INSPECTION
When any on-board diagnostics item is malfunctioning, the display on the AT OIL TEMP warning light blinks from the time the malfunction is detected after starting the engine until the ignition switch is turned OFF. The malfunctioning part or unit can be determined by a trouble code during on-board diagnostics operation. Problems which occurred previously can also be identified through the memory function. If the AT OIL TEMP warning does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the select monitor. Indicator signal is as shown in the figure.
Identifying ATF Temperature Warning Light Display. Scheme 733
Diagnostic Trouble Code Chart. Scheme 734
DIAGNOSIS
The AT OIL TEMP warning light circuit is open or shorted.
Scheme 735
Scheme 736
Scheme 737
- When ignition switch is turned to ON (engine OFF), AT OIL TEMP warning light does not illuminate.
- When on-board diagnostics is performed, AT OIL TEMP warning light remains illuminated. (Scheme 735): At Oil Temp Warning Light Does Not Come On Or Go Off Wiring Diagram (Scheme 736): Diagnostic Procedure for AT Oil Temp Warning Light Diagnostic Procedure - Chart (1 Of 2) (Scheme 737): Diagnostic Procedure for AT Oil Temp Warning Light Diagnostic Procedure - Chart (2 Of 2)
Diagnostic Procedure with Trouble Code
| DTC | Description |
|---|---|
| CODE 11 | ENGINE SPEED SIGNAL |
| CODE 27 | ATF TEMPERATURE SENSOR |
| CODE 31 | THROTTLE POSITION SENSOR |
| CODE 33 | FRONT VEHICLE SPEED SENSOR |
| CODE 36 | TORQUE CONVERTER TURBINE SPEED SENSOR |
| CODE 38 | TORQUE CONTROL SIGNAL |
| CODE 45 | INTAKE MANIFOLD PRESSURE SIGNAL |
| CODE 71 | SHIFT SOLENOID 1 |
| CODE 72 | SHIFT SOLENOID 2 |
| CODE 73 | LOW CLUTCH TIMING SOLENOID |
| CODE 74 | 2-4 BRAKE TIMING SOLENOID |
| CODE 75 | LINE PRESSURE DUTY SOLENOID |
| CODE 76 | 2-4 BRAKE DUTY SOLENOID |
| CODE 77 | LOCK-UP DUTY SOLENOID |
| CODE 79 | TRANSFER DUTY SOLENOID |
| CODE 86 | VDC COMMUNICATION SIGNAL |
| CODE 93 | REAR VEHICLE SPEED SENSOR |
DIAGNOSTIC TROUBLE CODES (DTC) LIST
- Faulty harness connector
Scheme 738
Scheme 739
Scheme 740
- AT OIL TEMP warning light remains on. (Scheme 738): Diagnostic Procedure With Trouble Code Wiring Diagram (Scheme 739): Diagnostic Procedure With Trouble Code Diagnostic Procedure - Chart (1 Of 2) (Scheme 740): Diagnostic Procedure With Trouble Code Diagnostic Procedure - Chart (2 Of 2)
Engine speed input signal circuit is open or shorted.
Scheme 741
Scheme 742
Scheme 743
Scheme 744
- No lock-up (after engine warm-up).
- AT OIL TEMP warning remains on when vehicle speed is "0".
- 2.5 L ENGINE MODEL (Scheme 741): Trouble Code 11 - Engine Speed Signal Wiring Diagram (2.5 L)
- 3.0 L ENGINE MODEL (Scheme 742): Trouble Code 11 - Engine Speed Signal Wiring Diagram (3.0 L) (Scheme 743): Trouble Code 11 - Diagnostic Chart (1 Of 2) (Scheme 744): Trouble Code 11 - Diagnostic Chart (2 Of 2)
Input signal circuit of TCM to ATF temperature sensor is open or shorted.
TROUBLE SYMPTOM
Excessive shift shock.
Trouble Code 27 - ATF Temperature Sensor Wiring Diagram. Scheme 745
Trouble Code 27 - Diagnostic Chart (1 Of 3). Scheme 746
Trouble Code 27 - Diagnostic Chart (2 Of 3). Scheme 747
Trouble Code 27 - Diagnostic Chart (3 Of 3). Scheme 748
Input signal circuit of throttle position sensor is open or shorted.
Shift point too high or too low; excessive shift shock; excessive tight corner "braking".
Scheme 749
Scheme 750
Scheme 751
Scheme 752
Scheme 753
Scheme 754
- 2.5 L ENGINE MODEL (Scheme 749): Trouble Code 31 - Throttle Position Sensor Wiring Diagram (2.5 L)
- 3.0 L ENGINE MODEL (Scheme 750): Trouble Code 31 - Throttle Position Sensor Wiring Diagram (3.0 L) (Scheme 751): Trouble Code 31 - Diagnostic Chart (1 Of 4) (Scheme 752): Trouble Code 31 - Diagnostic Chart (2 Of 4) (Scheme 753): Trouble Code 31 - Diagnostic Chart (3 Of 4) (Scheme 754): Trouble Code 31 - Diagnostic Chart (4 Of 4)
- The vehicle speed signal is abnormal.
- The circuit in combination meter is faulty.
- The harness connector between TCM and vehicle speed sensor is in short or open.
Scheme 755
Scheme 756
Scheme 757
Scheme 758
- Erroneous idling.
- Engine stalls.
- Poor driving performance. (Scheme 755): Trouble Code 33 - Front Vehicle Speed Sensor Wiring Diagram (Scheme 756): Trouble Code 33 - Diagnostic Chart (1 Of 3) (Scheme 757): Trouble Code 33 - Diagnostic Chart (2 Of 3) (Scheme 758): Trouble Code 33 - Diagnostic Chart (3 Of 3)
Input signal circuit of TCM is open or shorted.
Excessive shift shock.
Trouble Code 36 - Torque Converter Turbine Speed Sensor Wiring Diagram. Scheme 759
Trouble Code 36 - Diagnostic Chart (1 Of 2). Scheme 760
Trouble Code 36 - Diagnostic Chart (2 Of 2). Scheme 761
- The signal circuit is open or shorted.
Excessive shift shock.
Scheme 762
Scheme 763
Scheme 764
Scheme 765
- 2.5 L ENGINE MODEL (Scheme 762): Trouble Code 38 - Torque Control Signal Wiring Diagram (2.5 L)
- 3.0 L ENGINE MODEL (Scheme 763): Trouble Code 38 - Torque Control Signal Wiring Diagram (3.0 L) (Scheme 764): Trouble Code 38 - Diagnostic Chart (1 Of 2) (Scheme 765): Trouble Code 38 - Diagnostic Chart (2 Of 2)
Input signal circuit of TCM from ECM is open or shorted.
Excessive shift shock.
Scheme 766
Scheme 767
Scheme 768
Scheme 769
- 2.5 L and 3.0 L (Scheme 766): Trouble Code 45 - Intake Manifold Pressure Signal Wiring Diagram (2.5 L) (Scheme 767): Trouble Code 45 - Intake Manifold Pressure Signal Wiring Diagram (3.0 L) (Scheme 768): Trouble Code 45 - Diagnostic Chart (1 Of 2) (Scheme 769): Trouble Code 45 - Diagnostic Chart (2 Of 2)
Output signal circuit of shift solenoid 1 is open or shorted.
Does not shift.
Trouble Code 71 - Shift Solenoid 1 Wiring Diagram. Scheme 770
Trouble Code 71 - Diagnostic Chart (1 Of 3). Scheme 771
Trouble Code 71 - Diagnostic Chart (2 Of 3). Scheme 772
Trouble Code 71 - Diagnostic Chart (3 Of 3). Scheme 773
Output signal circuit of shift solenoid 2 is open or shorted.
Does not shift.
Trouble Code 72 - Shift Solenoid 2 Wiring Diagram. Scheme 774
Trouble Code 72 - Diagnostic Chart (1 Of 3). Scheme 775
Trouble Code 72 - Diagnostic Chart (2 Of 3). Scheme 776
Trouble Code 72 - Diagnostic Chart (3 Of 3). Scheme 777
Output signal circuit of low clutch timing solenoid is open or shorted.
Excessive shift shock.
Trouble Code 73 - Low Clutch Timing Solenoid Wiring Diagram. Scheme 778
Trouble Code 73 - Diagnostic Chart (1 Of 3). Scheme 779
Trouble Code 73 - Diagnostic Chart (2 Of 3). Scheme 780
Trouble Code 73 - Diagnostic Chart (3 Of 3). Scheme 781
Output signal circuit of 2-4 brake timing solenoid is open or shorted.
Excessive shift shock.
Trouble Code 74 - 2-4 Brake Timing Solenoid Wiring Diagram. Scheme 782
Trouble Code 74 - Diagnostic Chart (1 Of 4). Scheme 783
Trouble Code 74 - Diagnostic Chart (2 Of 4). Scheme 784
Trouble Code 74 - Diagnostic Chart (3 Of 4). Scheme 785
Trouble Code 74 - Diagnostic Chart (4 Of 4). Scheme 786
Output signal circuit of line pressure duty solenoid or resistor is open or shorted.
Excessive shift shock.
Trouble Code 75 - Line Pressure Duty Solenoid Wiring Diagram. Scheme 787
Trouble Code 75 - Diagnostic Chart (1 Of 5). Scheme 788
Trouble Code 75 - Diagnostic Chart (2 Of 5). Scheme 789
Trouble Code 75 - Diagnostic Chart (3 Of 5). Scheme 790
Trouble Code 75 - Diagnostic Chart (4 Of 5). Scheme 791
Trouble Code 75 - Diagnostic Chart (5 Of 5). Scheme 792
Output signal circuit of 2-4 brake duty solenoid is open or shorted.
Excessive shift shock.
Trouble Code 76 - 2-4 Brake Duty Solenoid Wiring Diagram. Scheme 793
Trouble Code 76 - Diagnostic Chart (1 Of 5). Scheme 794
Trouble Code 76 - Diagnostic Chart (2 Of 5). Scheme 795
Trouble Code 76 - Diagnostic Chart (3 Of 5). Scheme 796
Trouble Code 76 - Diagnostic Chart (4 Of 5). Scheme 797
Trouble Code 76 - Diagnostic Chart (5 Of 5). Scheme 798
Output signal circuit of lock-up duty solenoid is open or shorted.
No "lock-up" (after engine warm-up).
Trouble Code 77 - Lock-Up Duty Solenoid Wiring Diagram. Scheme 799
Trouble Code 77 - Diagnostic Chart (1 Of 4). Scheme 800
Trouble Code 77 - Diagnostic Chart (2 Of 4). Scheme 801
Trouble Code 77 - Diagnostic Chart (3 Of 4). Scheme 802
Trouble Code 77 - Diagnostic Chart (4 Of 4). Scheme 803
Output signal circuit of transfer duty solenoid is open or shorted.
Excessive "braking" in tight corners.
Trouble Code 79 - Transfer Duty Solenoid Wiring Diagram. Scheme 804
Trouble Code 79 - Diagnostic Chart (1 Of 4). Scheme 805
Trouble Code 79 - Diagnostic Chart (2 Of 4). Scheme 806
Trouble Code 79 - Diagnostic Chart (3 Of 4). Scheme 807
Trouble Code 79 - Diagnostic Chart (4 Of 4). Scheme 808
Input signal circuit of TCM is open or shorted.
Trouble Code 86 - VDC Communication Signal Wiring Diagram. Scheme 809
Trouble Code 86 - Diagnostic Chart (1 Of 2). Scheme 810
Trouble Code 86 - Diagnostic Chart (2 Of 2). Scheme 811
Input signal circuit of TCM is open or shorted.
No lock-up or excessive tight corner "braking".
Trouble Code 93 - Rear Vehicle Speed Sensor Wiring Diagram. Scheme 812
Trouble Code 93 - Diagnostic Chart (1 Of 3). Scheme 813
Trouble Code 93 - Diagnostic Chart (2 Of 3). Scheme 814
Trouble Code 93 - Diagnostic Chart (3 Of 3). Scheme 815
Gear Position - Diagnostic Chart. Scheme 816
Scheme 817
Scheme 818
Scheme 819
- LED does not come on even if FWD switch is ON.
- FWD switch circuit is open or short. (Scheme 817): Check FWD Switch Wiring Diagram (Scheme 818): FWD Switch - Diagnostic Chart (1 Of 2) (Scheme 819): FWD Switch - Diagnostic Chart (2 Of 2)
Brake Switch - Diagnostic Chart. Scheme 820
ABS Switch - Diagnostic Chart. Scheme 821
Cruise Control Switch - Diagnostic Chart. Scheme 822
Input signal circuit of inhibitor switch is open or shorted.
Scheme 823
Scheme 824
Scheme 825
Scheme 826
Scheme 827
Scheme 828
Scheme 829
Scheme 830
Scheme 831
Scheme 832
Scheme 833
Scheme 834
- Shift characteristics are erroneous.
- Engine brake is not effected when selector lever is in "3" range.
- Engine brake is not effected when selector lever is in "2" range.
- Engine brake is not effected when selector lever is in "1" range. (Scheme 823): Check Inhibitor Switch Wiring Diagram (Scheme 824): Inhibitor Switch - Diagnostic Chart (1 Of 11) (Scheme 825): Inhibitor Switch - Diagnostic Chart (2 Of 11) (Scheme 826): Inhibitor Switch - Diagnostic Chart (3 Of 11) (Scheme 827): Inhibitor Switch - Diagnostic Chart (4 Of 11) (Scheme 828): Inhibitor Switch - Diagnostic Chart (5 Of 11) (Scheme 829): Inhibitor Switch - Diagnostic Chart (6 Of 11) (Scheme 830): Inhibitor Switch - Diagnostic Chart (7 Of 11) (Scheme 831): Inhibitor Switch - Diagnostic Chart (8 Of 11) (Scheme 832): Inhibitor Switch - Diagnostic Chart (9 Of 11) (Scheme 833): Inhibitor Switch - Diagnostic Chart (10 Of 11) (Scheme 834): Inhibitor Switch - Diagnostic Chart (11 Of 11)
