Lexus ES: Inspection
INSPECTION
PROCEDURE
1. INSPECT STEERING PAD SWITCH ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
| *a | Component without harness connected (Steering Pad Switch Assembly) | *b | Up |
| *c | Down | *d | Right |
| *e | Left | *f | OK |
| *g | Back | *h | On/off Hook |
| *i | Voice | *j | Volume+ |
| *k | Volume- | *l | Seek+ |
| *m | Seek- | *n | MODE |
| *o | +RES | *p | -SET |
| *q | Cruise Control Main | *r | CANCEL |
| *s | Distance Control | *t | Lane Departure Alert |
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 3 (AU1) - 10 (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 | |
| 9 (AU2) - 10 (EAU) | No switch pushed | 95 to 105 kΩ |
| MODE switch pushed | Below 2.5 Ω | |
| On/off hook switch pushed | 950 to 1050 Ω | |
| Voice switch pushed | 2955 to 3265 Ω | |
| 5 (+DP2) - 10 (EAU) | No switch pushed | 95 to 105 kΩ |
| Left switch pushed | Below 2.5 Ω | |
| Up switch pushed | 313 to 345 Ω | |
| Down switch pushed | 950 to 1050 Ω | |
| Right switch pushed | 2955 to 3265 Ω | |
| 4 (+DP) - 10 (EAU) | No switch pushed | 95 to 105 kΩ |
| OK switch pushed | Below 2.5 Ω | |
| Back switch pushed | 313 to 345 Ω | |
| 8 (DIST) - 12 (ECC) | No switch pushed | 1 MΩ or higher |
| Distance control switch pushed | Below 2.5 Ω | |
| Lane departure alert switch pushed | 228 to 252 Ω | |
| 2 (CCS) - 12 (ECC) | No switch pushed | 1 MΩ or higher |
| Cruise control main switch pushed | Below 2.5 Ω | |
| CANCEL switch pushed | 228 to 252 Ω | |
| +RES switch pushed | 599 to 661 Ω | |
| -SET switch pushed | 1463 to 1617 Ω |
HINT:
If the result is not as specified, replace the steering pad switch assembly.
(b) Check the illumination.
(1) Connect a positive (+) lead from the auxiliary battery to terminal 1 (ILL+2) and a negative (-) lead to terminal 6 (ILL-2) of the steering pad switch assembly connector.
(2) Check that the steering pad switch assembly illumination illuminates.
OK:
The steering pad switch assembly illumination illuminates.
HINT:
If the result is not as specified, replace the steering pad switch assembly.
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PRECAUTION HANDLING PRECAUTIONS FOR STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement may affect the performance of the steering system and result in a driving hazard.
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