A/T

DTC P1702 - AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT LOW INPUT

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How To Clear Diagnostic Trouble Codes.

Wiring Diagram:

WIRING DIAGRAM

11DB1: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.

1. Turn ignition switch to ON.

Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:

2. Measure voltage between ECM and chassis ground.

CHECK: Is the voltage less than 1 V?

YES: Go to step 11DB2.

NO: Even if MIL lights up, the circuit has returned to a normal condition at this time.

NOTE: In this case, repair the following:
- Poor contact in ECM connector
- Poor contact in TCM connector

11DB2: CHECK HARNESS BETWEEN ECM AND TCM CONNECTOR.

1. Turn ignition switch to OFF.
2. Disconnect connector from ECM and TCM.

Connector & Terminal - [(B135) No.4 - Chassis Ground]:

3. Measure resistance of harness between ECM and chassis ground.

CHECK: Is the resistance less than 10 Ohms?

YES: Repair ground short circuit in harness between ECM and TCM connector.

NO: Go to step 11DB3.

11DB3: CHECK OUTPUT SIGNAL FOR ECM.

1. Connect connector to ECM.
2. Turn ignition switch to ON.

Connector & Terminal - [(B135) No.4 (+) - Chassis Ground (-)]:

3. Measure voltage between ECM and chassis ground.

CHECK: Is the voltage more than 5 V?

YES: Go to step 11DB4.

NO: Repair poor contact in ECM connector.

11DB4: CHECK TROUBLE CODE FOR AUTOMATIC TRANSMISSION.
Read trouble code for automatic transmission.

CHECK: Does trouble code appear for automatic transmission?

YES: Inspect trouble code for automatic trans- mission.

NO: Replace TCM.