Brake Warning Alarm Inoperative Low Fluid Pressure and Flow
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Brake Warning System Check performed? | -- | Go to Step 2 | |
2 |
Does the test lamp light? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the test lamp light? | -- | Go to Step 5 | Go to Step 6 |
4 | Repair the open in the BLK (150) wire between the P/B booster fluid flow alarm switch and ground G112 Does the alarm operate? | -- | Go to Step 2 | |
5 | Replace the P/B booster fluid flow alarm switch. Does the alarm sound? | -- | -- | |
6 |
Is continuity present? | -- | Go to Step 7 | Go to Step 8 |
7 |
Is continuity present? | -- | Go to Step 10 | Go to Step 9 |
8 | Repair the open in the DK GRN (860) wire between the P/B booster fluid pressure alarm switch connector cavity Band the P/B booster fluid flow alarm switch connector cavity A. Does the alarm sound? | -- | -- | |
9 | Replace the P/B booster fluid pressure alarm switch. Does the alarm sound? | -- | Go to Step 2 | |
10 |
Is continuity present? | -- | Go to Step 11 | Go to Step 12 |
11 | Replace the P/B booster fluid flow and pressure alarm delay module. Does the alarm sound? | -- | Go to Step 2 | |
12 | Connect a J 39200 between the P/B booster fluid flow and pressure alarm delay module connector cavity C and connector C113 terminal A Is continuity present? | -- | Go to Step 13 | Go to Step 14 |
13 | Repair the open in the PNK (849) wire between the connector C113 cavity A and the P/B booster fluid pressure alarm switch connector cavity A. Does the alarm sound? | -- | -- | |
14 | Repair the open in the PNK (849) wire between the P/B booster fluid flow and pressure alarm delay module connector cavity C and connector C113 cavity A. Does the alarm sound? | -- | -- |
Brake Warning Alarm Inoperative Brake Warning Lamp OK
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Brake Warning System Check performed? | -- | Go to Step 2 | |
2 |
Does the test lamp light? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the ohmmeter display the correct resistance? | 1.5 Kohms | Go to Step 7 | Go to Step 5 |
4 | Is the BRAKE fuse open? | -- | Go to Step 14 | Go to Step 15 |
5 | Is the resistance much greater than the specified value? | 1.5 Kohms | Go to Step 8 | Go to Step 6 |
6 | Is the resistance much less than the specified value? | 1.5 Kohms | Go to Step 9 | -- |
7 |
Is continuity present? | -- | Go to Step 10 | Go to Step 11 |
8 | Is there an open in the BLK/YEL (441) wire between connector C217 and in-line resistor R208? | -- | Go to Step 16 | Go to Step 17 |
9 | Replace the shorted in-line resistor R208. Is the alarm operative? | -- | Go to Step 2 | |
10 | Connect a J 39200 between P/B booster fluid flow and pressure alarm delay module connector cavity E for the BLK/YEL (1471) wire and the P/B booster fluid flow alarm connector cavity A for the BLK/YEL (1471) wire. Is continuity present? | -- | Go to Step 12 | Go to Step 13 |
11 | Locate and repair the open in the BLK/YEL (1471) wire between in-line resistor R208 and the P/B booster fluid flow alarm. Is the alarm operative? | -- | Go to Step 2 | |
12 | Replace the P/B booster fluid flow alarm. Is the alarm operative? | -- | -- | |
13 | Locate and repair the open in the BLK/YEL (1471) wire between the P/B booster fluid flow and pressure alarm delay module cavity E and the P/B booster fluid flow alarm cavity A. Is the alarm operative? | -- | -- | |
14 | Replace the BRAKE fuse. Is the alarm operative? | -- | Go to Step 2 | |
15 | Repair the open in the BRN (441) wire between the IP fuse block cavity N3 and connector C217 terminal B. Is the alarm operative? | -- | Go to Step 2 | |
16 | Locate and repair the open in the BLK/YEL (441) wire between connector C217 and in-line register R208. Is the alarm operative? | -- | Go to Step 2 | |
17 | Is there an open in the BLK/YEL (1471) wire between in-line resistor R208 and the P/B booster fluid flow and pressure delay module? | -- | Go to Step 18 | Go to Step 19 |
18 | Locate and repair the open in the BLK/YEL (1471) wire between in-line resistor R208 and the P/B booster fluid flow and pressure delay module. Is the alarm operative? | -- | Go to Step 19 | |
19 | If no open is found in the wire, replace the open resistor R208. Is the alarm operative? | -- | -- |
