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Honda Odyssey 2004. Manual - part 122

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DTC P1519

’01 Model:

YES

11-186

Idle Control System

DTC Troubleshooting (cont’d)

IAC VALVE 3P CONNECTOR

IGP (YEL/BLK)

IAC VALVE 3P CONNECTOR

GND (BLK)

PCM CONNECTOR B (24P)

IACV (BLK/BLU)

IAC Valve Circuit

Malfunction

1. Reset the PCM (see page 11-4).

2. Turn the ignition switch ON (II).

Go to step 3.

Intermittent failure, system is OK at this time.

Check for poor connections or loose terminals at
the IAC valve and at the PCM.

3. Turn the ignition switch OFF.

4. Disconnect the IAC valve 3P connector.

5. Turn the ignition switch ON (II).

6. Measure voltage between IAC valve 3P connector

terminal No. 2 and body ground.

Go to step 7.

Repair open in the wire between the IAC valve

and the PGM-FI main relay.

7. Turn the ignition switch OFF.

8. Check for continuity between body ground and IAC

valve 3P connector terminal No. 1.

Go to step 9.

Repair open in the wire between the IAC valve

and G101.

9. Disconnect PCM connector B (24P).

10. Check for continuity between body ground and

PCM connector terminal B23.

Repair short in the wire between the IAC

valve and the PCM (B23).

Go to step 11.

Wire side of female terminals

Is DT C P1519 indicated?

Is ther e batter y voltage?

Is ther e continuity?

03/07/29 09:23:05 61S0X050_110_0186

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11-187

IAC VALVE 3P CONNECTOR

JUMPER WIRE

IACV (BLK/RED)

PCM CONNECTOR B (24P)

IACV (BLK/BLU)

PCM CONNECTOR B (24P)

IACV (BLK/BLU)

11. Connect IAC valve 3P connector terminal No. 3 to

body ground with a jumper wire.

12. Check for continuity between PCM connector

terminal B23 and body ground.

Go to step 13.

Repair open in the wire between the IAC valve

and the PCM (B23).

13. Remove the jumper wire from the IAC valve 3P

connector, then reconnect the IAC valve 3P
connector.

14. Turn the ignition switch ON (II).

15. Measure voltage between body ground and PCM

connector terminal B23.

Substitute a known-good PCM and recheck

(see page 11-5). If the symptom/indication goes
away, replace the original PCM.

Replace the IAC valve.

Wire side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

03/07/29 09:23:06 61S0X050_110_0187

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’99-00, ’02-04 Models

YES

11-188

Idle Control System

A/C Signal Circuit Troubleshooting

PCM CONNECTORS

ACS (BLU/RED)

A (32P)

LG1 (BRN/BLK)

B (25P)

LG1 (BRN/YEL)*

PCM CONNECTORS

JUMPER WIRE

LG1 (BRN/BLK)

B (25P)

ACC (RED)

A (32P)

LG1 (BRN/YEL)*

NOTE: Information marked with an asterisk ( ) applies
to ’02-04 models.

1. Turn the ignition switch OFF.

2. Disconnect the A/C pressure switch 4P connector.

3. Turn the ignition switch ON (II).

4. Measure voltage between PCM connector

terminals A27 and B20.

Go to step 5.

Go to step 12.

5. Turn the ignition switch OFF.

6. Reconnect the A/C pressure switch 4P connector.

7. Turn the ignition switch ON (II).

8. Momentarily connect PCM connector terminals A17

and B20 with a jumper wire several times.

Go to step 9.

Go to step 15.

9. Start the engine.

10. Turn the blower switch ON.

11. Turn the A/C switch ON.

The air conditioning signal is OK.

Go to step 16.

12. Turn the ignition switch OFF.

13. Disconnect PCM connector A (32P).

Wire side of female terminals

Is ther e about 5 V ?

Is ther e a clicking noise f r om the A/ C compr essor
clutch?

Does the A/ C oper ate?

03/07/29 09:23:07 61S0X050_110_0188

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11-189

ACS (BLU/RED)

PCM CONNECTOR A (32P)

UNDER-HOOD FUSE/RELAY BOX
CONNECTOR D (16P)

ACC (RED)

JUMPER WIRE

PCM CONNECTORS

B (25P)

LG1 (BRN/BLK)

ACS (BLU/BLK)

A (32P)

LG1 (BRN/YEL)*

14. Check for continuity between body ground and

PCM connector terminal A27.

Repair short in the wire between the PCM

(A27) and the A/C pressure switch.

Substitute a known-good PCM and recheck

(see page 11-5). If the prescribed voltage is now
available, replace the original PCM. If not, check the
A/C system for other symptoms.

15. Momentarily connect under-hood fuse/relay box

16P connector terminal No. 11 to body ground with
a jumper wire several times.

NOTE: The under-hood fuse/relay box 16P

you unbolt and invert the fuse box, leave the upper
cover on to prevent short circuits.

Repair open in the wire between the PCM

(A17) and the A/C clutch relay.

Check the A/C system for other symptoms.

16. Measure voltage between PCM connector

terminals A27 and B20.

Substitute a known-good PCM and recheck

(see page 11-5). If the symptom/indication goes
away, replace the original PCM. If not, check the
A/C system for other symptoms.

Repair open in the wire between the PCM

(A27) and the A/C pressure switch.

Wire side of female terminals

Is ther e continuity?

Is ther e a clicking noise f r om the A/ C compr essor
clutch?

Is ther e less than 1.0 V ?

03/07/29 09:23:07 61S0X050_110_0189

connector is on the bottom of the fuse box. When

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