On-Vehicle Inspection

WARNING: This page is about a different car, the 2007 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TURN SIGNAL FLASHER OPERATION

Power source circuit and ground circuit inspection.

Remove the turn signal flasher relay from the junction block.

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

Standard voltage

TESTER CONNECTION - SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1 - Body ground	Power switch ON	10 to 14 V
4 - Body ground	Always	10 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

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

Standard resistance

Fig 1: Identifying Turn Signal Flasher Relay Location

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION - SPECIFIED CONDITION

Tester Connection	Specified Condition
7 - Body ground	Below 1

If the result is not as specified, there may be a malfunction on the wire harness side.

Output operation signal inspection.

Install the turn signal flasher relay to the driver side panel junction block.

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

Fig 2: Identifying Instrument Panel Junction Block Connector Terminals

Standard voltage

TESTER CONNECTION - SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1A-14 - Body ground	Hazard warning switch OFF	Below 1 V
1A-14 - Body ground	Hazard warning switch ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1A-14 - Body ground	Turn signal switch (left turn) OFF	Below 1 V
1A-14 - Body ground	Turn signal switch (left turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1A-31 - Body ground	Hazard warning switch OFF	Below 1 V
1A-31 - Body ground	Hazard warning switch ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1A-31 - Body ground	Turn signal switch (right turn) OFF	Below 1 V
1A-31 - Body ground	Turn signal switch (right turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1D-27 - Body ground	Hazard warning signal OFF	Below 1 V
1D-27 - Body ground	Hazard warning signal ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1D-27 - Body ground	Turn signal switch (left turn) OFF	Below 1 V
1D-27 - Body ground	Turn signal switch (left turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1D-28 - Body ground	Hazard warning signal OFF	Below 1 V
1D-28 - Body ground	Hazard warning signal ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1D-28 - Body ground	Turn signal switch (right turn) OFF	Below 1 V
1D-28 - Body ground	Turn signal switch (right turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1L-11 - Body ground	Turn signal switch (left turn) OFF	Below 1 V
1L-11 - Body ground	Turn signal switch (left turn) ON	Above 9 V
1L-12 - Body ground	Turn signal switch (right turn) OFF	Below 1 V
1L-12 - Body ground	Turn signal switch (right turn) ON	Above 9 V
1L-13 - Body ground	Hazard warning switch OFF	Below 1 V
1L-13 - Body ground	Hazard warning switch ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1L-13 - Body ground	Turn signal switch (left turn) OFF	Below 1 V
1L-13 - Body ground	Turn signal switch (left turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1L-16 - Body ground	Hazard warning switch OFF	Below 1 V
1L-16 - Body ground	Hazard warning switch ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1L-16 - Body ground	Turn signal switch (right turn) OFF	Below 1 V
1L-16 - Body ground	Turn signal switch (right turn) ON	Alternating between Below 1 V to 9 V (60 to 120 times per minute)
1L-17 - Body ground	Hazard warning switch OFF	Below 1 V
1L-17 - Body ground	Hazard warning switch ON	Above 9 V

If the result is not as specified, the relay may have a malfunction.