Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ECU-B, ECU-IG)
1. Remove the ECU-B fuse from the engine room relay block.
2. Remove the ECU-IG fuse from the main body ECU.
3. Measure the resistance.
  Standard resistance: Below 1 Ω
4. Reinstall the ECU-B and ECU-IG fuses.
NG: REPLACE FUSE

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (FUSE - RUNNING LIGHT RELAY ASSEMBLY)

Disconnect the D9 running light relay assembly connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D9-3 (+B) - Body ground	Always	11 to 14 V
D9-12 (IG) - Body ground	Ignition switch ON	11 to 14 V

Reconnect the running light relay assembly connector.

Fig 1: Identifying Terminals Of D9 Running Light Relay Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY ASSEMBLY - HEAD LIGHT)

Disconnect the D9 running light relay assembly connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D9-1 (DRL) - Body ground	Always	11 to 14 V

Reconnect the running light relay assembly connector.

Fig 2: Identifying Terminals Of D9 Running Light Relay Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY ASSEMBLY - HEAD LIGHT DIMMER SWITCH)

Disconnect the D9 running light relay assembly connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D9-7 (H) - Body ground	Always	11 to 14 V
D9-16 (FOG) -Body ground	Fog light switch ON	11 to 14 V
D9-8 (HI) - Body ground	Light control switch OFF	11 to 14 V

Fig 3: Identifying Terminals Of D9 Running Light Relay Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reconnect the running light relay assembly connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (GENERATOR - RUNNING LIGHT RELAY ASSEMBLY)

Disconnect the D9 running light relay assembly connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
D9-9 (CHG-) - Body ground	Confirm that vehicle Is stopped and engine is Idling	11 to 14 V

Reconnect the running light relay assembly connector.

Fig 4: Identifying Terminals Of D9 Running Light Relay Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY ASSEMBLY - PARKING BRAKE SWITCH)

Disconnect the D9 running light relay assembly connector.
Disconnect the D21 parking brake switch connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
D9-11 (PKB)-D21-1	Below 1 Ω

Reconnect the parking brake switch connector.
Reconnect the running light relay assembly connector.

Fig 5: Identifying Terminals Of D9 Running Light Relay Assembly Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (RUNNING LIGHT RELAY - BODY GROUND)

Disconnect the D9 running light relay assembly connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
D9-2 (E) - Body ground	Below 1 Ω

Reconnect the running light relay assembly connector.

Fig 6: Identifying Terminals Of D9 Running Light Relay Assembly Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE RUNNING LIGHT RELAY ASSEMBLY