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DTC Diagnosis Procedure
1.CHECK THE BATTERY CABLE
  1. Turn ignition switch OFF.
  2. Check the battery cable for tightening enough.
noteCheck the continuity between the battery cable and the battery terminal.
Is the inspection result normal?
Repair or replace battery cable connection.
 
2.CHECK ECM INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
Is the inspection result normal?
.
Repair or replace ECM connection.
 
3.CHECK FUSE
Check that the following fuse is not blowing.
LocationFuse No.Capacity
IPDM E/R#765 A
#7915 A
Fuse and fusible link box 2#10015 A
Is the fuse blown (open)?
Replace the fuse after repairing the applicable circuit. (If the replaced fuse is blown again, check the power supply circuit upstream of IPDM E/R or battery power supply circuit.)
.
 
4.CHECK GROUND CONNECTION
  1. Turn ignition switch OFF.
  2. Check ground connection E9. Refer to Circuit Inspection.
Is the inspection result normal?
.
Repair or replace ground connection.
 
5.CHECK ECM GROUND CIRCUIT
  1. Disconnect ECM harness connectors.
  2. Check the continuity between ECM harness connector and ground.
    ECMGroundContinuity
    ConnectorTerminal
    F514GroundExisted
    E16156
    157
    160
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
6.CHECK ECM POWER SUPPLY (MAIN)-1
  1. Reconnect ECM harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between ECM harness connector terminals.
    ECMVoltage
    +−
    ConnectorTerminalConnectorTerminal
    F515E16160Battery voltage
    E16153
Is the inspection result normal?
.
.
 
7.CHECK ECM POWER SUPPLY (MAIN)--2
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Check the voltage between ECM harness connector terminals as per the following.
    ECMConditionVoltage
    (Approx.)
    +−
    ConnectorTerminalConnectorTerminal
    F515E16160After turning ignition switch OFF, battery voltage will exist for a few secondsDrop to 0 V
    E16153
Is the inspection result normal?
.
.
 
8.CHECK ECM POWER SUPPLY (MAIN) CIRCUIT-1
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connectors.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.
    +−Continuity
    ECMIPDM E/R
    ConnectorTerminalConnectorTerminal
    F515F3573Existed
    E16153
  5. Also check harness for short to ground.
Is the inspection result normal?
Perform the trouble diagnosis for IPDM E/R power supply circuit.
Repair or replace error-detected parts.
 
9.CHECK ECM RELAY CONTROL SIGNAL
Check the voltage between ECM harness connector terminals as per the following.
ECMConditionVoltage
(Approx.)
+−
ConnectorTerminalConnectorTerminal
F5124E16160Ignition switch ON 0 V
Turn ignition switch OFF and wait at least 10 seconds.Battery voltage
Is the inspection result normal?
Check Intermittent Incident. Refer to Intermittent IncidentIntermittent Incident.
.
 
10.CHECK ECM RELAY CONTROL SIGNAL CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.
    +−Continuity
    ECMIPDM E/R
    ConnectorTerminalConnectorTerminal
    F5124F4293Existed
  5. Also check harness for short to ground and to power.
Is the inspection result normal?
Replace IPDM E/R. Refer to Removal and Installation.
Repair or replace error-detected parts.
 
11.CHECK IGNITION SWITCH SIGNAL
  1. Turn ignition switch ON.
  2. Check the voltage between ECM harness connector terminals.
    ECMConditionVoltage
    (Approx.)
    Connector+−
    Terminal
    E16141160Ignition switch OFF0 V
    Ignition switch ONBattery voltage
Is the inspection result normal?
.
.
 
12.CHECK IGNITION SWITCH SIGNAL CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between ECM harness connector and IPDM E/R harness connector.
    +−Continuity
    ECMIPDM E/R
    ConnectorTerminalConnectorTerminal
    E16141E12019Existed
  5. Also check harness for short to ground and to power.
Is the inspection result normal?
Perform the trouble diagnosis for IPDM E/R power supply circuit.
Repair or replace error-detected parts.
 
13.CHECK ECM POWER SUPPLY (BACK-UP)
Check the voltage between ECM harness connector terminals.
ECMVoltage
+−
ConnectorTerminalConnectorTerminal
F5266E16160Battery voltage
Is the inspection result normal?
Check Intermittent Incident. Refer to Intermittent IncidentIntermittent Incident.
Perform the trouble diagnosis for battery power supply circuit.