Inspection Procedure

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.

INSPECT FUSE (ACC, ECU-B, ECU-IG)
1. Disconnect the ACC, ECU-B and ECU-IG fuses from the driver side junction block.
2. Measure the resistance of the fuses.
  Standard resistance: Below 1 Ω
NG: REPLACE FUSE

OK: Go to Next Step

CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND BODY GROUND)

Disconnect the M13 display connector.

Measure the resistance and voltage of the wire harness side connector.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Specified Condition
M13-1 (GND1) - Body ground	Below 1 Ω

Standard voltage

VOLTAGE CHART

Tester Connection	Condition	Specified Condition
M13-3 (+B1) - Body ground	Always	10 to 14 V
M13-2 (ACC) - Body ground	Power switch ON (ACC)	10 to 14 V
M13-10 (IG) - Body ground	Power switch ON (IG)	10 to 14 V

Fig 1: Disconnecting M13 Display Connector

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE