Part 1
AA80F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P2808: Pressure Control Solenoid "G" Performance (Shift Solenoid Valve SL4)
P2808 - Pressure Control Solenoid "G" Performance (Shift Solenoid Valve SL4)
DESCRIPTION
Based on signals from the transmission speed sensors (NT and NC), the gear position is detected. If the detected gear position is different than the commanded gear position, the TCM detects related mechanical problems in the shift solenoid valves, valve body and automatic transmission.
HINT
Gear shift position when a problem occurs in shift solenoid valve SL4:
*: Neutral
MONITOR DESCRIPTION
The TCM commands gear shifts by turning the shift solenoid valves on or off. According to the input shaft speed, intermediate (counter) shaft speed and output shaft speed, the TCM detects the actual gear position (1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear position). When the gear position commanded by the TCM and the actual gear position are not the same, the TCM illuminates the MIL.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All
OFF malfunction (A)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
OFF malfunction (B)
OFF malfunction (C)
OFF malfunction (D)
OFF malfunction (E)
ON malfunction (A)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
ON malfunction (B)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
ON malfunction (C)
