TROUBLESHOOTING GUIDE — 25 POOR ACCELERATION
F-60flowchart25 POOR ACCELERATION
Description and troubleshooting hints
Performance poor while accelerating
Detail
NOTE
[TROUBLESHOOTING HINTS] (1) Factors other than engine malfunction: Clutch slipping; Brake dragging; Low tire pressure; Unrecommended tire size; Overloaded. (2) Low intake air amount: Throttle valve not open fully; Clogged intake air system. (3) Air/Fuel mixture too lean or too rich: Fuel line pressure low or high; Insufficient fuel injection. (4) Poor ignition. (5) Low engine compression.
Troubleshooting steps 1-4
1
INSPECTIONCheck factors other than engine: Clutch slipping (page H-3); Brake dragging (page P-27); Low tire pressure (page Q-3); Unrecommended tire size (page Q-2)
RESULTYes
ACTIONGo to next step
1
INSPECTION
RESULTNo
ACTIONRepair
2
INSPECTIONCheck if throttle valve fully opens when depressing accelerator fully
RESULTYes
ACTIONGo to next step
2
INSPECTION
RESULTNo
ACTIONCheck if accelerator cable is correctly installed (page F-96). If OK, check throttle body (page F-94). If not OK, install accelerator cable correctly (page F-96).
3
INSPECTIONCheck if "00" is displayed on Self-Diagnosis Checker with ignition switch ON (page F-78)
RESULTYes
ACTIONGo to next step
3
INSPECTION
RESULTNo
ACTIONMalfunction Code No. displayed: Check for cause (Refer to specified check sequence) (page F-80). "88" flashes: Check ECU terminal 1F voltage (page F-128). Voltage: Approx. 12V (Ignition switch ON). If OK, replace ECU (page F-127). If not OK, check wiring between ECU and Self-Diagnosis Checker (page F-7).
4
INSPECTIONCheck switches for correct operation with Self-Diagnosis Checker Monitor Lamp and ignition switch ON (page F-89)
RESULTYes
ACTIONGo to next step
4
INSPECTION
RESULTNo
ACTIONLamp not ON/OFF with specified switch: Check for cause (Refer to specified check sequence) (page F-90). Lamp always ON: Check wiring between ECU terminal 1D and Self-Diagnosis Checker (page F-7).
See also
H-3CLUTCH - OUTLINE, TROUBLESHOOTING GUIDEP-27PARKING BRAKE SYSTEMQ-3WHEELS AND TIRESQ-2OUTLINE, TROUBLESHOOTING GUIDEF-96INTAKE AIR SYSTEMF-94INTAKE AIR SYSTEMF-78SELF-DIAGNOSIS FUNCTIONF-80SELF-DIAGNOSIS FUNCTIONF-128CONTROL SYSTEM - Engine Control Unit Terminal Voltage TableF-127CONTROL SYSTEM - Engine Control Unit InspectionF-7OUTLINE - WIRING DIAGRAMF-89SELF-DIAGNOSIS FUNCTIONF-90SELF-DIAGNOSIS FUNCTION