Civic Sedan L4-1493cc 1.5L SOHC (D15B2) TBI (1989)
Throttle Position Sensor: Customer Interest
Engine - Occasional Rough Idle
Bulletin No.
91-031
Issue Date
NOV. 1, 1991
File Under
ENGINE
Model
'89-91
CIVIC
Applicable To
SEE VEHICLES
AFFECTED
Occasional Rough Idle
SYMPTOM
1.
The engine may occasionally idle roughly or erratically after coming to a stop with the throttle fully-closed.
2.
On 1990-91 cars equipped with automatic transmission: Even though the proper procedure is followed, the shift interlock system may occasionally
prevent the driver from shifting out of Park.
VEHICLES AFFECTED
All 1988-91 Civic models equipped with 1.5 liter engine and dual-point injection, thru VIN:
1HGED3...ML011574 (Sedan)
2HGED6...MH512869 (Hatchback)
JHMED3...MS031565 (Sedan)
JHMED8...MS012826 (CRX DX)
JHMEE2...MS004778 (2WD Wagon)
PROBABLE CAUSE
Inadequate grounding of the throttle angle sensor circuit.
CORRECTIVE ACTION
Replace the existing ground wire with the new ground harness listed under PARTS INFORMATION.
1.
Disconnect the three-pin connector from the throttle angle sensor.
2.
Remove the GRN/WHT wire from the three-pin connector with Pin Tool E, T/N 07JAZ-002050A, from the Terminal Pin Repair Kit (see TOOL
INFORMATION).