Diagnostic codes (F4A42) (Mitsubishi Space Star)

Code	Malfunction
11	Short circuit in the electrical circuit of the throttle position sensor
12	Open circuit of the throttle position sensor.
14	Throttle Position Sensor Mismatch
15	Transmission Fluid Temperature Sensor Circuit Open
21	Open circuit of crankshaft angle sensor
22	Short circuit/open circuit in input shaft sensor
23	Short circuit/open circuit in output shaft sensor circuit
25	Short circuit in the wide open throttle position sensor circuit
26	Damage to the brake light switch circuit
31	Low and reverse solenoid valve circuit failure
32	Damage to the downshift solenoid valve circuit
33	Damage to the second gear solenoid valve target
34	Damage to the target of the overdrive solenoid valve
36	Damage to the clutch damper solenoid valve circuit
41	1st gear ratio is out of specification
42	2nd gear ratio is out of specification
43	3rd gear ratio is out of specification
44	4th gear ratio is out of specification
46	Reverse gear ratio is out of specification
51	Communication failure with the electronic control unit
52	The clutch damper solenoid valve is faulty
54	Short circuit to ground/open circuit of automatic transmission control relay
56	Short circuit to ground of the N position indicator lamp of the automatic transmission selector lever

1. Take a trip to warm up the gearbox to a temperature of 70-80°C.

Note

1) Measure the transmission fluid temperature using the MUT-II device.

2) Referring to the diagram shown in Figure 13.8, determine the transmission fluid level, since it will take some time for the fluid to warm up to a temperature of 70-80°C.

Fig. 13.8. Transmission fluid level vs. temperature diagram

2. Park the car on a level, horizontal surface.

The article was taken from the website MITSUBISHIMAN.ru

3. With the engine running, move the selector lever from position N to all positions and back to position N.

4. Before removing the dipstick, wipe off any dirt from the area around the dipstick. Remove the dipstick and check the condition of the transmission fluid. Check the color of the automatic transmission fluid. Check the automatic transmission fluid for unusual odors. Compare the fluid to fresh fluid to determine if the color or odor has changed.

Note: If the automatic transmission fluid has a burnt odor or is contaminated with particles from bushing material or friction, a major transmission overhaul may be required, as well as a flush of the heat exchanger and tubes.

5. Check the fluid level, which should be between the HOT marks (Fig. 13.9). If necessary, add the required amount of fluid. A low fluid level can be the cause of many malfunctions, since air gets into the fluid, and the suspension of fluid with air becomes compressible, which leads to an erratic change in pressure and disruption of the clutches and band brakes. Also, an increased fluid level causes the rotating gears of the gearbox to whip up foam, which leads to the same results as air getting into the transmission fluid. In any case, air bubbles lead to overheating and oxidation of the transmission fluid, which, getting into the valves, disrupts the clutch and brakes. Foaming can lead to fluid leakage, which can be mistaken for a fluid leak.