[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - SYMPTOM PROCEDURES - Inspection Procedure 19: Abnormal Shift Indicator Display <4G63, 4G64>PRINT PAGE / INDEX / PRIOR / NEXT
Inspection Procedure 19: Abnormal Shift Indicator Display <4G63, 4G64>
OPERATION
The engine-A/T-ECU detects the shift range (sport mode) which the driver has selected, and sends the information to the combination meter.
COMMENTS ON TROUBLE SYMPTOM
The cause is probably a malfunction of the shift switch assembly, combination meter and engine-A/T-ECU.
PROBABLE CAUSES
  • Malfunction of shift switch assembly
  • Malfunction of the combination meter
  • Damaged harness wires and connectors
  • Malfunction of the engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. MUT-II/III data list
  • Item 67: Select switch
  • Item 68: Upshift switch
  • Item 69: Downshift switch
Check the above data list (Refer to data list reference table ).
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Refer to inspection procedure 18: Shift switch assembly system .
STEP 2. Measure the voltage at engine-A/T-ECU connector C-109.
  1. Confirm the shift range by using the Actuator test on the MUT-II/III, and measure the voltage at the ECU terminals.
  1. Ignition switch: ON
    2. Item No.
    		 Gear shift position
    		 Measured terminals
    Between terminal 117 and earth
    		 Between terminal 118 and earth
    		 Between terminal 105 and earth
    09
    		 3rd
    		 8 - 10 V
    		 8 - 10 V
    		 1 V or less
    10
    		 4th
    		 1 V or less
    		 1 V or less
    		 8 - 10 V

Q: Is the check result normal?
YES:  Go to Step 4.
NO:  Go to Step 3.
STEP 3. Connectors check: C-109 engine-A/T-ECU connector, C-105 intermediate connector, C-04 combination connector
Check for the contact with terminals.
Q: Is the check result normal?
YES:  Replace the engine-A/T-ECU.
NO:  Repair the defective connector.
STEP 4. Measure the voltage at combination meter connector C-04.
  1. Remove the combination meter.
  1. Confirm the shift range by using the Actuator test on the MUT-II/III, and measure the voltage at the combination meter harness-side connector terminals.
  1. Ignition switch: ON
    2. Item No.
    		 Gear shift position
    		 Measured terminals
    Between terminal 50 and earth
    		 Between terminal 51 and earth
    		 Between terminal 52 and earth
    09
    		 3rd
    		 8 - 10 V
    		 8 - 10 V
    		 1 V or less
    10
    		 4th
    		 1 V or less
    		 1 V or less
    		 8 - 10 V

Q: Is the check result normal?
YES:  Go to Step 7.
NO:  Go to Step 5.
STEP 5. Connectors check: C-04 combination meter connector, C-105 intermediate connector, C-109 engine-A/T-ECU connector
Check for the contact with terminals.
Q: Is the check result normal?
YES:  Go to Step 6.
NO:  Repair the defective connector.
STEP 6. Check the harness between combination meter connector C-04 terminal No.50, 51, 52 and engine-A/T-ECU connector C-109 terminal No.117, 118, 105.
Check the output line for short-circuited or open circuit.
Q: Is the check result normal?
YES:  Replace the engine-A/T-ECU.
NO:  Repair the wiring harness.
STEP 7. Connector check: C-04 combination meter connector
Check for the contact with terminals.
Q: Is the check result normal?
YES:  Replace the combination meter.
NO:  Repair the defective connector.
[23A] AUTOMATIC TRANSMISSION (FF) - - TROUBLESHOOTING <A/T> - SYMPTOM PROCEDURES - Inspection Procedure 19: Abnormal Shift Indicator Display <4G63, 4G64>PRINT PAGE / INDEX / PRIOR / NEXT
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