Honda Civic. Manual — part 155

Fig. 3: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

If the D indicator or the malfunction indicator lamp (MIL) has been reported on, or
if a driveability problem is suspected, do this:

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 (see DLC
CIRCUIT TROUBLESHOOTING ).

3. Select A/T system, and observe the DTC in the DTCs MENU on the HDS

screen.

4. Record the freeze data and on-board snapshots for 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 and data.
7. Drive the vehicle for several minutes under the same conditions as those

indicated by the freeze data, and then recheck for a DTC. 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.

Symptom Troubleshooting Versus DTC Troubleshooting

Some symptoms will not trigger diagnostic trouble codes (DTCs) or cause the D
indicator to blink. If the malfunction indicator lamp (MIL) was reported on or the D
indicator has been blinking, check for DTCs. If the vehicle has an abnormal
symptom, and there are no DTCs stored, do the symptom troubleshooting. Check
the list of probable cause(s) for the symptom, in the sequence listed, until you find
the problem.

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 P-

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

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

Fig. 4: Identifying D Indicator
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

Fig. 5: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

code.

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

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 DLC CIRCUIT TROUBLESHOOTING . .

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.

Fig. 6: D Indicator - Blinking Pattern
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 and data.
7. Drive the vehicle for several minutes under the same conditions as those

indicated by the freeze data, 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.

How to Troubleshoot Circuits at the PCM Connectors

NOTE:

The PCM overwrites data and monitors the EVAP system
for up to 15 minutes after the ignition switch is turned to

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

1. Jump the SCS line with the HDS.
2. Remove the PCM cover (A).

Fig. 7: Identifying PCM Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove the mounting bolts, disconnect the PCM connectors, and probe the

terminals in the inspection port on the terminal side of the connectors.

LOCK (0). Jumping the SCS line after turning the ignition
switch to LOCK (0) cancels this function. Disconnecting the
PCM during this function, without jumping the SCS line
first, can damage the PCM.

NOTE:

PCM connectors A, B, and C have symbols (A=[], B=
triangle symbol , C=o) embossed on them for
identification.

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)