Honda 2004 Odyssey Service Manual page 337

Fuel and Emissions Systems
System Descriptions (cont'd)
PCM Inputs and Outputs at Connector A (31P) '01 Model
NOTE: Standard battery voltage is 12 V.
Terminal Wire color
number
1 WHT/YEL
2 YEL/BLK
3 YEL/BLK
4 BLK
5 BLK
6 WHT
9 RED/BLU
10 YEL
11 GRN
12 BLU
13 RED/WHT
14 RED/YEL
15 RED/BLK
16 WHT/BLK
19 WHT/RED
20 BLU/BLK
22 BLK
23 RED
24 WHT
25 BRN/BLK
26 BRN/BLK
27 RED/GRN
28 GRN/BLK
29 GRN/WHT
30 YEL/BLU
31 YEL/RED
11-28
Terminal name
VBU (VOLTAGE BACK UP)
IGP2 (POWER SOURCE)
IGP1 (POWER SOURCE)
PG2 (POWER GROUND)
PG1 (POWER GROUND)
PHO2S (PRIMARY HEATED
OXYGEN SENSOR (PRIMARY
HO2S) SENSOR 1)
KS (KNOCK SENSOR)
TDC2 (TOP DEAD CENTER
(TDC) 2 SENSOR SIDE)
TDC1 (TOP DEAD CENTER
(TDC) 1 SENSOR SIDE)
CKP (CRANKSHAFT
POSITION (CKP) SENSOR
SIDE)
ECT (ENGINE COOLANT
TEMPERATURE (ECT)
SENSOR)
IAT (INTAKE AIR
TEMPERATURE (IAT)
SENSOR)
TPS (THROTTLE POSITION
(TP) SENSOR)
EGRP (EXHAUST GAS
RECIRCULATION (EGR)
VALVE POSITION SENSOR)
ALTF (ALTERNATOR FR
SIGNAL)
VTPSW (VTEC OIL PRESSURE
SWITCH)
TDC2 (TOP DEAD CENTER
(TDC) SENSOR 2 SIDE)
TDC1 (TOP DEAD CENTER
(TDC) SENSOR 1 SIDE)
CKP (CRANKSHAFT
POSITION (CKP) SENSOR
SIDE)
LG2 (LOGIC GROUND)
LG1 (LOGIC GROUND)
MAP (MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR)
SG2 (SENSOR GROUND)
SG1 (SENSOR GROUND)
VCC2 (SENSOR VOLTAGE)
VCC1 (SENSOR VOLTAGE)
Wire side of female teminals
Description
Power source for the PCM Battery voltage at all times
circuit. Power source for the
DTC memory
Power source for the PCM With ignition switch ON (II): battery voltage
circuit With ignition switch OFF: about 0 V
Power source for the PCM With ignition switch ON (II): battery voltage
circuit With ignition switch OFF: about 0 V
Ground for the PCM circuit Less than 1.0 V at all times
Ground for the PCM circuit Less than 1.0 V at all times
Detects primary HO2S With throttle fully opened from idle and fully
(sensor 1) signal warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V
Detects knock sensor signal With engine knocking: pulses
Detects TDC sensor 2 With engine running: pulses
Detects TDC sensor 1 With engine running: pulses
Detects CKP sensor With engine running: pulses
Detects ECT sensor signal With ignition switch ON (II): about 0.1 4.8 V
(depending on engine coolant temperature)
Detects IAT sensor signal With ignition switch ON (II): about 0.1 4.8 V
(depending on intake air temperature)
Detects TP sensor signal With throttle fully open: about 4.8 V
With throttle fully closed: about 0.5 V
Detects EGR valve position At idle: about 1.2 V
sensor signal
Detects alternator FR signal With fully warmed up engine running:
0 V battery voltage (depending on electrical
load)
Detects VTEC oil pressure With engine at low engine speed: 0 V
switch signal With engine at high speed: battery voltage
Ground for TDC sensor 2
Ground for TDC sensor 1
Ground for CKP sensor
Ground for the PCM circuit Less than 1.0 V at all times
Ground for the PCM circuit Less than 1.0 V at all times
Detects MAP sensor signal With ignition switch ON (II): about 3 V
At idle: about 1.0 V
Sensor ground Less than 1.0 V at all times
Ground for MAP sensor Less than 1.0 V at all times
Provides sensor voltage With ignition switch ON (II): about 5 V
With ignition switch OFF: about 0 V
Power source to MAP With ignition switch ON (II): about 5 V
sensor With ignition switch OFF: about 0 V
Signal