Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) diagnostic system check-transmission controls".
1) Connect the scan tool.
2) Turn OFF the ignition switch for 30 seconds or more.
3) Start the engine and operate the vehicle.
4) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to Transmission fluid temperature sensor 1 signal circuit voltage check.
No
Go to Intermittent conditions of automatic transmission.
Refer to "206.Transmission, Transaxle 19D.Symptom(AWR6B45) Intermittent conditions of automatic transmission".
1) Turn OFF the ignition switch.
2) Disconnect the transmission internal harness connector (E42).
3) Turn ON the ignition switch.
4) Measure the voltage between the transmission fluid temperature sensor 1 signal circuit of the transmission internal harness (pin 3 of E42) and the body ground with a DMM.
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Value: 4.5 to 5.5 V
The reading is less than the specified value.
=>Go to Inspection for open circuit in transmission fluid temperature sensor 1 signal circuit.
The reading is within the specified range.
=>Go to Transmission fluid temperature sensor 1 low reference circuit voltage check.
The reading is more than the specified value.
1) Measure the voltage between the transmission fluid temperature sensor 1 signal circuit and the low reference circuit of the transmission internal harness (pins 3 and 4 of E42) with a DMM. Is the voltage more than or equal to the specified value?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Value: 4.5 V
Yes
=>Go to Inspection of transmission internal harness connector.
No
1) Inspect the transmission fluid temperature sensor 1 signal circuit between the TCM (pin 23 of E5) and the transmission internal harness (pin 3 of E42) for a short to the power supply circuit. Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the circuit as necessary.
1) Inspect the transmission fluid temperature sensor 1 signal circuit between the TCM (pin 23 of E5) and the transmission internal harness (pin 3 of E42) for an open circuit or high resistance. Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to TCM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect the transmission fluid temperature sensor 1 low reference circuit between the TCM (pin 24 of E5) and the transmission internal harness (pin 4 of E42) for an open circuit or high resistance. Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to TCM harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the transmission internal harness connector (pins 3 and 4 of E42). Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Inspection of transmission internal harness.
No
Repair the connections as necessary.
1) Inspect the circuit between the transmission internal harness (pins 3 and 4 of E42) and transmission fluid temperature sensor 1 for an open circuit or high resistance. Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
Replace the transmission internal harness.
Refer to "5.Transmission, Transaxle 5B.Automatic(AWR6B45) transmission disassembly".
Refer to "5.Transmission, Transaxle 5B.Automatic(AWR6B45) transmission reassembly".
No
Repair the circuit as necessary.
1) Inspect for poor connections at the TCM harness connector (pins 23 and 24 of E5). Is the result normal?
Refer to "LHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Automatic Transmission" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
No
Repair the connections as necessary.
Note
Refer to "5.Transmission, Transaxle 5Z.Transmission Electrical Control(AWR6B45) TCM removal".
Refer to "5.Transmission, Transaxle 5Z.Transmission Electrical Control(AWR6B45) TCM installation".
Refer to "5.Transmission, Transaxle 5Z.Transmission Electrical Control(AWR6B45) TCM setting".
Procedure completion
1) Clear the DTC with a scan tool.
Note
2) Turn OFF the ignition switch for 30 seconds or more.
3) Start the engine and operate the vehicle.
4) Observe the DTC information with a scan tool.