Engine Controls - MIL ON/DTC P1659/Other DTC's Possible

05-008

January 11, 2008

Applies To:
2005 Odyssey - From VIN 5FNRL3...5B000001 thru 5FNRL3...5B059257
- From VIN 5FNRL3...5B400001 thru 5FNRL3...5B406226

MIL Comes On With DTC P1659

(Supersedes 05-008, dated March 22, 2005, to update the information marked by asterisks)

SYMPTOM

In cold temperatures, the MIL comes on with DTC P1659 (electronic throttle control system control relay OFF malfunction).

PROBABLE CAUSE

Moisture inside the throttle control relay may freeze. This would cause the relay to fail, storing DIG P1659 along with any of these DTCs:

^ P0135: Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Malfunction

^ P0141: Rear Secondary Heated Oxygen Sensor (Secondary HO2S, Bank 1, Sensor 2) Heater Circuit Malfunction

^ P0155: Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Heater Circuit Malfunction

^ P0161: Front Secondary Heated Oxygen Sensor (Secondary H025, Bank 2, Sensor 2) Heater Circuit Malfunction

*^ P0498: Evaporative Emission (EVAP) Canister Vent Shut Valve Control Circuit Low Voltage*

CORRECTIVE ACTION

Replace the electronic throttle control relay, the air/fuel sensor relay, and the starter cut relay.

NOTE:
The same type of relay is used for the air/fuel sensor relay and the starter cut relay. As a preventative measure, these relays must be replaced along with the throttle control relay.

PARTS INFORMATION

Power Relay Assembly (three required):
P/N 39794-SDA-A03, H/C 7137557

WARRANTY CLAIM INFORMATION

In warranty:
The normal warranty applies.

Operation Number: 124110

Flat Rate Time: 0.4 hour

Failed Part: P/N 39794-SDA-A04
H/C 7274228

Defect Code: 03217

Symptom Code: 03203

Template ID: 05-008A

Skill Level: Repair Technician

Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.

DIAGNOSIS

Connect the HDS to the DLC, and check for DTCs. If DTC P1659 is set, go to REPAIR PROCEDURE.

NOTE:
If the VSA light is on and DTC 83-1 (PCM communication error) is set, nothing is wrong with the VSA system. This code occurred when P1659 was set.

REPAIR PROCEDURE

1. Remove the driver's and the front passenger's door sill trim and kick panel.

* ^ Refer to page 20-95 of the 200~2006 Odyssey Service Manual, or*

^ Online, enter keyword TRIM, and select Interior Trim Removal/Installation-Door Areas from the list.





2. Replace the electronic throttle control system (ETCS) relay in the passenger's under-dash fusel relay box.





3. Replace the air/fuel (A/F) sensor relay and the starter cut relay in the driver's under-dash fusel relay box.

4. Reinstall both door sill trims and the kick panels.

5. Use the HDS to clear any stored DTCs.





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