Honda Accord 2008 Manual page 1412

07/11/02 09:29:32 61TA0000_180_0079
DTC 85: F-CAN Communication Failure
NOTE: Check the fuel and emission systems DTCs with
the HDS, and troubleshoot the ECM/PCM and F-CAN
communication errors first (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then turn the
ignition switch to ON (II) again.
4. Wait about 5 seconds.
5. Check for DTCs with the HDS.
Is DT C 85 indicated?
YES − Go to step 6.
−
NO The system is OK at this time. Check for loose
terminals and poor connections at the TPMS
control unit.
6. Test-drive the vehicle.
Does the speedometer work?
YES − Go to step 10.
NO − Go to step 7.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the TPMS control unit 20P connector.
9. Test-drive the vehicle.
Does the speedometer work?
YES − Check for loose terminals and poor
connections at the TPMS control unit. If necessary,
substitute a known-good TPMS control unit
(see page 18-85), and recheck.
NO − Turn the ignition switch to LOCK (0), and
reconnect all connectors, then check and
troubleshoot the fuel and emissions systems
(see page 11-3).
10. Turn the ignition switch to LOCK (0).
11. Short the SCS line with the HDS.
12. Disconnect ECM/PCM connector A (49P).
13. Disconnect the TPMS control unit 20P connector.
14. Check for continuity between the TPMS control unit
20P connector terminals and the ECM/PCM
connector A (49P) terminals individually (see table).
Terminal TPMS Control
Name Unit 20P
Connector
Terminal
CAN L No. 11
CAN H No. 1
TPMS CONTROL UNIT 20P CONNECTOR
Wire side of female terminals
CAN H (WHT)
CAN L (RED)
CAN H (WHT) CAN L (RED)
ECM/PCM CONNECTOR A (49P)
Terminal side of female terminals
Is there continuity?
YES − Check for loose terminals and poor
connections at the TPMS control unit and G503. If
necessary, substitute a known-good TPMS control
unit (see page 18-85), and recheck.
NO − Repair open in the wire between the TPMS
control unit and the ECM/PCM.
ＴＡ０８ＡＥ４Ｋ７９７０００８１８５０ＦＡＡＴ００
ECM/PCM
Connector A
(49P) Terminal
No. 4
No. 3
18-79
＊０１