after the time to detect BUS-OFF has passed, a DTC is stored.
What are the Possible Causes of the DTC U1205 Honda?
- Faulty Motor Control Module (MCM) / Battery Condition Monitor (BCM)
- Motor Control Module (MCM) / Battery Condition Monitor (BCM) harness is open or shorted
- Motor Control Module (MCM) / Battery Condition Monitor (BCM) circuit poor electrical connection
How to Fix the DTC U1205 Honda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
Do you have a vehicle with DTC U0110 (F-CAN malfunction [BCM module-MCM]) and DTC U1205 (IMA-CAN malfunction [BCM module-MCM]) set along with a blown No. 61 (10 A) IMA fuse in the auxiliary under-hood fuse/relay box? The culprit might be a bad IPU module fan.
To fix this problem, here's what you need to do:
- Replace the blown No. 61 (10 A) IMA fuse.
- Hook up the HDS and turn the ignition to ON.
- Do the IPU module fan drive test. In this test, the HDS changes the speed of the IMA module fan. It goes from off, to low (over 850 rpm), to middle (over 2, 200 rpm), to high (over 2,580 rpm).
--From the System Selection Menu, select IMA.
--From the Mode Menu, select Function Test.
--From the Function Test Menu, select IPU MODULE FAN DRIVE TEST. If the No. 61 fuse blows while this test is running, replace the IPU module fan, then clear the DTCs. If the fuse doesn't blow, see the DTC troubleshooting procedures in the electronic service manual.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1205 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U1205 Honda Code
1. What are the common symptoms of OBDII code U1205 in a Honda related to the IMA-CAN Malfunction Battery Condition Monitor Module-Motor Control Module?
- Common symptoms include the illumination of the check engine light, poor fuel efficiency, and reduced performance of the hybrid system.
2. What are some possible causes of U1205 code in a Honda's IMA-CAN system?
- Possible causes include a faulty Battery Condition Monitor Module, issues with the Motor Control Module, damaged wiring or connectors, or problems with the Controller Area Network (CAN) communication.
3. How can I diagnose the U1205 code in my Honda related to the IMA-CAN system?
- Diagnosing the U1205 code typically involves using a diagnostic scanner to retrieve the specific fault code, checking the condition of the Battery Condition Monitor Module and Motor Control Module, inspecting wiring and connectors for damage, and testing the CAN communication network.
4. Is it safe to continue driving my Honda with the U1205 code related to the IMA-CAN system?
- It is not recommended to continue driving your Honda with the U1205 code illuminated, as it can lead to further damage to the hybrid system components. It's best to have the issue diagnosed and repaired as soon as possible.
5. Can I repair the U1205 code issue in my Honda related to the IMA-CAN system myself?
- While some basic troubleshooting steps can be taken, diagnosing and repairing the U1205 code related to the IMA-CAN system often requires specialized knowledge and tools. It's advisable to seek assistance from a qualified automotive technician or dealership.
6. How much does it typically cost to repair the U1205 code in a Honda's IMA-CAN system?
- The cost of repairing the U1205 code can vary depending on the specific cause of the issue. It's recommended to obtain a diagnostic assessment from a professional technician to determine the exact repair cost.
7. Can a weak or failing hybrid battery cause the U1205 code to appear in a Honda?
- Yes, a weak or failing hybrid battery can potentially trigger the U1205 code related to the IMA-CAN system in a Honda. It's important to have the hybrid battery system checked if suspected.
8. Will resetting the check engine light make the U1205 code disappear permanently in a Honda?
- Simply resetting the check engine light will not permanently resolve the underlying issue causing the U1205 code. It's crucial to diagnose and address the root cause of the problem to prevent the code from reappearing.
9. Are there any preventive maintenance tips to avoid encountering the U1205 code in a Honda with IMA-CAN system?
- Regular maintenance of the hybrid system components, such as the Battery Condition Monitor Module and Motor Control Module, can help prevent issues leading to the U1205 code. Additionally, keeping up with scheduled maintenance can help avoid potential problems.
10. How long does it typically take to repair the U1205 code related to the IMA-CAN system in a Honda?
- The repair time for the U1205 code can vary depending on the complexity of the issue and availability of parts. It's advisable to consult with a technician for an estimate of the repair timeline.
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