Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Window / Glass / Window Defogger System / Terminals Of Ecu

TERMINALS OF ECU

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMMT Made)

(a) Disconnect the F72 air conditioning amplifier assembly connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
F72-5 (IG+) - F72-29 (GND)	B - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
F72-5 (IG+) - F72-29 (GND)	B - W-B	Power source (IG)	Ignition switch off	Below 1 V
F72-1 (B) - F72-29 (GND)	V - W-B	Battery power supply	Always	11 to 14 V
F72-29 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
F72-26 (RDFG) - F72-29 (GND)	P - W-B	Rear window defogger signal	Ignition switch ON, rear window defogger switch off	11 to 14 V
F72-26 (RDFG) - F72-29 (GND)	P - W-B	Rear window defogger signal	Ignition switch ON, rear window defogger switch on	Below 1 V
F72-3 (LIN1) - F72-29 (GND)	L - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the air conditioning amplifier assembly may be malfunctioning.

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for TMC Made)

(a) Disconnect the F139 air conditioning amplifier assembly connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
F139-2 (IG+) - F139-4 (GND)	B - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
F139-2 (IG+) - F139-4 (GND)	B - W-B	Power source (IG)	Ignition switch off	Below 1 V
F139-1 (B) - F139-4 (GND)	V - W-B	Battery power supply	Always	11 to 14 V
F139-4 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
F139-5 (RDFG) - F139-4 (GND)	P - W-B	Rear window defogger signal	Ignition switch ON, rear window defogger switch off	11 to 14 V
F139-5 (RDFG) - F139-4 (GND)	P - W-B	Rear window defogger signal	Ignition switch ON, rear window defogger switch on	Below 1 V
F139-14 (LIN1) - F139-4 (GND)	BE - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the air conditioning amplifier assembly may be malfunctioning.

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Switch Condition	Specified Condition
F61-2 (LIN1) - F61-16 (GND)	L - W-B1 BE - W-B2	LIN communication line	Ignition switch ON	Pulse generation

Tester Connection

Wiring Color

Terminal Description

Switch Condition

Specified Condition

F61-2 (LIN1) - F61-16 (GND)

L - W-B*1

BE - W-B*2

LIN communication line

Ignition switch ON

Pulse generation

*1: for TMMT Made
*2: for TMC Made

If the result is not as specified, the air conditioning control assembly may be malfunctioning.

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