DESCRIPTION Shifting from
1st to 6th is performed in combination with ON and OFF operation of the
shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR, which are
controlled by the ECM. If an open or short circuit occurs in any of the
shift solenoid valves, the ECM controls the remaining normal shift
solenoid valves to allow the vehicle to be operated safely. Also, the
ECM stops sending current to the open or short-circuited solenoid (See
page  ). |
DTC Code | DTC Detection Condition |
Trouble Area | | P0973 |
ECM detects a short in the solenoid valve S1 circuit 2 times when solenoid valve S1 is operated (1-trip detection logic). |
- Short in shift solenoid valve S1 circuit
- Shift solenoid valve S1
- ECM
| | P0974 |
ECM detects an open in the solenoid valve S1 circuit 2 times when solenoid valve S1 is not operated (1-trip detection logic). |
- Open in shift solenoid valve S1 circuit
- Shift solenoid valve S1
- ECM
| MONITOR DESCRIPTION
These
DTCs indicate an open or short in the shift solenoid valve S1 circuit.
When there is an open or short circuit in any shift solenoid valve
circuit, the ECM detects the problem, illuminates the MIL and stores the
DTC. When the shift solenoid valve S1 is ON, if its resistance is 8 Ω
or less, the ECM determines there is a short in the shift solenoid valve
S1 circuit. When the shift solenoid valve S1 is
OFF, if its resistance is 100 kΩ or more, the ECM determines there is
an open in the shift solenoid valve S1 circuit (See page
). MONITOR STRATEGY |
Related DTCs | P0973: Shift solenoid valve S1/Range check (Low resistance)
P0974: Shift solenoid valve S1/Range check (High resistance) | |
Required sensors/Components | Shift solenoid valve S1 | |
Frequency of operation | Continuous | |
Duration | 0.128 seconds or more | |
MIL operation | Immediately | |
Sequence of operation | None | TYPICAL ENABLING CONDITIONS All |
The monitor will run whenever the following DTCs are not present |
None | | Battery voltage |
8 V or more | | Ignition switch |
ON | | Starter |
OFF | P0973: Range Check (Low Resistance) |
Command to shift solenoid valve S1 | ON | P0974: Range Check (High Resistance) |
Command to shift solenoid valve S1 | OFF | TYPICAL MALFUNCTION THRESHOLDS P0973: Range Check (Low Resistance) |
Shift solenoid valve S1 resistance | 8 Ω or less | P0974: Range check (High Resistance) |
Shift solenoid valve S1 resistance | 100 kΩ or more | COMPONENT OPERATING RANGE |
Shift solenoid valve S1 resistance | 11 to 15 Ω at 20°C (68°F) | WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE: Perform the universal trip to clear permanent DTCs (See page
). HINT: The shift solenoid valve S1 is turned ON/OFF normally when the shift lever is in D: |
ECM gear shift command | 1st |
2nd | 3rd |
4th | 5th |
6th | | Shift solenoid valve S1 |
OFF | ON |
ON | ON |
ON | ON | PROCEDURE
| 1. |
INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE S1) |
| (a) Disconnect the D83 transmission wire connector. | |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
10 (S1) - Body ground |
20°C (68°F) | 11 to 15 Ω | Text in Illustration |
*a | Component without harness connected
(Transmission Wire) |
| NG |
 | GO TO STEP 3 |
|
OK |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
| (a) Disconnect the D74 ECM connector. | |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
D74-7 (S1) - Body ground |
20°C (68°F) | 11 to 15 Ω | Text in Illustration |
*a | Front view of wire harness connector
(to ECM) |
| OK |
| REPLACE ECM |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 3. |
INSPECT SHIFT SOLENOID VALVE S1 |
| OK | |
REPAIR OR REPLACE TRANSMISSION WIRE |
| NG |
| REPLACE SHIFT SOLENOID VALVE S1 | | 
