DTC 1600 and 1601 Code Description

SOURCE:
Honda Service News April 2003

TITLE:
Reading IMA DTC's

APPLIES TO:
2000-03 Insight, 2003 Civic Hybrid

SERVICE TIP:
You could run across either a DTC 1600 (IMA system malfunction, MIL on) or DTC 1601 (IMA system malfunction, MIL off). These are generic DTCs on the PGM-FI side of the ECM/ PCM that let you know an IMA-related DTC is set. DTC P1600 and P1601 don't describe the problem or help you in the diagnosis; they just tell you there's an IMA system malfunction. To retrieve IMA DTCs, use the Honda Diagnostic System (HDS):

1. Connect the HDS to the 16P data link connector (DLC). Turn the ignition switch to ON (II), and turn on the HDS.

2. At the screen prompts, enter the VIN and the odometer reading, and then verify the correct date and time.

3. From the Select Mode screen, select the F12 key in the upper right corner to get the Set-up Details screen.

4. From the Set-up Details screen, select DTC Display. From the drop-down window, select either Honda (Insight models) or SAE (Civic Hybrid models).

5. From the System Selection Menu screen, select IMA.

6. From the Mode Menu screen, select DTCs.

7. From the Permanent DTCs screen, read the IMA DTC(s) that are set. Refer to ISIS or the IMA section in the appropriate S/M for specific troubleshooting details.