Steering Pad Switch Circuit [08/2014 - ]: Procedure
- CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH SIGNAL)
- Disconnect the H140 radio receiver assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition H140-30 (SW1) - H140-32 (SWG) No switch pushed 95 to 105 kΩ Seek+ switch pushed Below 2.5 Ω Seek- switch pushed 313 to 345 Ω Volume+ switch pushed 950 to 1050 Ω Volume- switch pushed 2955 to 3265 Ω H140-31 (SW2) - H140-32 (SWG) No switch pushed 95 to 105 kΩ MODE switch pushed Below 2.5 Ω On hook switch pushed 313 to 345 Ω Off hook switch pushed 950 to 1050 Ω Voice switch pushed 2955 to 3265 Ω
Result: OK
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
(See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] )
Result: NG
NG
See step 2
- INSPECT STEERING PAD SWITCH ASSEMBLY
- Remove the steering pad switch assembly (See article. Refer to REMOVAL [08/2014 - ] ).
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Switch Condition Specified Condition 11 (AU1) - 8 (EAU) No switch pushed 95 to 105 kΩ Seek+ switch pushed Below 2.5 Ω Seek- switch pushed 313 to 345 Ω Volume+ switch pushed 950 to 1050 Ω Volume- switch pushed 2955 to 3265 Ω 10 (AU2) - 8 (EAU) No switch pushed 95 to 105 kΩ MODE switch pushed Below 2.5 Ω On hook switch pushed 313 to 345 Ω Off hook switch pushed 950 to 1050 Ω Voice switch pushed 2955 to 3265 Ω TEXT IN ILLUSTRATION*a Component without harness connected
(Steering Pad Switch Assembly)*b MODE *c Volume+ *d Volume- *e Seek+ *f Seek- *g Voice *h Off hook *i On hook - -
Result: NG
NG
REPLACE STEERING PAD SWITCH ASSEMBLY
(See article. Refer to REMOVAL [08/2014 - ] )
Result: OK
OK
See step 3
- INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY
- Remove the spiral cable with sensor sub-assembly (See article. Refer to REMOVAL [08/2014 - ] ).
- Measure the resistance according to the value(s) in the table below.TEXT IN ILLUSTRATION
*a Component without harness connected
(Spiral Cable with Sensor Sub-assembly)*b Steering Pad Switch Assembly Side *c Vehicle Side - - Standard Resistance
Tester Connection Condition Specified Condition z4-8 (EAU) - H30-3 (EAU) Center 3 Ω or less 2.5 rotations to the left 2.5 rotations to the right z4-11 (AU1) - H30-6 (AU1) Center 3 Ω or less 2.5 rotations to the left 2.5 rotations to the right z4-10 (AU2) - H30-5 (AU2) Center 3 Ω or less 2.5 rotations to the left 2.5 rotations to the right - After setting the spiral cable with sensor sub-assembly to the center position, rotate the spiral cable with sensor sub-assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition z4-8 (EAU) - H30-3 (EAU) Always 3 Ω or less z4-11 (AU1) - H30-6 (AU1) Always 3 Ω or less z4-10 (AU2) - H30-5 (AU2) Always 3 Ω or less NOTE:- Press and hold the lock located in the center of the spiral cable with sensor sub-assembly to rotate the spiral cable with sensor sub-assembly.
- The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may prevent the airbag from deploying.
- As the spiral cable with sensor sub-assembly may break, do not rotate the spiral cable with sensor sub-assembly more than the specified amount.
Result: OK
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)
Result: NG
NG
REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY
(See article. Refer to REMOVAL [08/2014 - ] )