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1、U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX81 AX DESCRIPTION Shifting from 1st to 5th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, SL3, S4 and SR, which are controlled by the ECM. If an open or short circuit occurs in any of the shift s
2、olenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated safely (see page AX-35). MONITOR DESCRIPTION The ECM commands gear shifts by turning the shift solenoid valves ON/OFF. When there is an open or short circuit in any shift solenoid valve ci
3、rcuit, the ECM detects the problem and illuminates the MIL and stores the DTC. And the ECM performs the fail-safe function and turns the other normal shift solenoid valves ON/OFF. In case of an open or short circuit, the ECM stops sending current to the circuit (see page AX-35). MONITOR STRATEGY TYP
4、ICAL ENABLING CONDITIONS TYPICAL MALFUNCTION THRESHOLDS COMPONENT OPERATING RANGE DTCP0748 Pressure Control Solenoid “A“ Electrical (Shift Solenoid Valve SL1) DTC No.DTC Detection ConditionTrouble Area P0748Duty cycle to shift solenoid valve SL1 is 100% (1 trip detection logic) Open or short in shif
5、t solenoid valve SL1 circuit Shift solenoid valve SL1 ECM Related DTCsP0748: Shift solenoid valve SL1/Range check Required sensors/ComponentsShift solenoid valve SL1 Frequency of operationContinuous Duration1 sec. MIL operationImmediate Sequence of operationNone The monitor will run whenever this DT
6、C is not present.None Battery voltage10 V or more StarterOFF Ignition switchON Output signal duty100% Output signal dutyLess than 100% AX82 U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX WIRING DIAGRAM INSPECTION PROCEDURE (a)Disconnect the B32 wire connector. (b)Measure the resistance of t
7、he transmission wire. Standard resistance NG OK 1INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL1) ECM SL1+ SL1- SL1+ SL1- Shift Solenoid Valve SL1 (ECT Solenoid Valve) C119177E10 123456 78910111213 SL1- SL1+ Wire Harness Side C136383E03 Tester ConnectionConditionSpecified Condition 6 (SL1+) - 13
8、 (SL1-)20C (68F)5.0 to 5.6 6 (SL1+) - Body ground20C (68F)1 M or higher 13 (SL1-) - Body ground20C (68F)1 M or higher Go to step 3 U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX83 AX (a)Disconnect the B30 ECM connector. (b)Measure the resistance of the wire harness side connector. Standard
9、resistance NG OK (a)Remove the shift solenoid valve SL1. (b)Measure the resistance of the solenoid valve. Standard resistance: 5.0 to 5.6 at 20C (68F) (c)Connect the batterys positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. The
10、n check that the valve moves and makes an operating noise. OK: Valve moves and makes operating noise. NG OK 2CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM) Wire Harness Side SL1+SL1- B30 A107892E71 Tester ConnectionConditionSpecified Condition B30-16 (SL1+) - B30-17 (SL1-) 20C (68F)5.0 to 5.6 B30-16 (
11、SL1+) - Body ground 20C (68F)1 M or higher B30-17 (SL1-) - Body ground 20C (68F)1 M or higher REPAIR OR REPLACE HARNESS AND CONNECTOR REPLACE ECM 3INSPECT SHIFT SOLENOID VALVE SL1 12 12 (-)(+) C140848E01 REPLACE SHIFT SOLENOID VALVE SL1 REPAIR OR REPLACE TRANSMISSION WIRE AX84 U151E AUTOMATIC TRANSA
12、XLE AUTOMATIC TRANSAXLE SYSTEM AX SYSTEM DESCRIPTION The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift sole
13、noid valves, valve body or automatic transaxle (clutch, brake, gear, etc.). MONITOR DESCRIPTION The ECM commands gear shifts by turning the shift solenoid valves ON/OFF. According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the
14、actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC. MONITOR STRATEGY TYPICAL ENABLING CONDITIONS All: DTCP0766 Shift Solenoid “D“ Performance (Shift
15、Solenoid Valve S4) DTC No.DTC Detection ConditionTrouble Area P0766Gear required by the ECM does not match the actual gear when driving (2 trip detection logic) Shift solenoid valve S4 remains open or closed Valve body is blocked Shift solenoid valve S4 Automatic transaxle (clutch, brake, gear, etc.
16、) ECM Related DTCsP0766: Shift solenoid valve S4/OFF malfunction Shift solenoid valve S4/ON malfunction Required sensors/ComponentsShift solenoid valve S4, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE) Frequency of operationContinuous DurationOFF malfunction (A) and ON malfun
17、ction (B) 1 sec. OFF malfunction (B) 1.2 sec. ON malfunction (A) 0.8 sec. MIL operation2 driving cycles Sequence of operationNone The monitor will run whenever these DTCs are not present.P0115 - P0118 (ECT sensor) P0125 (Insufficient ECT for closed loop) P0500 (VSS) P0748, P0778, P0798 (Shift soleno
18、id valve (range) ECT (Engine coolant temperature)10C (50F) or more Transmission range“D“ ATF temperature-20C (-4F) or more ATF temperature sensor circuitNot circuit malfunction ECT sensor circuitNot circuit malfunction Turbine speed sensor circuitNot circuit malfunction Intermediate shaft speed sens
19、or circuitNot circuit malfunction Output speed sensor circuitNot circuit malfunction U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX85 AX OFF malfunction (A): OFF malfunction (B): ON malfunction (A): ON malfunction (B): TYPICAL MALFUNCTION THRESHOLDS Either of the following conditions is met
20、: OFF malfunction (A) and (B), or ON malfunction (A) and (B) 2 detections are necessary per driving cycle: 1st detection: temporary flag ON 2nd detection: pending fault code ON OFF malfunction (A): OFF malfunction (B): ON malfunction (A): ON malfunction (B): INSPECTION PROCEDURE HINT: Performing the
21、 intelligent testers ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST. 1. Warm up the engine. Shift solenoid valve SL1
22、circuitNot circuit malfunction Shift solenoid valve SL2 circuitNot circuit malfunction Shift solenoid valve SL3 circuitNot circuit malfunction Shift solenoid valve S4 circuitNot circuit malfunction Shift solenoid valve SR circuitNot circuit malfunction Shift solenoid valve DSL circuitNot circuit mal
23、function Electronic throttle systemNot circuit malfunction ECM selected gear5th Throttle valve opening angle5% or more Vehicle speed10 km/h (6.2 mph) or more ECM lock-up commandON ECM selected gear3rd, 4th or 5th Throttle valve opening angle10% or more Vehicle speed25 to 100 km/h (15.5 to 62.1 mph)
24、ECM selected gear4th or 5th Throttle valve opening angle4.5% or more at engine speed 1,900 rpm (Varies with engine speed) ECM selected gear4th Throttle valve opening angle5% or more Vehicle speed10 km/h (6.2 mph) or more Intermediate shaft speed/Output speed1.44 to 1.58 Difference between engine spe
25、ed and input (turbine) speedLess than 35 rpm Input (turbine) speed/Intermediate shaft speed0.64 to 0.74 Intermediate shaft speed/Output speed1.02 to 1.16 AX86 U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX 2. Turn the ignition switch OFF. 3. Connect the intelligent tester to the CAN VIM. Th
26、en connect the CAN VIM to the DLC3. 4. Turn the ignition switch ON and turn the tester ON. 5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST. 6. Follow the instructions on the tester and perform the ACTIVE TEST. HINT: While driving, the shift position can be forcibly changed wi
27、th the tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (see page AX-35). ECM: HINT: This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less. The shift position commanded by the ECM is shown in t
28、he DATA LIST/SHIFT display on the tester. (a)Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3. (b)Turn the ignition switch ON and turn the tester ON. (c)Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES. (d)Read the DTCs using the te
29、ster. Result HINT: If any other codes besides P0766 are output, perform troubleshooting for those DTCs first. B A ItemTest DetailsDiagnostic Note SHIFTTest Details Operate the shift solenoid valve and set each shift lever position by yourself Vehicle Condition IDL: ON 50 km/h (31 mph) or less Other
30、information Press “ button: Shift up Press “ button: Shift down Possible to check the operation of the shift solenoid valves 1CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0766) Display (DTC output)Proceed to Only P0766 is outputA P0766 and other DTCs are outputB GO TO DTC CHART U151E AUTOMATIC TRANSA
31、XLE AUTOMATIC TRANSAXLE SYSTEM AX87 AX (a)Remove the shift solenoid valve S4. (b)Measure the resistance between the solenoid valve terminal and solenoid valve body. Standard resistance: 11 to 15 at 20C (68F) (c)Connect the batterys positive (+) lead to the terminal of the solenoid valve connector, a
32、nd the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise. OK: Valve moves and makes operating noise. NG OK (a)Check the transmission valve body assembly. OK: There are no foreign objects on each valve. NG OK (a)Check the torque converter clutch asse
33、mbly (see page AX-178). OK: The torque converter clutch operates normally. NG OK 2INSPECT SHIFT SOLENOID VALVE S4 (+)(-) C113971E02 REPLACE SHIFT SOLENOID VALVE S4 3INSPECT TRANSMISSION VALVE BODY ASSEMBLY REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY 4INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY R
34、EPLACE TORQUE CONVERTER CLUTCH ASSEMBLY REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY AX88 U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX DESCRIPTION The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compare
35、s the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake, gear, etc.). MONITOR DESCRIPTION The ECM commands gear shifts by turning the shift solenoid valves ON/OFF. According to the input
36、shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores
37、 the DTC. MONITOR STRATEGY TYPICAL ENABLING CONDITIONS All: DTCP0771 Shift Solenoid “E“ Performance (Shift Solenoid Valve SR) DTC No.DTC Detection ConditionTrouble Area P0771Gear required by the ECM does not match the actual gear when driving (2 trip detection logic) Shift solenoid valve SR remains
38、open or closed Valve body is blocked Shift solenoid valve SR Automatic transaxle (clutch, brake, gear, etc.) Related DTCsP0771: Shift solenoid valve SR/Rationality check Required sensors/ComponentsShift solenoid valve SR, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE) Frequenc
39、y of operationContinuous DurationOFF malfunction (A) 1 sec. OFF malfunction (B) 3.5 sec. ON malfunction (A) Continuous ON malfunction (B) and (C) 0.8 sec. MIL operation2 driving cycles Sequence of operationNone The monitor will run whenever these DTCs are not present.P0115 - P0118 (ECT sensor) P0125
40、 (Insufficient ECT for closed loop) P0500 (VSS) P0748, P0778, P0798 (Shift solenoid valve (range) ECT (Engine coolant temperature)10C (50F) or more Transmission range“D“ ATF temperature-20C (-4F) or more ATF temperature sensor circuitNot circuit malfunction ECT sensor circuitNot circuit malfunction
41、Turbine speed sensor circuitNot circuit malfunction Intermediate shaft speed sensor circuitNot circuit malfunction Output speed sensor circuitNot circuit malfunction U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX89 AX OFF malfunction (A): OFF malfunction (B): ON malfunction (A): ON malfunct
42、ion (B): ON malfunction (C): ON malfunction (D): TYPICAL MALFUNCTION THRESHOLDS Either of the following conditions is met: OFF malfunction (A) and (B), or ON malfunction (A), (B), (C) and (D) OFF malfunction (A): OFF malfunction (B): ON malfunction (A): ON malfunction (B): ON malfunction (C): ON mal
43、function (D): Shift solenoid valve SL1 circuitNot circuit malfunction Shift solenoid valve SL2 circuitNot circuit malfunction Shift solenoid valve SL3 circuitNot circuit malfunction Shift solenoid valve S4 circuitNot circuit malfunction Shift solenoid valve SR circuitNot circuit malfunction Shift so
44、lenoid valve DSL circuitNot circuit malfunction Electronic throttle systemNot circuit malfunction ECM selected gear5th Throttle valve opening angle5% or more Vehicle speed10 km/h (6.2 mph) or more ECM lock-up commandON ECM selected gear3rd, 4th or 5th Vehicle speed25 km/h (15.5 mph) or more ECM lock
45、-up commandOFF ECM selected gear1st Vehicle speedLess than 40 km/h (24.9 mph) Throttle valve opening angle4.5% or more at engine speed 1,900 rpm (Varies with engine speed) ECM selected gear3rd Throttle valve opening angle4.5% or more at engine speed 1,900 rpm (Varies with engine speed) Duration time
46、 from shift command of ECM15 sec. or more ECM selected gear4th or 5th Intermediate shaft speed/Output speed1.44 to 1.58 Engine speed - Input (turbine) speed75 rpm or more Difference between engine speed and input (turbine) speed150 rpm or more Input (turbine) speed/Intermediate shaft speed0.93 to 1.
47、07 Input (turbine) speed/Intermediate shaft speed0.93 to 1.07 Input (turbine) speed/Intermediate shaft speed0.64 to 0.74 AX90 U151E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX INSPECTION PROCEDURE HINT: Performing the intelligent testers ACTIVE TEST allows relay, VSV, actuator and other items
48、to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST. 1. Warm up the engine. 2. Turn the ignition switch OFF. 3. Connect the intelligent tester to the CAN VIM. Then connect the CA
49、N VIM to the DLC3. 4. Turn the ignition switch ON and turn the tester ON. 5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST. 6. Follow the instructions on the tester and perform the ACTIVE TEST. HINT: While driving, the shift position can be forcibly changed with the tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (see page AX-35). ECM: HINT: This test can be conducted when the vehicle spee