Troubleshooting Procedures
Contents
1. ED problem code is retained in memory it will blink again whenever the ignition key is turned on If the LED problem code is not memorized check the following causes Check the EFI ECU fuse 10A in the under hood relay box Check for an open circuit in the WHT YEL wire between the EFI ECU fuse 10A and A T conrtoi unit B12 terminal After making repair disconnect the EFl ECU fuse 10A in the under hood relay box for more than ten seconds to reset LED display memory 9 302. Troubleshooting Procedures The A T Control Unit has a built in self diagnosis function The S4 indicator light in the gauge assembly and LED display on the A T control unit blink when the A T control unit senses an abnormality in the input or output systems The number of blinks from the LED display varies according to the problem which can be diagnosed by counting the number of blinks For problem diagnosis count the number of blinks from the LED display as shown on the Symptom to Component Chart on page 9 31 If no abnormality is found from your inspection refer to the hydraulic system Symptom to Component Chart on page 9 57 LED DISPLAY When the ignition switch is turned ON the Sa indicator light comes on for about two seconds regardless of whether there is a problem The Sa indicator light will also come on when in S4 mode If there is a system problem the S4 indicator light will come on and continue to blink until the ignition key is turned OFF When the ignition key is turned ON again the Sa indicator light will not blink again for the original problem But if the A T control unit senses the original abnormality again with ignition switch ON the Sa indicator light will blink again for the original problem Therefore even though the S4 indicator light does not come on when turning the ignition key ON check the LED display for automatic transmission problem diagnosis Since the L
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