Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Inspection

INSPECTION

PROCEDURE

1. INSPECT HV BATTERY JUNCTION BLOCK ASSEMBLY

(a) Inspect SMRB:

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

Component without harness connected

(HV Battery Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
y5-1 (+) - S2-1 (CBI)	Auxiliary battery voltage not applied between terminals K18-1 (SMRB) and K18-3 (GND)	10 kΩ or higher
y5-1 (+) - S2-1 (CBI)	Auxiliary battery voltage applied between terminals K18-1 (SMRB) and K18-3 (GND)	Below 1 Ω

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K18-1 (SMRB) - K18-3 (GND)	-40 to 80°C (-40 to 176°F)	25.0 to 59.0 Ω

If the result is not as specified, replace the HV battery junction block assembly.

(b) Inspect SMRG:

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

Component without harness connected

(HV Battery Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
y3-1 (-) - S3-1 (CEI)	Auxiliary battery voltage not applied between terminals K18-4 (SMRG) and K18-3 (GND)	10 kΩ or higher
y3-1 (-) - S3-1 (CEI)	Auxiliary battery voltage applied between terminals K18-4 (SMRG) and K18-3 (GND)	Below 1 Ω

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K18-4 (SMRG) - K18-3 (GND)	-40 to 80°C (-40 to 176°F)	25.0 to 59.0 Ω

If the result is not as specified, replace the HV battery junction block assembly.

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

Component without harness connected

(HV Battery Junction Block Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
y3-1 (-) - S3-1 (CEI)	Auxiliary battery voltage not applied between terminals K18-2 (SMRP) and K18-3 (GND)	10 kΩ or higher
y3-1 (-) - S3-1 (CEI)	Auxiliary battery voltage applied between terminals K18-2 (SMRP) and K18-3 (GND)	24.3 to 29.7 Ω

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K18-2 (SMRP) - K18-3 (GND)	-40 to 80°C (-40 to 176°F)	140 to 290 Ω

If the result is not as specified, replace the HV battery junction block assembly.

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Front Camera System(for Hv Model): Lost Communication with Driving Support ECU (U1104)
DESCRIPTION The forward recognition camera communicates with the driving support ECU assembly via CAN communication. If there is a communication error with the driving support ECU assembly, the forward recognition camera store DTC U1104. DTC No. Detection Item DTC Detection Condition Trouble Area U1 ...

Toyota Avalon (XX50) 2019-2022 Owners Manual