A/t System Troubleshooting & Testing: Other Honda CR-V IV

How to Check for DTCs with the SCS Mode (retrieving the flash codes)

Note. The preferred method is to use the HDS to retrieve the DTCs.

When the PCM senses an abnormality in the input or output system, the D indicator (A) in the gauge control module (B) will usually blink.

Scheme 145

When the D indicator has been reported on, connect the HDS to the DLC (A) located under the driver's side of the dashboard. Turn the ignition switch to ON (II), select SCS mode, then the D indicator will indicate (blink) the DTC.

Scheme 146

If the D indicator and the MIL come on at the same time, or if a driveability problem is suspected, follow this procedure

Scheme 147

1. Connect the HDS to the DLC. (See the HDS user's manual for specific instructions.)
2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, «GO TO THE DLC CIRCUIT TROUBLESHOOTING.»(ref-595375-S01818375202014013100000)
3. Select SCS mode, then observe the D indicator in the gauge control module. Codes 1 through 9 are indicated by individual short blinks. Code 10 and above are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the code.
4. Record all fuel and emissions DTCs and A/T DTCs.
5. If there is a fuel and emissions DTC, first check the fuel and emissions system as indicated by the DTC.
6. Clear the DTC.
7. If the freeze data is available, drive the vehicle for several minutes with periods of wide open throttle, steady cruise, and stop and go, and then recheck for DTCs. If the A/T DTC returns, go to the indicated DTC's troubleshooting. If the DTC does not return, there was an intermittent problem within the circuit. Make sure all pins and terminals in the circuit are tight.

OBD Status

The OBD STATUS shows the current system status of each DTC and all of the parameters. This function is used to see if the repair was successfully completed. The results of diagnostic tests for the DTC are displayed as

1. PASSED: The on-board diagnosis is successfully completed.
2. FAILED: The on-board diagnosis has completed but failed.
3. NOT COMPLETED: The on-board diagnosis was running but is out of the enable conditions of the DTC.

Failure Reproduction Technique

Note. Make sure to follow these points while the vehicle is raised on a lift for the test-drive.

1. Disable the VSA (if equipped) by pressing the VSA OFF button.
2. ABS or VSA DTC(s) may come on when test-driving on a lift. If the ABS or VSA DTC(s) come on, clear the DTC(s) with the HDS.

Self-Diagnosis

If the PCM detects the failure of a signal from a sensor, a switch, a solenoid valve, or from another control unit, it stores a Pending or Confirmed DTC. Depending on the failure, a DTC is stored in either the first or second drive cycle. When a Confirmed DTC is stored, the PCM blinks the D indicator and/or turns on the MIL by a signal sent to the gauge control module via F-CAN.

1. One Drive Cycle Detection Method: When an abnormality occurs in the signal from a sensor, a switch, a solenoid valve, or from another control unit, the PCM stores a Pending or Confirmed DTC for the failure and blinks the D indicator and/or turns on the MIL immediately.
2. Two Drive Cycle Detection Method: When an abnormality occurs in the signal from a sensor, a switch, a solenoid valve, or from another control unit in the first drive cycle, the PCM stores a Pending DTC. The D indicator and the MIL do not turn on at this time. If the failure continues in the second drive cycle, the PCM stores a Confirmed DTC and blinks the D indicator and/or turns on the MIL.

Fail-Safe Function

When an abnormality occurs in the signal from a sensor, a switch, a solenoid valve, or from another control unit, the PCM ignores that signal and substitutes a pre-programmed value for that signal to allow the automatic transmission to continue operating. This causes a DTC to be stored and the D indicator to blink and/or the MIL to come on. The transmission may not shift normally during fail-safe operation. Do not run the test-driving diagnosis when the MIL is ON, or the D indicator is blinking.