Inspection Procedure
WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Turn the ignition switch OFF before measuring the resistances of the main wire and the branch wire.
- After the ignition switch is turned OFF, check that the key reminder warning system and light reminder warning system are not in operation.
- Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
- CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE)
- Disconnect the E37*1 or E36*2 air conditioning amplifier connector.
HINT:
- *1: for Automatic air conditioning system.
- *2: for Manual air conditioning system.
- Measure the resistance of the wire harness side connector.
Standard resistance:
for Automatic Air Conditioning System
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition E37-11 (CANH) - E37-12 (CANL) Ignition switch OFF 54 to 69 Ω for Manual Air Conditioning System
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition E36-8 (CANH) - E36-9 (CANL) Ignition switch OFF 54 to 69 Ω
NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (CANH, CANL)
OK: Go to next step.
- Disconnect the E37*1 or E36*2 air conditioning amplifier connector.
- CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND)
- Disconnect the E37*1 or E36*2 air conditioning amplifier connector.
HINT:
- *1: for Automatic air conditioning system.
- *2: for Manual air conditioning system.
- Measure the resistance of the wire harness side connectors.
Standard resistance:
for Automatic Air Conditioning System
RESISTANCE SPECIFICATIONTester Connection Specified Condition E37-14 (GND) - Body ground Below 1 Ω for Manual Air Conditioning System
RESISTANCE SPECIFICATIONTester Connection Specified Condition E36-24 (GND) - Body ground Below 1 Ω - Measure the voltage of the wire harness side connector.
Standard voltage:
for Automatic Air Conditioning System
VOLTAGE SPECIFICATIONTester Connection Condition Specified Condition E37-21 (B) - Body ground Always 10 to 14 V E37-1 (IG+) - Body ground Ignition switch ON 10 to 14 V for Manual Air Conditioning System
VOLTAGE SPECIFICATIONTester Connection Condition Specified Condition E36-14 (IG+) - Body ground Ignition switch ON 10 to 14 V
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER
- Disconnect the E37*1 or E36*2 air conditioning amplifier connector.