A/T - MIL ON DTC's P1768 and P1773 Set: Overview

97-029

Applies To: 1997 Prelude with A/T thru VIN JHMBB6 ... VC012298

April 21, 1997

MIL Stays On After Starting/DTCs P1768 and P1773

SYMPTOM
The Malfunction Indicator Lamp (MIL) stays on after starting the engine, and the PGM Tester (with version 7.22 or later) displays DTCs P1768 and P1773 in the Honda Systems A/T menu, or the MIL flashes DTCs 16 and 23 if you use the SOS service connector.

- If both DTCs are indicated, go to REPAIR PROCEDURE. If only one code is present, disregard this bulletin, and follow the troubleshooting procedures in section 14 of the service manual.

- If the MIL is on, and the PGM Tester displays "No A/T DTCs," go to DIAGNOSIS to confirm the symptom.

NOTE: When the malfunction initially occurs, the MIL stays on and the D4 light flashes. During the next driving cycle, the D4 light will not flash unless the malfunction occurs again.

PROBABLE CAUSE
Electrical spikes from the ignition switch affect the Transmission Control Module (TCM).

CORRECTIVE ACTION
Replace the TCM.

PARTS INFORMATION
Transmission Control Module (TCM):
P/N 281 00-P5M-A01, H/C 5201660

WARRANTY CLAIM INFORMATION

In warranty:
The normal warranty applies.

Operation number: 218117

Flat rate time: 0.3 hour

Failed part: P/N 28100-P5M-A01
H/C 5201660

Defect code: 072

Contention code: B03

Template ID: 97-029A

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