Honda 2004 Odyssey Service Manual page 1300

TCS Self-diagnosis
• The ABS/TCS control unit is equipped with a main CPU and a sub-CPU. Each CPU checks the other for problems.
• The CPUs check the circuit of the system.
• Self-diagnosis can be classified into two categories:
– Initial diagnosis: Done right after the engine starts and until the ABS or TCS indicator goes off
– Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned OFF
• When a problem is detected by self-diagnosis, the ABS/TCS control unit shifts to fail-safe mode.
TCS Self-diagnosis Table
Diagnostic
Trouble Code
(DTC)
24 27 TCS solenoid (short to body ground/short to
wire)
28 TCS relay
31 Engine retard command (PFINH) signal (open/
short to body ground)
32 Engine speed (NEP) signal (open/short to body
ground)
34 Reference voltage (VREF) signal (open/short to
body ground)
36 Throttle position sensor output (THLOUT) signal
(open/short to body ground)
61 A/T shift position (ATSFTP) signal (open/short to
body ground)
81 Continuous TCS operation
Detection Item Detection Timing
Initial Regular
Diagnosis Diagnosis
Fail-safe Mode
S1
S1
A2
A2
A2
A2
A2
A2
(cont'd)
19-99