TROUBLESHOOTING
F–211
F
NO.14 POOR FUEL ECONOMY
A6E398018881W16
Diagnostic procedure
14
POOR FUEL ECONOMY
DESCRIPTION
Fuel economy is unsatisfactory.
POSSIBLE CAUSE
•
Contaminated air cleaner element
•
VIS malfunction (if equipped)
•
Engine cooling system malfunction
•
Improper ATF level (ATX)
•
Weak spark
•
Poor fuel quality
•
Erratic or no signal from CMP sensor
•
Clutch slippage (MTX)
•
VTCS malfunction
•
Improper variable valve timing control system operation (if equipped)
•
Improper coolant level
•
Inadequate fuel pressure
•
Spark plug malfunction
•
PCV valve malfunction
•
Brake dragging
•
Improper valve timing due to jumping out of timing belt
•
Contaminated MAF sensor
•
Improper engine compression
•
Exhaust system clogging
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair
procedures. Read following warnings before performing fuel system services:
•
Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always
keep sparks and flames away from fuel.
•
Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or
death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete
“BEFORE REPAIR PROCEDURE" and “AFTER REPAIR PROCEDURE” described in this
manual.
(See
F–17 BEFORE REPAIR PROCEDURE
.)
(See
F–17 AFTER REPAIR PROCEDURE
.)
Caution
•
Disconnecting/connecting quick release connector without cleaning it may possibly cause
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
STEP
INSPECTION
RESULTS
ACTION
1
Inspect for following:
•
Air cleaner element for contamination
•
ATF level
•
Fuel quality
•
Coolant level
•
Brake dragging
•
Clutch slippage
Are all items okay?
Yes
Go to next step.
No
Service as necessary.
Repeat Step 1.
2
Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed?
Yes
DTC is displayed:
Go to appropriate DTC test.
No
No DTC is displayed:
Go to next step.
3
Access ECT PID.
Drive vehicle while monitoring PID.
(See
F–45 PCM INSPECTION
.)
Is PID within specification?
Yes
Go to next step.
No
Inspect for coolant leakage, cooling fan and condenser
fan operations or thermostat operation.
Summary of Contents for 6 2002
Page 104: ...F 4 LOCATION INDEX End Of Sie FUEL SYSTEM A6E390001006W01 Engine Room Side A6E3912W015...
Page 151: ...F 36 EXHAUST SYSTEM A6E3914W002...
Page 312: ...F 182 TROUBLESHOOTING QUICK DIAGNOSTIC CHART A6E398018881W02 A6E3980W001...
Page 313: ...TROUBLESHOOTING F 183 F A6E3980W002...
Page 314: ...F 184 TROUBLESHOOTING A6E3980W003...
Page 315: ...TROUBLESHOOTING F 185 F End Of Sie A6E3980W004...
Page 410: ...K 3 K...
Page 526: ...TROUBLESHOOTING K 115 K QUICK DIAGNOSIS CHART A6E568001030W04 A6E5680W001...
Page 527: ...K 116 TROUBLESHOOTING End Of Sie A6E5680W002...
Page 653: ...ON BOARD DIAGNOSTIC ABS TCS P 57 P...
Page 701: ...TROUBLESHOOTING ABS TCS DYNAMIC STABILITY CONTROL P 105 P Vehicle with ABS TCS A6E6980W002...
Page 819: ...OUTSIDE MIRROR S 60 2 THIS PAGE IS INTENTIONALLY LEFT BLANK End Of Sie...
Page 971: ...T 76 WARNING AND INDICATOR SYSTEM Operating Order A6E8118W009...
Page 1150: ...U 4 LOCATION INDEX End Of Sie CONTROL SYSTEM A6E850001042W01 L H D A6E8500W003 A6E8500W004...
Page 1152: ...U 6 LOCATION INDEX R H D A6E8500W005 A6E8500W006...