Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Heated Seats Schematics Connector End View Reference: Power Seat Connector End Views | ||||||||||
1 | Did you review the Heated Seat System Description and Operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms - Seats | ||||||
2 |
Does the heated seat system operate normally in low and high modes? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Do the low and high switch indicators operate properly? | -- | Go to Step 6 | Go to Step 4 | ||||||
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 17 | ||||||
5 | Connect the test lamp from the ignition voltage supply circuit terminal to the ground circuit terminal in the heated seat switch harness connector. Does the test lamp illuminate? | -- | Go to Step 22 | Go to Step 18 | ||||||
6 |
Does the test lamp illuminate? | -- | Go to Step 12 | Go to Step 7 | ||||||
7 |
Does the test lamp illuminate in the high and low switch positions? | -- | Go to Step 8 | Go to Step 15 | ||||||
8 | Connect a test lamp from the battery voltage supply circuit terminal in the heated seat control module harness connector to ground. Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 19 | ||||||
9 | Connect a test lamp from the battery voltage supply circuit terminal to the ground circuit terminal in the heated seat control module harness connector. Does the test lamp illuminate? | -- | Go to Step 10 | Go to Step 20 | ||||||
10 | Test the resistance from the heated seat thermistor signal circuit terminal to the ground circuit terminal in the heated seat control module harness connector. Is the resistance within the specified values? | 7K-11K ohms | Go to Step 11 | Go to Step 14 | ||||||
11 | Test the resistance through the heated seat switch from the heated seat switch signal circuit terminal to the heated seat switch high/low signal circuit terminal in the heated seat control module harness connector. Is the resistance at or near the specified values? |
| Go to Step 28 | Go to Step 16 | ||||||
12 |
Is the resistance within the specified values? | 0.5-2 ohms | Go to Step 13 | Go to Step 24 | ||||||
13 |
Is the resistance within the specified values? | 0.5-2 ohms | Go to Step 21 | Go to Step 26 | ||||||
14 |
Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 24 | ||||||
15 | Test the heated seat switch signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 22 | ||||||
16 | Test the heated seat switch high/low signal circuit for an open or short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 22 | ||||||
17 | Repair the open or short to ground in the ignition voltage supply circuit to the heated seat switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
18 | Repair the open or high resistance in heated seat switch ground circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
19 | Repair the open or short to ground in the battery voltage supply circuit to the heated seat control module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
20 | Repair the open or high resistance in the heated seat control module ground circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
21 | Repair the open or short to ground in the heater element supply or ground circuits in the seat harness. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 30 | -- | ||||||
22 | Inspect for poor connections at the heated seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 23 | ||||||
23 | Replace the heated seat switch. Refer to Front Seat Heater Switch Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
24 | Inspect for poor connections at the seat cushion heater element. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 25 | ||||||
25 | Replace the seat cushion heater element. Refer to Front Seat Heater Element Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
26 | Inspect for poor connections at the seat back heater element. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 27 | ||||||
27 | Replace the seat back heater element. Refer to Front Seat Heater Element Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
28 | Inspect for poor connections at the heated seat control module. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 29 | ||||||
29 | Replace the heated seat control module. Refer to Front Seat Heater Control Module Replacement . Is the repair complete? | -- | Go to Step 30 | -- | ||||||
30 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
