Inspection Procedure
- SYSTEM CHECK
- Turn the light control switch to the TAIL or HEAD position.
Check if other displays or indicators such as the A/C switch indicator come on.
OK: Other displays or indicators come on.
NG: GO TO LIGHTING SYSTEM
OK: GO TO NEXT STEP.
- Turn the light control switch to the TAIL or HEAD position.
- CHECK HARNESS AND CONNECTOR (RH R/B - RADIO RECEIVER)
- Disconnect the radio receiver R19 or R3 connector.
- Measure the voltage according to the values in the table below.
Standard voltage
RH R/B - RADIO RECEIVERTester Connection Condition Specified Condition ILL+ (R19-2) - Body ground ((1)) Light control switch TAIL 10 to 14 V ILL+ (R3-10) - Body ground ((2)) Light control switch TAIL 10 to 14 V (1) Separate Type Amplifier (2) Built-in Type Amplifier Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER - RH R/B (USA) OR COMBINATION SW (CANADA))
OK: GO TO NEXT STEP.
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - LIGHT CONTROL RHEOSTAT)
- Disconnect the radio receiver R19 or R4 connector and light control rheostat R7 connector.
- Measure the resistance according to the values in the table below. Standard:
Standard resistance
RADIO RECEIVER - LIGHT CONTROL RHEOSTATTester Connection Specified Condition ILL- (R19-12) - ILL+ (R7-1) ((1)) Below 1 Ω ILL- (R19-12) - Body ground ((1)) 10 kΩ or higher ILL- (R4-5) - ILL+ (R7-1) ((2)) Below 1 Ω ILL- (R4-5) - Body ground ((2)) 10 kΩ or higher (1) Separate Type Amplifier (2) Built-in Type Amplifier Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE