DTC DETECTING CONDITION: Immediately at fault recognition TROUBLE SYMPTOM: • Excessive shift shock • Shift characteristics malfunction 1. ENGINE TYPE FB WIRING DIAGRAM: CVT control system CVT Control System > WIRING DIAGRAM 
| STEP | CHECK | YES | NO | 1.CHECK HARNESS. 1) Turn the ignition switch to OFF. 2) Disconnect the TCM connector. 3) Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (T10) No. 1 — Chassis ground: (T10) No. 6 — Chassis ground: | Is the resistance 1 M- or more- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | 2.CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. 1) Remove the transmission valve cover. 2) Check for the harness pinch, damage. | Is there any fault in the harness- | Replace the transmission harness. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | 3.CHECK ATF TEMPERATURE SENSOR. Measure the resistance between TCM connectors. NOTE: Perform the measurements using multiple oil temperatures. | Is resistance as follows-
Fluid temperature 0°C > Approx. 6.0 k-
Fluid temperature 20°C > Approx. 2.5 k-
Fluid temperature 80°C > Approx. 330 - | Replace the TCM. Transmission Control Module (TCM) | Replace the control valve body. Control Valve Body |
2. ENGINE TYPE EZ WIRING DIAGRAM: CVT control system CVT Control System > WIRING DIAGRAM 
| STEP | CHECK | YES | NO | 1.CHECK HARNESS. 1) Turn the ignition switch to OFF. 2) Disconnect the TCM connector. 3) Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 1 — Chassis ground: (B54) No. 6 — Chassis ground: | Is the resistance 1 M- or more- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | 2.CHECK HARNESS. 1) Disconnect the transmission connector. 2) Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 16 — Transmission body: (T4) No. 19 — Transmission body: | Is the resistance 1 M- or more- | Repair the short circuit of body harness. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | 3.CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. 1) Remove the transmission oil pan. 2) Check for the harness pinch, damage. | Is there any fault in the harness- | Replace the transmission harness. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW | 4.CHECK ATF TEMPERATURE SENSOR. Measure the resistance between transmission connector terminals. NOTE: Perform the measurements using multiple oil temperatures. | Is resistance as follows-
Fluid temperature 0°C > Approx. 6.2 k-
Fluid temperature 20°C > Approx. 2.6 k-
Fluid temperature 80°C > Approx. 370 - | Replace the TCM. Transmission Control Module (TCM) | Replace the control valve body. Control Valve Body |
3. OUTLINE OF DIAGNOSIS (ENGINE TYPE FB) • Detect the ground short circuit of oil temperature sensor. • Judge as NG if the voltage detected by the oil temperature sensor is lower than the predetermined value. 4. EXECUTION CONDITION (ENGINE TYPE FB) Secondary Parameters | Execution condition | 12 V battery system voltage | ≥ 9 V |
5. DIAGNOSTIC METHOD (ENGINE TYPE FB) If the duration of time while the following conditions are met is longer than the time indicated, judge as NG. Judgment ValueMalfunction Criteria | Threshold Value | Measured Transmission fluid temperature sensor input voltage | < 0.117 V | (Transmission fluid temperature) | (> 146 degC) | Time Needed for Diagnosis: 1 second Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs. 6. OUTLINE OF DIAGNOSIS (ENGINE TYPE EZ) • Detect the ground short circuit of oil temperature sensor. • Judge as NG if the voltage detected by the oil temperature sensor is lower than the predetermined value. 7. EXECUTION CONDITION (ENGINE TYPE EZ) Secondary Parameters | Execution condition | 12 V battery system voltage | ≥ 9 V |
8. DIAGNOSTIC METHOD (ENGINE TYPE EZ) If the duration of time while the following conditions are met is longer than the time indicated, judge as NG. Judgment ValueMalfunction Criteria | Threshold Value | Measured Transmission fluid temperature sensor input voltage | < 0.132 V | (Transmission fluid temperature) | (> 150 degC) | Time Needed for Diagnosis: 1 second Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs. | 
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