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Road Test

NOTE: If shift lever cannot be moved from "P" with brake pedal depressed and accelerator pedal at idle position, check shift interlock system. See the appropriate AUTO TRANS ELECT DIAGNOSIS - MPYA article in this section. Refer to the following menu.
  1. Warm engine to normal operating temperature. Apply parking brake and block wheels. Start engine. Move shift lever to "D4" while depressing brake pedal. Depress accelerator pedal and release it suddenly. Engine should not stall.
  2. Repeat step 1) in "D". Ensure engine does not stall. Ensure ignition is off. Remove door sill molding on passenger's side and remove small cover on right kick panel. Pull carpet back for access to the ECU.
  3. Remove bracket from above ECU. Install Test Harness (07LAJ-PT3010A) between ECU and connector. ECU is located on passenger's side, below carpet. See Fig 1 .
    NOTE: Test harness is installed so throttle angle sensor voltage can be monitored while performing road test.
    Fig 1: Installing Test Harness At PGM-FI ECU
    G93E23881Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Install Digital Volt-Ohmmeter (DVOM) on test harness with positive lead at terminal D11 and negative lead at terminal D22. Terminal numbers are on top of test harness. See Fig 1 . Ensure digital volt-ohmmeter is set for measuring voltage.
  5. Road test vehicle and check for abnormal noise and clutch slippage. Specified clutch is applied in designated gears. Refer to the CLUTCH APPLICATION  table.
  6. Ensure shift points are within specification in accordance with throttle angle sensor voltage reading or throttle position with shift lever in "D4" position. See TRANSAXLE UPSHIFT SPECIFICATIONS  and TRANSAXLE DOWNSHIFT SPECIFICATIONS  tables.
  7. With shift lever in "D4", accelerate to about 35 MPH so transaxle is in 4th gear. Move shift lever to "2" position, and ensure engine braking occurs.
    CAUTION: DO NOT  shift from "D4" to "2" at speeds over 62.5 MPH or transaxle may be damaged.
  8. Place shift lever in "1". Accelerate from a stop at full throttle. Check for abnormal noise or clutch slippage. Upshifts and downshifts should not occur in this range.
  9. Place shift lever in "2". Accelerate from a stop at full throttle. Check for abnormal noise or clutch slippage. Upshifts and downshifts should not occur in this range.
  10. Place shift lever in "R". Accelerate from a stop at full throttle. Check for abnormal noise or clutch slippage.
  11. Park vehicle on a slope. Apply parking brake and place shift lever in "P". Release parking brake and ensure vehicle does not move. If vehicle moves, check for defective shift cable or parking components.
  12. Shut engine off. Remove test harness and reconnect ECU electrical connectors.
CLUTCH APPLICATION

Shift Lever Position Elements In Use
Park & Neutral No Clutches Applied
"R" Reverse Clutch
"D4"
1st Gear 1st Clutch
2nd Gear (1) 2nd Clutch
3rd Gear (2) 3rd Clutch
4th Gear (2) 4th Clutch
"D"
1st Gear 1st Clutch
2nd Gear (1) 2nd Clutch
3rd Gear (2) 3rd Clutch
"2" 1st-Hold Clutch, 2nd Clutch
"1" 1st-Hold Clutch, 1st Clutch
(1) The 1st clutch engages, but driving power is not transmitted, as one-way clutch slips.
(2) The 1st and 2nd clutches engage, but driving power is not transmitted, as one-way clutch on 1st gear and 2nd gear slips.
TRANSAXLE UPSHIFT SPECIFICATIONS (MPH)

"D4" Position & Condition 1st-2nd Gear 2nd-3rd Gear 3rd-4th Gear Lock-Up Clutch On
Throttle Angle Sensor Voltage .82-.88 Volt (1/16 Throttle) & Coasting Downhill From Stop 9-12 16-19 23-28 17-20
Throttle Angle Sensor Voltage 2.18-2.32 Volts (7/16 Throttle) & Accelerating From Stop
1991 Models 25-29 36-42 51-57 72-77
1992 Models 20-24 37-42 52-58 72-77
Full Throttle Accelerating From Stop 37-42 65-74 99-110 101-112
TRANSAXLE DOWNSHIFT SPECIFICATIONS (MPH)

Shift Lever Position Lock-Up Clutch Off 4th-3rd Gear 3rd-2nd Gear 2nd-1st Gear
Throttle Angle Sensor Voltage .82-.88 Volt (1/16 Throttle) & Coasting Or Braking To A Stop
1991 Models 16-19 18-21 (1) 8-11
1992 Models 16-19 18-21 (1) 6-9
Throttle Angle Sensor Voltage 2.18-2.32 Volts (7/16 Throttle) & Vehicle Slowing By Grade Or Load 59-64 (1) (1) (1)
Full Throttle Vehicle Slowing By Grade Or Load 96-107 85-96 54-61 4-30
(1) Specification not available from manufacturer.
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