Torque converter clutch (TCC) diagnosis test of electrical system · ad2540w6000a · Mercedes-Benz WIS

AD25.40-W-6000A

Torque converter clutch (TCC) diagnosis test of electrical system

22.9.97

ENGINE 441.9, 445.9, 446.9 in MODEL 625.1 with CODE (G02) Torque converter clutch (TCC)

ENGINE 446.9 in MODEL 625.2 with CODE (G02) Torque converter clutch (TCC)

ENGINE 402.9, 440.9, 445.9, 446.9 in MODEL 655 with CODE (G02) Torque converter clutch (TCC)

ENGINE 440.9, 441.9, 442.9, 445.9, 446.9 in MODEL 656 with CODE (G02) Torque converter clutch (TCC)

ENGINE 442.9, 446.9 in MODEL 657 with CODE (G02) Torque converter clutch (TCC)

ENGINE 440.9, 442.9, 446.9 in MODEL 658 with CODE (G02) Torque converter clutch (TCC)

ENGINE 401.9, 440.9, 442.9, 445.9, 446.9 in MODEL 659 with CODE (G02) Torque converter clutch (TCC)

 Danger!	Risk of accident due to vehicle starting off automatically when engine is running. Risk of injury due to being trapped and burns when intervening during the starting operation or when the engine is running	Secure vehicle to prevent it from starting off automatically. Wear close-fitting, tight clothing. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
	Explanation of diagnosis symbols		AD00.00-W-2001A
	Diagnosis sequence		AD00.00-W-2004A
	Diagnosis, basic knowledge, general		AD00.00-W-2010A
	Torque converter clutch (TCC) diagnosis, basic knowledge		AD25.40-W-2000A
	If there are complaints about performance, check stall speed		AD25.40-W-3000A
	In order to rule out mechanical influences on the test, beforehand - Check TCC housing and hydraulic connections for leaks, repair if necessary. If there is a visible loss of oil or the oil level is too low, the correct stall speed cannot be determined. - Check transmission fluid level and top up if necessary.
	On-board voltage 22.5-29.5 V (acid density > 1.16)
	Indicator lamps for auxiliaries go out (operating pressure 7.5-8.5 bar)
	Testing
1	Control module voltage supply, testing electrical system, TCC		AD25.40-W-6000-01A
2	Pilot control valve relay voltage supply, operating circuit, testing electrical system, TCC		AD25.40-W-6000-02A
3	Indicator lamp, testing electrical system, TCC		AD25.40-W-6000-03A
4	Pilot control valve relay, operating circuit, testing electrical system, TCC		AD25.40-W-6000-10A
5	Pilot control valve, torque converter lockup clutch, testing electrical system, TCC		AD25.40-W-6000-04A
6	Turbine speed inductive sensor, testing electrical system, TCC		AD25.40-W-6000-05A
7	Engine speed inductive sensor, testing electrical system, TCC		AD25.40-W-6000-06A
8	Actuation of indicator lamp at control module, testing electrical system, TCC		AD25.40-W-6000-13A
9	Pilot control valve relay, make contacts, testing electrical system, TCC		AD25.40-W-6000-14A
10	Lockup clutch, testing electrical system, TCC		AD25.40-W-6000-07A
11	Turbine speed inductive sensor, signal output, testing electrical system, TCC		AD25.40-W-6000-15A
12	Engine speed inductive sensor, signal output, testing electrical system, TCC		AD25.40-W-6000-16A
13	Control module ground from kick-down relay, testing electrical system, TCC		AD25.40-W-6000-08A
14	Kick-down switch, testing electrical system, TCC		AD25.40-W-6000-09A
15	Kick-down relay, testing electrical system, TCC		AD25.40-W-6000-17A
16	Engine management solenoid valve, testing electrical system, TCC		AD25.40-W-6000-11A
17	Clutch booster switch, testing electrical system, TCC		AD25.40-W-6000-12A
18	Control module, turbine speed signal simulation, testing electrical system, TCC		AD25.40-W-6000-18A

Referenced documents

ad0000w2001a Explanation of symbols diagnostics
ad0000w2004a Diagnosis sequence
ad0000w2010a Electronic systems diagnosis, advanced information, general
ad2540w2000a Torque converter clutch (WSK) diagnosis previous knowledge
ad2540w3000a Torque converter clutch (WSK) diagnosis operational check
ad2540w600001a WSK test of electrical system control unit voltage supply
ad2540w600002a TCC test of electrical system pilot control valve relay voltage supply working circuit
ad2540w600003a TCC test of electrical system indicator lamp
ad2540w600004a WSK test of electrical system torque converter lockup clutch pilot control valve
ad2540w600005a TCC test of electrical system turbine speed inductive sensor
ad2540w600006a WSK test of electrical system engine speed inductive sensor
ad2540w600007a TCC test of electrical system lockup clutch
ad2540w600008a WSK test of electrical system control unit ground from kickdown relay
ad2540w600009a WSK test of electrical system kickdown switch
ad2540w600010a WSK test of electrical system pilot control valve relay working circuit
ad2540w600011a WSK test of electrical system engine control solenoid valve
ad2540w600012a WSK test of electrical system clutch servo unit switch
ad2540w600013a TCC test of electrical system indicator lamp actuation at control unit
ad2540w600014a WSK test of electrical system pilot control valve relay working contacts
ad2540w600015a TCC test of electrical system turbine speed inductive sensor signal output
ad2540w600016a WSK test of electrical system engine speed inductive sensor signal output
ad2540w600017a WSK test of electrical system kickdown relay
ad2540w600018a WSK test of electrical system turbine speed signal simulation control unit
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.