DTC : P0973 (2016 2017 2018 2019 2020): General Description
Hydraulic pressure supply to the clutch by shift solenoid valve output (D position)
| Gear position | Shift solenoid valve | Clutch | ||||||
|---|---|---|---|---|---|---|---|---|
| A | B | 1st | 2nd | 3rd | 4th | 5th | 6th | |
| Neutral-1st | ON | OFF | CPCD | - | - | - | - | - |
| 1st | ON | ON | LINE | CPCA | CPCB | CPCC | - | - |
| 1st-2nd | ON | ON | LINE | CPCA | CPCB | CPCC | - | - |
| 2nd | ON | ON | LINE | CPCA | CPCB | CPCC | - | - |
| 2nd-3rd | ON | ON | LINE | CPCA | CPCB | CPCC | - | - |
| 3rd | OFF | ON | LINE | - | CPCB | CPCC | CPCA | - |
| 3rd-4th | OFF | ON | LINE | - | CPCB | CPCC | CPCA | - |
| 4th | OFF | OFF/(ON) | LINE | - | (CPCB) | CPCC | CPCA | CPCB |
| 4th-5th | OFF | OFF | LINE | - | - | CPCC | CPCA | CPCB |
| 5th | OFF | OFF/(ON) | LINE | - | (CPCB) | CPCC | CPCA | CPCB |
| 5th-6th | OFF | OFF | LINE | - | - | CPCC | CPCA | CPCB |
| 6th | OFF | OFF | LINE | - | - | CPCC | CPCA | CPCB |
LINE : Line pressure
CPCA: A/T clutch pressure control solenoid valve A pressure
CPCB: A/T clutch pressure control solenoid valve B pressure
CPCC: A/T clutch pressure control solenoid valve C pressure
CPCD: A/T clutch pressure control solenoid valve D pressure
When shift solenoid valves A, B, and C are turned ON, the hydraulic pressure circuit opens. The hydraulic pressure circuit supplies/discharges hydraulic pressure to/from each clutch according to the combination of the ON/OFF status of the shift solenoid valves. The powertrain control module (PCM) commands the driver circuit to turn on the shift solenoid valve. The circuit detects malfunctions such as a circuit short or open, and sends back a return signal during the PCM's command. When the return signal does not match the PCM command to turn ON the shift solenoid valve, the PCM detects a malfunction and stores a DTC.