Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT INPUT/TURBINE SPEED SIGNAL FOR MALFUNCTION Inspect the value at the following TCM PID using the M-MDS (IDS). (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION .) TSS Is the PID value normal?	Yes	Go to the next step.
1		No	Repair or replace any malfunctioning parts according to the inspection result.
2	INSPECT TCM FOR POOR GND Disconnect the TCM connector. Is the resistance between the GND terminal at the TCM connector and the body GND less than 5.0 ohms ?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness for a possible open circuit. Reconnect the TCM connector.
3	INSPECT SHIFT SOLENOID A OR E CONTROL SIGNAL CIRCUIT FOR MALFUNCTION Inspect the resistance between shift solenoid A and E control circuit at the TCM connector and control valve body connector. Inspect the resistance between shift solenoid A/E circuit at the TCM connector and control valve body connector. Are the resistances less than 5.0 ohms ?	Yes	Go to the next step.
3		No	Repair or replace the shift solenoid A and/or E circuit.
4	INSPECT SHIFT SOLENOID A OR E FOR MALFUNCTION Inspect the shift solenoid A and E. (See SOLENOID VALVE INSPECTION .) Are the shift solenoids operating properly?	Yes	Go to the next step.
4		No	Overhaul the control valve body and repair or replace any malfunctioning parts. (See Automatic Transaxle Workshop Manual FS5A-EL.) If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts. (See Automatic Transaxle Workshop Manual FS5A-EL.)
5	VERIFY IF MALFUNCTION CAUSE IS TCM CONTROL OR TRANSAXLE (INCLUDING CONTROL VALVE BODY) Inspect the value at the following TCM PID using the M-MDS (IDS). (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION .) LPS Is the PID value normal?	Yes	Overhaul the control valve body and repair or replace any malfunctioning parts. (See Automatic Transaxle Workshop Manual FS5A-EL.) If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts. (See Automatic Transaxle Workshop Manual FS5A-EL.)
5		No	Replace the TCM. (See TCM REMOVAL/INSTALLATION .)
6	Verify the test results. If normal, return to the diagnostic index to service any additional symptoms. If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If the vehicle is repaired, troubleshooting is completed. If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION .)