CAN COMMUNICATION SYSTEM ECM Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
ECM Communication Stop Mode	Either condition is met: "ECM (Engine)" is not displayed on "Bus Check". "ECM Communication Stop Mode" in "DTC Combination Table" applies.	Power source or inside ECM ECM

Detection Item

Symptom

Trouble Area

ECM Communication Stop Mode

Either condition is met:

"ECM (Engine)" is not displayed on "Bus Check".
"ECM Communication Stop Mode" in "DTC Combination Table" applies.

Power source or inside ECM
ECM

WIRING DIAGRAM

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)

for 1KD-FTV (w/ DPF)

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B73-32 (EC) - Body ground	Always	Below 1 Ω
D99-44 (E02) - Body ground	Always	Below 1 Ω
D99-45 (E01) - Body ground	Always	Below 1 Ω
D99-109 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B73-2 (BATT) - Body ground	Always	11 to 14 V
B73-1 (+B) - Body ground	Battery positive (+) voltage applied to terminal B73-45 (MREL)	11 to 14 V
B73-20 (+B2) - Body ground	Battery positive (+) voltage applied to terminal B73-45 (MREL)	11 to 14 V
B73-25 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

for 1KD-FTV (w/o DPF)

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B72-32 (EC) - Body ground	Always	Below 1 Ω
D98-44 (E02) - Body ground	Always	Below 1 Ω
D98-45 (E01) - Body ground	Always	Below 1 Ω
D98-109 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B72-2 (BATT) - Body ground	Always	11 to 14 V
B72-1 (+B) - Body ground	Battery positive (+) voltage applied to terminal B72-45 (MREL)	11 to 14 V
B72-20 (+B2) - Body ground	Battery positive (+) voltage applied to terminal B72-45 (MREL)	11 to 14 V
B72-25 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

for 2KD-FTV

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B88-32 (EC) - Body ground	Always	Below 1 Ω
D105-44 (E02) - Body ground	Always	Below 1 Ω
D105-45 (E01) - Body ground	Always	Below 1 Ω
D105-109 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B88-2 (BATT) - Body ground	Always	11 to 14 V
B88-1 (+B) - Body ground	Battery positive (+) voltage applied to terminal B88-28 (MREL)	11 to 14 V
B88-25 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

for 1TR-FE, 2TR-FE (w/ Dual VVT-i)

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B94-32 (EC) - Body ground	Always	Below 1 Ω
D116-58 (E02) - Body ground	Always	Below 1 Ω
D116-57 (E01) - Body ground	Always	Below 1 Ω
D116-59 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B94-1 (BATT) - Body ground	Always	11 to 14 V
B94-2 (+B) - Body ground	Battery positive (+) voltage applied to terminal B94-46 (MREL)	11 to 14 V
B94-3 (+B2) - Body ground	Battery positive (+) voltage applied to terminal B94-46 (MREL)	11 to 14 V
B94-6 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

for 2TR-FE (w/o Dual VVT-i)

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B71-32 (EC) - Body ground	Always	Below 1 Ω
D97-45 (E02) - Body ground	Always	Below 1 Ω
D97-46 (E01) - Body ground	Always	Below 1 Ω
D97-105 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B71-20 (BATT) - Body ground	Always	11 to 14 V
B71-2 (+B) - Body ground	Battery positive (+) voltage applied to terminal B71-44 (MREL)	11 to 14 V
B71-27 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

for 5L-E

Disconnect the ECM connectors.

Text in Illustration
*a	Front view of wire harness connector (to ECM)	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B74-50 (EC) - Body ground	Always	Below 1 Ω
D100-44 (E02) - Body ground	Always	Below 1 Ω
D100-45 (E01) - Body ground	Always	Below 1 Ω
D100-109 (E1) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
B74-2 (BATT) - Body ground	Always	11 to 14 V
B74-1 (+B) - Body ground	Battery positive (+) voltage applied to terminal B74-5 (MREL)	11 to 14 V
B74-25 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

Tech Tips

*: Replacement procedure:

for 1KD-FTV Click here.
for 2KD-FTV Click here.
for 1TR-FE Click here.
for 2TR-FE (w/o Dual VVT-i) Click here.
for 2TR-FE (w/ Dual VVT-i) Click here.
for 5L-E Click here.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM*