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 and warm up the engine.
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. 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.
No
=>Go to Inspection for short to ground in transmission fluid temperature sensor 1 signal circuit.
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 ground or a short to the low reference 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 signal circuit between the transmission internal harness (pin 3 of E42) and transmission fluid temperature sensor 1 for a short to ground or a short to the low reference 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
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.
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 and warm up the engine.
4) Observe the DTC information with a scan tool.